Uhf Diversity Wireless
Uhf Diversity Wireless
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Audio-Technica Atw-702 Uhf Handheld Wireless System $249.95 The Audio Technica ATW-702 UHF Handheld Wireless System includes the ATW-R700 receiver, the ATW-T702 handheld unidirectional dynamic microphone/transmitter, and the AT8456a Quiet-Flex stand clamp. The ATW-702 UHF Handheld wireless system delivers professional features and sound quality unheard of in its class. This easy-to-use wireless microphone system feature eight selectable frequency-coordinated channels, diversity operation for increased range/reliability, manual and automatic frequency scanning, Tone Lock squelch and more. The ATW-702 wireless system provides a choice of eight PLL synthesized UHF frequencies in the 542-561 MHz band (TV channels 26-29). For multiple-mic applications as many as eight systems may be used together. ATW-R700 Receiver The ATW-R700 receiver features diversity reception. Logic circuitry monitors reception, selecting the superior signal from two antennas, providing better sound quality and reducing the possibility of interference and dropouts. Soft-touch controls provide convenient access to selection of operating frequency and automatic scanning, while an LED display indicates selected channel and scanning operation. The ATW-R700 receiver also features a sophisticated Tone Lock tone squelch system that opens the receiver's audio output only when a 700 Series transmitter is detected, reducing the possibility of interference. ATW-T702 handheld transmitter The ATW-T702 handheld dynamic microphone/transmitter features a rugged dynamic unidirectional element designed for professional live-sound venues. The ATW-T702 uses two 1.5V AA batteries for economical operation and wide availability and also features a multicolor Power/Mute/Battery indicator. Includes AT8456a Quiet-Flex stand clamp for A-T handheld wireless transmitters, with 5/8"-27 threads. 8 selectable frequency-coordinated UHF channels Use up to 8 simultaneous systemsall channels compatible Automatic frequency scanning selects an open channel at the touch of a button Diversity operation for increased range/reliability - Selects the stronger signal from two antennas LED Channel display plus Antenna, AF Peak indicators Transmitters also feature multi-color battery/power indicator Balanced XLR and unbalanced 1/4" output connectors Tone Lock squelch system eliminates interference when transmitter is off UniPak transmitter features: separate guitar/mic trim control, switchable high/low RF power, internal channel selector, multi-color battery/power indicator Handheld transmitter features: variable trim control, internal channel selector, multi-color battery/power indicator AA operation on handheld microphone and UniPak transmitter 812 hours for UniPak; 12 hours for handheld Freeway body-pack systems are compatible with all Audio-Technica Wireless Essentials microphones and cables |
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Nady U-33B UHF Bass Wireless Microphone System MU4 / 493.55 $179.95 The Nady U-33B UHF is a wireless mic system optimized for use with bass guitar. It includes the U-33B receiver and bodypack transmitter. The receiver operates on single frequencies in the wide-open, uncluttered UHF 470-510MHz band and features Nady's DigiTRUE Diversity circuitry for maximum range and dropout-free performance. Unique companding circuitry delivers enhanced headroom of an industry best 120dB. A front-panel squelch control allows easy adjustment for clear reception. Bass Boost control allows dialing in the precise boost and presence desired. The wireless bodypack transmitter features a flexible rubber antenna, a locking jack for the instrument cable, a mute switch for silencing the system with the receiver on, and a battery status LED indicator. The Nady bass mic system operates on 3 AAA alkaline or NiMH batteries. |
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Nady U-33B UHF Bass Wireless Microphone System MU2 / 480.55 $179.99 The Nady U-33B UHF is a wireless mic system optimized for use with bass guitar. It includes the U-33B receiver and bodypack transmitter. The receiver operates on single frequencies in the wide-open, uncluttered UHF 470-510MHz band and features Nady's DigiTRUE Diversity circuitry for maximum range and dropout-free performance. Unique companding circuitry delivers enhanced headroom of an industry best 120dB. A front-panel squelch control allows easy adjustment for clear reception. Bass Boost control allows dialing in the precise boost and presence desired. The wireless bodypack transmitter features a flexible rubber antenna, a locking jack for the instrument cable, a mute switch for silencing the system with the receiver on, and a battery status LED indicator. The Nady bass mic system operates on 3 AAA alkaline or NiMH batteries. |
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Nady U-33B UHF Bass Wireless Microphone System MU1 / 470.55 $179.99 The Nady U-33B UHF is a wireless mic system optimized for use with bass guitar. It includes the U-33B receiver and bodypack transmitter. The receiver operates on single frequencies in the wide-open, uncluttered UHF 470-510MHz band and features Nady's DigiTRUE Diversity circuitry for maximum range and dropout-free performance. Unique companding circuitry delivers enhanced headroom of an industry best 120dB. A front-panel squelch control allows easy adjustment for clear reception. Bass Boost control allows dialing in the precise boost and presence desired. The wireless bodypack transmitter features a flexible rubber antenna, a locking jack for the instrument cable, a mute switch for silencing the system with the receiver on, and a battery status LED indicator. The Nady bass mic system operates on 3 AAA alkaline or NiMH batteries. |
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Nady U-33B UHF Bass Wireless Microphone System MU3 / 484.55 $179.99 The Nady U-33B UHF is a wireless mic system optimized for use with bass guitar. It includes the U-33B receiver and bodypack transmitter. The receiver operates on single frequencies in the wide-open, uncluttered UHF 470-510MHz band and features Nady's DigiTRUE Diversity circuitry for maximum range and dropout-free performance. Unique companding circuitry delivers enhanced headroom of an industry best 120dB. A front-panel squelch control allows easy adjustment for clear reception. Bass Boost control allows dialing in the precise boost and presence desired. The wireless bodypack transmitter features a flexible rubber antenna, a locking jack for the instrument cable, a mute switch for silencing the system with the receiver on, and a battery status LED indicator. The Nady bass mic system operates on 3 AAA alkaline or NiMH batteries. |
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Nady U-33B UHF Bass Wireless Microphone System MU3 / 484.55 889406737358 $90 The Nady U-33B UHF is a wireless mic system optimized for use with bass guitar. It includes the U-33B receiver and bodypack transmitter. The receiver operates on single frequencies in the wide-open, uncluttered UHF 470-510MHz band and features Nady's DigiTRUE Diversity circuitry for maximum range and dropout-free performance. Unique companding circuitry delivers enhanced headroom of an industry best 120dB. A front-panel squelch control allows easy adjustment for clear reception. Bass Boost control allows dialing in the precise boost and presence desired. The wireless bodypack transmitter features a flexible rubber antenna, a locking jack for the instrument cable, a mute switch for silencing the system with the receiver on, and a battery status LED indicator. The Nady bass mic system operates on 3 AAA alkaline or NiMH batteries. |
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Used Audio-Technica Atw-702 Uhf Handheld Wireless System $227.45 The Audio Technica ATW-702 UHF Handheld Wireless System includes the ATW-R700 receiver, the ATW-T702 handheld unidirectional dynamic microphone/transmitter, and the AT8456a Quiet-Flex stand clamp. The ATW-702 UHF Handheld wireless system delivers professional features and sound quality unheard of in its class. This easy-to-use wireless microphone system feature eight selectable frequency-coordinated channels, diversity operation for increased range/reliability, manual and automatic frequency scanning, Tone Lock squelch and more. The ATW-702 wireless system provides a choice of eight PLL synthesized UHF frequencies in the 542-561 MHz band (TV channels 26-29). For multiple-mic applications as many as eight systems may be used together. ATW-R700 Receiver The ATW-R700 receiver features diversity reception. Logic circuitry monitors reception, selecting the superior signal from two antennas, providing better sound quality and reducing the possibility of interference and dropouts. Soft-touch controls provide convenient access to selection of operating frequency and automatic scanning, while an LED display indicates selected channel and scanning operation. The ATW-R700 receiver also features a sophisticated Tone Lock tone squelch system that opens the receiver's audio output only when a 700 Series transmitter is detected, reducing the possibility of interference. ATW-T702 handheld transmitter The ATW-T702 handheld dynamic microphone/transmitter features a rugged dynamic unidirectional element designed for professional live-sound venues. The ATW-T702 uses two 1.5V AA batteries for economical operation and wide availability and also features a multicolor Power/Mute/Battery indicator. Includes AT8456a Quiet-Flex stand clamp for A-T handheld wireless transmitters, with 5/8"-27 threads. 8 selectable frequency-coordinated UHF channels Use up to 8 simultaneous systemsall channels compatible Automatic frequency scanning selects an open channel at the touch of a button Diversity operation for increased range/reliability - Selects the stronger signal from two antennas LED Channel display plus Antenna, AF Peak indicators Transmitters also feature multi-color battery/power indicator Balanced XLR and unbalanced 1/4" output connectors Tone Lock squelch system eliminates interference when transmitter is off UniPak transmitter features: separate guitar/mic trim control, switchable high/low RF power, internal channel selector, multi-color battery/power indicator Handheld transmitter features: variable trim control, internal channel selector, multi-color battery/power indicator AA operation on handheld microphone and UniPak transmitter 812 hours for UniPak; 12 hours for handheld Freeway body-pack systems are compatible with all Audio-Technica Wireless Essentials microphones and cables |
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Used Audio-Technica Atw-702 Uhf Handheld Wireless System 886830244681 $212.46 The Audio Technica ATW-702 UHF Handheld Wireless System includes the ATW-R700 receiver, the ATW-T702 handheld unidirectional dynamic microphone/transmitter, and the AT8456a Quiet-Flex stand clamp. The ATW-702 UHF Handheld wireless system delivers professional features and sound quality unheard of in its class. This easy-to-use wireless microphone system feature eight selectable frequency-coordinated channels, diversity operation for increased range/reliability, manual and automatic frequency scanning, Tone Lock squelch and more. The ATW-702 wireless system provides a choice of eight PLL synthesized UHF frequencies in the 542-561 MHz band (TV channels 26-29). For multiple-mic applications as many as eight systems may be used together. ATW-R700 Receiver The ATW-R700 receiver features diversity reception. Logic circuitry monitors reception, selecting the superior signal from two antennas, providing better sound quality and reducing the possibility of interference and dropouts. Soft-touch controls provide convenient access to selection of operating frequency and automatic scanning, while an LED display indicates selected channel and scanning operation. The ATW-R700 receiver also features a sophisticated Tone Lock tone squelch system that opens the receiver's audio output only when a 700 Series transmitter is detected, reducing the possibility of interference. ATW-T702 handheld transmitter The ATW-T702 handheld dynamic microphone/transmitter features a rugged dynamic unidirectional element designed for professional live-sound venues. The ATW-T702 uses two 1.5V AA batteries for economical operation and wide availability and also features a multicolor Power/Mute/Battery indicator. Includes AT8456a Quiet-Flex stand clamp for A-T handheld wireless transmitters, with 5/8"-27 threads. 8 selectable frequency-coordinated UHF channels Use up to 8 simultaneous systemsall channels compatible Automatic frequency scanning selects an open channel at the touch of a button Diversity operation for increased range/reliability - Selects the stronger signal from two antennas LED Channel display plus Antenna, AF Peak indicators Transmitters also feature multi-color battery/power indicator Balanced XLR and unbalanced 1/4" output connectors Tone Lock squelch system eliminates interference when transmitter is off UniPak transmitter features: separate guitar/mic trim control, switchable high/low RF power, internal channel selector, multi-color battery/power indicator Handheld transmitter features: variable trim control, internal channel selector, multi-color battery/power indicator AA operation on handheld microphone and UniPak transmitter 812 hours for UniPak; 12 hours for handheld Freeway body-pack systems are compatible with all Audio-Technica Wireless Essentials microphones and cables |
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Used Audio-Technica Atw-702 Uhf Handheld Wireless System 886830244698 $187.46 The Audio Technica ATW-702 UHF Handheld Wireless System includes the ATW-R700 receiver, the ATW-T702 handheld unidirectional dynamic microphone/transmitter, and the AT8456a Quiet-Flex stand clamp. The ATW-702 UHF Handheld wireless system delivers professional features and sound quality unheard of in its class. This easy-to-use wireless microphone system feature eight selectable frequency-coordinated channels, diversity operation for increased range/reliability, manual and automatic frequency scanning, Tone Lock squelch and more. The ATW-702 wireless system provides a choice of eight PLL synthesized UHF frequencies in the 542-561 MHz band (TV channels 26-29). For multiple-mic applications as many as eight systems may be used together. ATW-R700 Receiver The ATW-R700 receiver features diversity reception. Logic circuitry monitors reception, selecting the superior signal from two antennas, providing better sound quality and reducing the possibility of interference and dropouts. Soft-touch controls provide convenient access to selection of operating frequency and automatic scanning, while an LED display indicates selected channel and scanning operation. The ATW-R700 receiver also features a sophisticated Tone Lock tone squelch system that opens the receiver's audio output only when a 700 Series transmitter is detected, reducing the possibility of interference. ATW-T702 handheld transmitter The ATW-T702 handheld dynamic microphone/transmitter features a rugged dynamic unidirectional element designed for professional live-sound venues. The ATW-T702 uses two 1.5V AA batteries for economical operation and wide availability and also features a multicolor Power/Mute/Battery indicator. Includes AT8456a Quiet-Flex stand clamp for A-T handheld wireless transmitters, with 5/8"-27 threads. 8 selectable frequency-coordinated UHF channels Use up to 8 simultaneous systemsall channels compatible Automatic frequency scanning selects an open channel at the touch of a button Diversity operation for increased range/reliability - Selects the stronger signal from two antennas LED Channel display plus Antenna, AF Peak indicators Transmitters also feature multi-color battery/power indicator Balanced XLR and unbalanced 1/4" output connectors Tone Lock squelch system eliminates interference when transmitter is off UniPak transmitter features: separate guitar/mic trim control, switchable high/low RF power, internal channel selector, multi-color battery/power indicator Handheld transmitter features: variable trim control, internal channel selector, multi-color battery/power indicator AA operation on handheld microphone and UniPak transmitter 812 hours for UniPak; 12 hours for handheld Freeway body-pack systems are compatible with all Audio-Technica Wireless Essentials microphones and cables |
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Used Audio-Technica Atw-702 Uhf Handheld Wireless System 886830223891 $124.98 The Audio Technica ATW-702 UHF Handheld Wireless System includes the ATW-R700 receiver, the ATW-T702 handheld unidirectional dynamic microphone/transmitter, and the AT8456a Quiet-Flex stand clamp. The ATW-702 UHF Handheld wireless system delivers professional features and sound quality unheard of in its class. This easy-to-use wireless microphone system feature eight selectable frequency-coordinated channels, diversity operation for increased range/reliability, manual and automatic frequency scanning, Tone Lock squelch and more. The ATW-702 wireless system provides a choice of eight PLL synthesized UHF frequencies in the 542-561 MHz band (TV channels 26-29). For multiple-mic applications as many as eight systems may be used together. ATW-R700 Receiver The ATW-R700 receiver features diversity reception. Logic circuitry monitors reception, selecting the superior signal from two antennas, providing better sound quality and reducing the possibility of interference and dropouts. Soft-touch controls provide convenient access to selection of operating frequency and automatic scanning, while an LED display indicates selected channel and scanning operation. The ATW-R700 receiver also features a sophisticated Tone Lock tone squelch system that opens the receiver's audio output only when a 700 Series transmitter is detected, reducing the possibility of interference. ATW-T702 handheld transmitter The ATW-T702 handheld dynamic microphone/transmitter features a rugged dynamic unidirectional element designed for professional live-sound venues. The ATW-T702 uses two 1.5V AA batteries for economical operation and wide availability and also features a multicolor Power/Mute/Battery indicator. Includes AT8456a Quiet-Flex stand clamp for A-T handheld wireless transmitters, with 5/8"-27 threads. 8 selectable frequency-coordinated UHF channels Use up to 8 simultaneous systemsall channels compatible Automatic frequency scanning selects an open channel at the touch of a button Diversity operation for increased range/reliability - Selects the stronger signal from two antennas LED Channel display plus Antenna, AF Peak indicators Transmitters also feature multi-color battery/power indicator Balanced XLR and unbalanced 1/4" output connectors Tone Lock squelch system eliminates interference when transmitter is off UniPak transmitter features: separate guitar/mic trim control, switchable high/low RF power, internal channel selector, multi-color battery/power indicator Handheld transmitter features: variable trim control, internal channel selector, multi-color battery/power indicator AA operation on handheld microphone and UniPak transmitter 812 hours for UniPak; 12 hours for handheld Freeway body-pack systems are compatible with all Audio-Technica Wireless Essentials microphones and cables |
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Used Audio-Technica Atw-702 Uhf Handheld Wireless System 886830227806 $187.46 The Audio Technica ATW-702 UHF Handheld Wireless System includes the ATW-R700 receiver, the ATW-T702 handheld unidirectional dynamic microphone/transmitter, and the AT8456a Quiet-Flex stand clamp. The ATW-702 UHF Handheld wireless system delivers professional features and sound quality unheard of in its class. This easy-to-use wireless microphone system feature eight selectable frequency-coordinated channels, diversity operation for increased range/reliability, manual and automatic frequency scanning, Tone Lock squelch and more. The ATW-702 wireless system provides a choice of eight PLL synthesized UHF frequencies in the 542-561 MHz band (TV channels 26-29). For multiple-mic applications as many as eight systems may be used together. ATW-R700 Receiver The ATW-R700 receiver features diversity reception. Logic circuitry monitors reception, selecting the superior signal from two antennas, providing better sound quality and reducing the possibility of interference and dropouts. Soft-touch controls provide convenient access to selection of operating frequency and automatic scanning, while an LED display indicates selected channel and scanning operation. The ATW-R700 receiver also features a sophisticated Tone Lock tone squelch system that opens the receiver's audio output only when a 700 Series transmitter is detected, reducing the possibility of interference. ATW-T702 handheld transmitter The ATW-T702 handheld dynamic microphone/transmitter features a rugged dynamic unidirectional element designed for professional live-sound venues. The ATW-T702 uses two 1.5V AA batteries for economical operation and wide availability and also features a multicolor Power/Mute/Battery indicator. Includes AT8456a Quiet-Flex stand clamp for A-T handheld wireless transmitters, with 5/8"-27 threads. 8 selectable frequency-coordinated UHF channels Use up to 8 simultaneous systemsall channels compatible Automatic frequency scanning selects an open channel at the touch of a button Diversity operation for increased range/reliability - Selects the stronger signal from two antennas LED Channel display plus Antenna, AF Peak indicators Transmitters also feature multi-color battery/power indicator Balanced XLR and unbalanced 1/4" output connectors Tone Lock squelch system eliminates interference when transmitter is off UniPak transmitter features: separate guitar/mic trim control, switchable high/low RF power, internal channel selector, multi-color battery/power indicator Handheld transmitter features: variable trim control, internal channel selector, multi-color battery/power indicator AA operation on handheld microphone and UniPak transmitter 812 hours for UniPak; 12 hours for handheld Freeway body-pack systems are compatible with all Audio-Technica Wireless Essentials microphones and cables |
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Used Audio-Technica Atw-701 700 Series Uhf Lavalier Wireless System $134.98 The Audio Technica ATW-701 UHF Lavalier Wireless System includes the ATW-R700 receiver and the ATW-T701 UniPak transmitter with a lavaliere microphone. The ATW-701 UHF Lavalier wireless system delivers professional features and sound quality unheard of in its class. This easy-to-use wireless microphone system features eight selectable frequency-coordinated channels, diversity operation for increased range/reliability, manual and automatic frequency scanning, Tone Lock squelch and more. The ATW-701 wireless system provides a choice of eight PLL synthesized UHF frequencies in the 542-561 MHz band (TV channels 26-29). For multiple-mic applications as many as eight systems may be used together. ATW-R700 Receiver The ATW-R700 receiver features diversity reception. Logic circuitry monitors reception, selecting the superior signal from two antennas, providing better sound quality and reducing the possibility of interference and dropouts. Soft-touch controls provide convenient access to selection of operating frequency and automatic scanning, while an LED display indicates selected channel and scanning operation. The ATW-R700 receiver also features a sophisticated Tone Lock tone squelch system that opens the receiver's audio output only when a 700 Series transmitter is detected, reducing the possibility of interference. ATW-T701 Body-Pack Transmitter The versatile ATW-T701 UniPak body-pack transmitter has both low- and high-impedance inputs plus a bias connection, for use with dynamic and electret condenser microphones, as well as Hi-Z instrument pickups. The UniPak transmitter also offers separate trim controls for guitar and microphone, plus switchable high/low RF power. The ATW-T701 uses two 1.5V AA batteries for economical operation and wide availability and also features a multicolor Power/Mute/Battery indicator. Lavalier microphone The included miniature cardioid condenser Lavalier microphone can be worn as a Lavalier, or hidden in loose clothing. Comes with a 55" (1.4 m) terminated cable with locking 4-pin connector for the Audio Technica UniPak body-pack wireless transmitter. ATW-701 UHF Headworn Wireless System 8 selectable frequency-coordinated UHF channels Use up to 8 simultaneous systemsall channels compatible Automatic frequency scanning selects an open channel at the touch of a button Diversity operation for increased range/reliability - Selects the stronger signal from two antennas LED Channel display plus Antenna, AF Peak indicators Transmitters also feature multi-color battery/power indicator Balanced XLR and unbalanced 1/4" output connectors Tone Lock squelch system eliminates interference when transmitter is off UniPak transmitter features: separate guitar/mic trim control, switchable high/low RF power, internal channel selector, multi-color battery/power indicator Handheld transmitter features: variable trim control, internal channel selector, multi-color battery/power indicator AA operation on handheld microphone and UniPak |
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 4x800Ch UHF Diversity Wireless Handheld Microphone Mic System $329.00 Time Remaining: 17d 17h 18m Buy It Now for only: $329.00 |
 Samson Concert 77 UHF Wireless True Diversity Handheld Microphone W Hardcase $43.00 (3 Bids) Time Remaining: 1d 15h 51m |
 2x800 Channel Diversity UHF Wireless Handheld Microphone Mic System G 788H $199.00 Time Remaining: 7d 17h 36m Buy It Now for only: $199.00 |
 4x800 Channel UHF Diversity Wireless Lapel headset Microphone Mic System HL $329.00 Time Remaining: 22d 18h 32m Buy It Now for only: $329.00 |
 AKG UHF SR40 Diversity Wireless $59.00 Time Remaining: 23d 5h 22m Buy It Now for only: $59.00 |
 198 Ch UHF Diversity Wireless Microphone System 9200 $139.95 Time Remaining: 21d 17h 14m Buy It Now for only: $139.95 |
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 Shure UT UHF Wireless Diversity Receiver Shure SM58 UT2 Vocal Artist Microphone $55.00 (8 Bids) Time Remaining: 2d 14h 58m |
 4x800 Channel UHF Diversity Wireless Microphone Mic System $329.00 Time Remaining: 27d 15h 41m Buy It Now for only: $329.00 |
 4x800 Channal UHF Diversity Wireless Microphone Mic System New $329.00 Time Remaining: 22d 18h 31m Buy It Now for only: $329.00 |
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 UHF Diversity Wireless Handheld Microphone System UGX8+ $223.00 Time Remaining: 8d 7h 54m Buy It Now for only: $223.00 |
 4x800CH UHF Diversity Wireless Hand held Microphone System UGX4+ $339.00 Time Remaining: 16d 20h 57m Buy It Now for only: $339.00 |
 2 x 99 CH UHF Diversity Wireless Microphone System 9300 $149.99 Time Remaining: 3d 17h 49m Buy It Now for only: $149.99 |
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 4x100 Channel LCD UHF Diversity Wireless Handheld Microphone Mic System $279.00 Time Remaining: 26d 1h 59m Buy It Now for only: $279.00 |
 2 x 99 CH UHF Diversity Wireless Microphone System 9200 $139.95 Time Remaining: 3d 18h 47m Buy It Now for only: $139.95 |
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Nady UHF-4 LT Single-Channel DigiTRU Diversity UHF Wireless Lavalier Microphone System (UHF-4 LT SYS/17) List Price: $119.99 Sale Price: $81.18  |
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DigiTRU Diversity for optimum range with freedom from dropouts . Utilizes the uncluttered UHF frequencies for Interference-free operation in any application or locale. Locking 3.5mm mini-jack provides secure connection for removable microphone or instrument cable... |
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GTD Audio G-733H 2x800 Channel Diversity UHF Wireless microphone mic system Sale Price: $189.00 |
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Gtd-Audio's G-733H wireless microphone system delivers superior sound quality and professional features. It is designed for a wide range professional application with 800 selectable frequencies, automatic frequency scanning, true diversity operation, Tone Lock squelch circuit, automatic transmitter setup... |
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Audio-Technica 2000 Series Frequency-agile True Diversity Uhf Wireless Systems List Price: $499.00 Sale Price: Too low to display Used From: $332.93 |
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The ATW-2120 wireless system pairs a cardioid dynamic microphone/transmitter with Audio Technica's ATW-R2100 receiver, giving you a dependable, high-quality wireless system at an extremely affordable price... |
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Nady UHF-4 GT/10 UHF Diversity Instrument Bodypack Wireless System List Price: $139.99 Sale Price: $99.99 Used From: $104.99 |
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The Nady UHF-4 High UHF Band Professional Wireless System with DigiTRU Diversity offers unprecedented value in a full-featured, single-channel UHF wireless mic system. Interference-free operation in any application or locale on select UHF frequencies... |
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GTD Audio G-787H UHF Diversity Wireless Microphone System List Price: $999.00 Sale Price: $329.00 |
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Gtd-Audio's G-787H wireless microphone system delivers superior sound quality and professional features. It is designed for a wide range professional application with 4x800 selectable frequency channels, automatic frequency scanning, true diversity operation, Tone Lock squelch circuit, automatic transmitter setup... |
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Audio-Technica 700 Series 702 Vocal Unipak Frequency-Agile Diversity UHF Wireless System List Price: $399.95 Sale Price: $186.99 Used From: $168.29 |
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HH WRLS MIC System |
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GTD Audio G787L UHF Diversity Wireless Microphone Lapel Lavaliere Mic List Price: $999.00 Sale Price: $329.00 |
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Gtd-Audio's G787L wireless microphone system delivers superior sound quality and professional features. It is designed for a wide range professional application with 4x800 selectable frequency channels, automatic frequency scanning, true diversity operation, Tone Lock squelch circuit, automatic transmitter setup... |
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Audio-Technica 700 Series Unipak Frequency-agile Diversity Uhf Wireless Systems List Price: $429.95 Sale Price: Too low to display Used From: $242.91 |
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Mobile Phone Affecting Human Organs - A Report
Mobile phone affecting human organs - A Report
R.V.K. Charan
Deptt. of Physics, Gaya College, Gaya, Bihar- 823001
E mail- rvkcharan@rediffmail.com
Abstract :- "A mobile cell phone generating EM waves causes a lot of physiological, biological, histological and some occasional degenerative effects on human organs and so it breeds traffic accident if used during driving. However, a particular frequency of 434 MHz per second is found to be suitable for radio therapy of cancer cells. A report of such effects is described here with some remedial measures. "
Keywords:-MHz, GHz, EMwaves, Histological, Morphological & Hippocampus.
Introduction :- A Mobile cell phone works on the principle of EM wireless waves communication which is actually the propagation of energy of electromagnetic radiation created by oscillating charges or particles (called photons) in transverse mode. Such cell phone uses micro-waves of very shorter wave lengths corresponding to very high frequency ranging up to 10 GHz per second and carries enough energy to effect human organs as found by several researchers.
Effect Analysis :- Electromagnetic energy can be classified into two types : (i) Ionising and (ii) Non- ionising, depending upon the frequency-range with reference to ultraviolet limit. Frequency below the ultra-violet band are non-ionising and our cell phones generates such frequencies of electromagnetic radiations. The only physiological effect found on human body is 'heating' due to absorption of the radio frequency energy by the water content in our blood. The magnitude of the absorption or the heating depends upon the type of tissues carrying blood and frequency of the incident waves. As found further by NOISH lab. of U.S.A. the human body is transparent below the frequency of 1 GHz per second and if the frequency is increased above a process of scattering starts and if it is increased further our body starts reflecting visible light radiations of frequency up to 103 GHz. Out of these frequencies Dr. Holt (1) found a specific frequency of 434 MHz per second of the radiations having non-thermal effect on tissues and recommended it suitable for radio therapy of cancer cells whose effect increases cell-divisions by changing the electrochemistry therapy resulting in starvation of cancer cells of energy. Beside the heating effect, Alasks Science Forum(2), U.S.A 1980 revealed that the human head start resonating at its resonant frequency which has been found as 350-400 MHz per second for adults and 600-850 MHz per second for minors (varying from person to person) by absorbing maximum electromagnetic energy resulting in affecting the overall mental processes. Further researchers of Obero University(3), Sweden, 2003 found that use of mobile phone for about an hour per day increases the probability of developing brain tumor by 30%.
Some possible biological effect of mobile phone waves on human organs having close distance from mobile tower or phone with higher power density can be well classified according to different finding, as :-
Sl. No.
Power Density of Mobile Phone wave in micro-watts per square metre
Biological Effect
Reference
01
20
About 100 yds. From mobile Tower, sleep disorder, Abnormal B.P., Nervousness, Weakness, fatiguiness, limb & Joint pain, Digestive problems (for Children)
Altpeter(4), 1995, 97
02
100
Limiting of Human sensation
Kolbun(5),
1987
03
600
About 10ft. from Mobile Phone Altered EEG & Carbohydrate metabolism, Enlarged adrenals, structural change in liver, spleen and testes.
Dumanskij(6), 1973
04
3000
(i.e. 3 mili watts)
Impaired motor function, reaction time, memory & attention (for children),about 3ft from mobile phone
Kolodynski (7),
1996
05
6000
(i.e. 6 mili watts)
About 6ft from mobile phone, Change in Calcium-ions efflux from brain tissue cardiac arrhythmia
Dutta(8), 1986, & Frey(9), 1968
06
25000
(25 wats)
Breakdown of blood-brain barrier
Salford(10),
1997
07
50,000
(50 watts)
Biochemical & Histological changes in liver, heart, kidney & brain tissues, Malonoma & blood cancer.
Belokrinitskiy(11), 1982 & Dolk(12), 1997
08
100,000
(100 watts)
Damaging of cell nuclei in hippocampus of brain, Impaired memory & visual reaction time, and redistribution of metals in lunges, brain, heart, liver, muscles, spleen, bones skin and blood.
Belokrinitskiy( 13) 1982 a Chiang(14), 1989 & Shutenke(15), 1981
Below EM energy of 10 miliwatts per square metre Tolgskays et al (16), 1974 found no gross morphological changes and only occasional degenerative effect of radio waves on human organs,. However, a decrease in ribonucle-protein in tissue elements (normally rich in animals) was found.
Remedial Measures :- World largest cell phone manufacturers(17) patenting different devices to reduce the risk of brain tumors and other diseases by using "The Talk safe Mobile Protection Chip. " Different countries are setting guidelines for the RRPG level (18), (i.e. strength or radio waves with no adverse effect on human body) for cell phone manufacturers. The level has been set to be less than 20 miliwatts per square metre. Such radio equipments must make their SAR (i.e. absorbed energy in any 10 grams of tissue over 6 minutes period) value below 2W/kg. These are the reports of Telecommunications Technology Council, U.A.S. 2000. Further, the mobile tower should be built out of localities in remote areas to minimise the several aforesaid biological effects on human organs and the mobile phone should be used for short duration and only if it is very necessary. Further, person driving motorcycles/cars must not talk on mobile phone as it breeds traffic accident due to diversion of mental attention owing to the aforesaid effects. Even use of latest hands free mobile cell phones are found equally risky & dangerous whilst used in driving, as reported by Washington Post (19). Hence talking on any type of mobile phones must be banned completely for drivers. But persons using mobile phones these days do not opt any precautionary measures and hence invite diseases and accidents. So the aforesaid suggestions should be made mandatory for our safety.
References :-
1. Dr. Holt, Radio waves and Cancer Cells, Stepney, SA 5069, Australia.
2. Alaska Science Forum, Radiowave Effect on Humans, Art .386 Geographisical Institute, University of Alaska Fairbanks, USA.
3. K. Mild, Obero University, Sweden, March, 2003
4. Altpeter et al Study On Health Effects of the Shortwave Transmitter station of Schwarzenburg, Berne, Switzerland, Study No. 55 Swiss Federal Office of Energy, 1995.
5. Kolbun, N.D. and Sit 'ko, S.P., Sensory Indications by the Human body of EHF-rang electromagnetic radiation, Mechanisms of Biological Action of Electromagnetic Radiaion. Proceedings of the Pushchino Symposium, Oct., 1987.
6. Dumanskij et al, Biological Effect and Health Hazards of Microwave Radiation, Proceeding of International Symposium, Warsaw, Oct., 1973.
7. Kolodynski et al, Science of the Total Environment 1887-93, 1996.
8. Dutta et al, Biological Effects of Electro pollution, pp. 63-69, Philadelphia, PA, 1986.
9. Frey et al, Pulse modulate UHF energy illumination of Heart associated with change in heart rate, Life Sciences 7(Part II) : 505-512, 1986.
10. Salford et al, Proceedings of the Second World Congress for Electricity and Magnetism in Biology and Medicine, June - 1997, Italy.
11. Belokrinitskiy, V.S. Hyginic evaluation of biological effects of non-ionising microwaves, Gigiyena i Sanitariya 6:32-34 JPRS 8 1865, pp. 1-5, 1982
12. Dolk et al, Cancer incidence nar radio and television transmitters in Great Britain, American J. of Epidemilogy 145 (1) : 1-9, 1997
13. Belokrintskiy, V.S., Destructive and reparative process in hippocampus with long term exposure to nonionising microwave radiation, Bulletion of Experimental Biology and Medicine 93 (3) : 89-92, 1982
14. Chiang et al, Health effects of Environmental Electromagnetic fields J. of Bioelectricity 8 (1) : 127-131, 1989
15. Shutenke et al, Effects of Super-High Electromagnetic Fields on Animals of different ages, Gigiyena i Sanitariya, no. 10 : 35-38, JPRS 84221, pp. 85-90, 1981
16. Tolgskaya et al, translated by Basil Haigh from Russian, British J. of Industrial Medicine, Pathological Effects of Radio Waves, BMJ publishing Group Ltd. , 1974
17. World Largest cell phone manufactures, The Talk safe Mobile Chip, as published in Sunday Times, U.K. 11th June, 2001.
18. Confirmation Guidlines for Radio Protection, Japan, Possible Biological Effects of electromagnetic Fields, Interim Report by Committee, Jan., 2001
19. Halsay Ashley, Washington Post, Report Hindustan Times, Patna, dt. 30.01.2010.
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