Comtek Communications Technology, Inc.

357 West 2700 South
Salt Lake City, Utah 84115
United States
Telephone: 800-496-3463 or 801-466-3463.
Fax: 801-484-6906.
Web: http://www.comtek.com.
Email: sales@comtek.com.

Products manufactured by Comtek Communications Technology, Inc. (listed alphabetically)

1. AUTO-SELECT TUNING PERSONAL RECEIVER (MODEL PR-75)

   The Auto-Select Tuning Personal Receiver, model PR-75, is an FM amplification system designed for use by individuals who are hard of hearing. When turned on by plugging its headphones into the audio output connector, this receiver automatically initiates the tuning sequence and makes decisions about the channel selection, tuning itself to the correct transmitter. If other transmissions need to be monitored, a manual, one-button tuning control causes the receiver to seek any other on-channel group frequency transmission in the 72-76 MegaHertz wide band channel group. A single LED (light-emitting diode) indicator system monitors all necessary receiver functions. The LED indicator blinks rapidly to indicate channel selection during the initial tuning process, glows continuously when a signal is being received, and flashes at a steady slow rate when that the receiver is no longer receiving a signal. Control features include a volume control with a 50 decibel (dB) range; automatic turn-on when headphone is plugged in and turn-off when headphone is removed; and one-button tuning reset. The receiver's antenna is integral with the headphone cable, so there is no external antenna. POWER: Uses two 1.5-volt double-A alkaline batteries or rechargeable NiMH (nickel-metal hydride) battery. Low batteries are indicated by a rapidly flashing LED and audible beeping. OPTIONS: Portable fast charger / storage case for 12 receivers, or single charger unit. DIMENSIONS (HxLxW): 1.625 x 2.5 x 3.25 inches. WARRANTY: One year.

2. BASE STATION TRANSMITTER (MODEL BST-25/216)

   The Base Station Transmitter, model BST-25/216, is a transmitter for an FM amplification system designed for use by individuals who are hard of hearing. This transmitter may be used for personal cueing, for tour guide applications, and language interpretation, as well as for assistive listening applications, and is compatible with the PR-216 Personal Receiver (see separate entry). It has 57 user-selectable channels in the 216-217 megahertz (MHz) range, including 38 standard narrow-band channels and 19 high-fidelity narrow-band channels with companded audio processing. The transmitter has a single-window LED (light-emitting diode) display for operation indicators, including a bargraph VU Meter that displays audio input (modulation), a two-digit alpha numeric display that shows the operating channel, a five-digit numeric display that shows operating frequency, an antenna indicator that displays deficient antenna condition, a lock-out Indicator that shows tuning has been disabled, and a test-tone generator for receiver testing and audio level referencing. A microcontroller automatically sets the modulation deviation, the audio mode for companding processing, and the EQ when corresponding channels are selected. The device can accommodate a top-mounted telescopic antenna or an external antenna. It comes with a female audio input connector for microphone and line level input; a male power input connector; and a BNC type RF output connector. An Operator's Manual may be downloaded from the manufacturer's web site. POWER: Uses alternating current (AC) or 12 volts direct current (DC). DIMENSIONS (HxLxW): 1.75 x 5 5/8 x 6.5 inches. WEIGHT: 44 ounces. WARRANTY: One year.

3. BASE STATION TRANSMITTER ADAPTER (MODEL M-72)

   The Base Station Transmitter Adapter is a transmitter for FM amplification systems designed to add flexibilty and variety to wireless sound transmission for individuals who are hearing disabled. This unit was designed to be used with the M-72 wireless microphone transmitter (see separate entry) which conveniently plugs into the back of the base station enabling the transmitter to operate in a permanent, AC powered installation, and if necessary, with an external antenna. The base station accepts its ausio input from any line level output (microphone level option) audio system and transmits this signal to any Comtek receiver. It is equipped with R.F. output indicator that monitors normal R.F. output level and a modulation for maximum signal to noise performance. It is self contained for portable applications, but it may be rack mounted for permanent installations. This unit allows the wirelees microphone to be used in a number of places including theaters, churches and auditoriums. It may also be used as part of a wireless intercom system for duplex communications, as a transmitter to monitor live soundtrack, or as a base transmitter providing a wireless audio point-to-point link. POWER: 115 V AC or optional 12V DC battery pack. OPTIONS: A rackmounting adapter kit is available for standard 19 inch rackmount. DIMENSIONS: (WxDxH) 8x7.5x2.5 inches.

4. CHATPACK DESKTOP SOUND FIELD SYSTEM (MODEL TA-1)

   The ChatPack Desktop Sound Field System, model TA-1, is an FM amplification system designed for use by individuals who are hard of hearing. This desktop system can be used in a classroom to increase the voice level of the teacher over background noise, or it can be used with a variety of audio sources such as a television, VCR, or DVD player. The system includes a ChatPack desktop speaker, a receiver, a transmitter, and a headset. The receiver provides a link between the wireless microphone transmitter and the speaker unit. This FM system operates in the interference-free 216 megahertz (MHz) Low Power Radio Service band recently allocated by the Federal Communications Commission (FCC) for Americans with Disabilities Act (ADA) type services. The transmitter can be as far away as 200 feet from the speaker without the speaker requiring any exposed antennas. The audio frequency response of the speaker is equalized through the FM system to enhance the psophometric response while maintaining a high acoustic gain before feedback. This equalization maximizes the wireless microphone transmitter's ability to operate in close proximity to the speaker without accruing feedback. The system includes one short connecting cord that provides power to both the receiver and audio to the speaker unit. The receiver can also be used as a personal FM receiver with a neck-loop, earphones, or with direct audio-input cords for hearing aids or a cochlear speech processor. The speaker unit and the receiver are housed in a protective carrying pouch. POWER: The speaker uses 6 standard double-A nickel-metal hydride rechargeable batteries, which also "Phantom"-powers the receiver. The system comes with a dual charger that charges both the speaker and the wireless microphone transmitter. WARRANTY: One year.

5. COMTEK COMPANION (MODEL AT-72 KIT)

   The Comtek Companion AT-72 FM wireless auditory assistance kit is a personal FM amplification system designed for persons who use a hearing aid. The Companion is an auditory assistance system that creates a wireless FM sound link between a transmitter worn by a speaker and a receiver worn by the person with a hearing impairment. This link enables intelligible speech to be heard even in noisy situations or locations with a lot of background noise. The kit includes the following: one M-72AT transmitter; one PR-72b personal receiver with plug-in frequency selector; one AT-350 lapel microphone; one SM-N earphone assembly; one NTC-102 neckloop transducer; one NBC9-2R battery charger and two rechargeable batteries; one CB-48 attenuator/adapter cable; two belt clip pouches; and a carry case. Other kits include other options including what is listed above. Option A comes with one PR-72b personal receiver with plug in frequency selector and an external microphone/audio input, as well as one AT-350T lapel environmental microphone. Option C comes with one PR-72b personal receiver with plug in frequency selector and raised volume control. OPTION D is Option C with an additional LS-2 light weight headphone. The Smart Mic package comes with one PR-72b personal receiver with plug in frequency selector and a smart-mic receiver with automatic priority microphone which includes one M-4020P small plug in environmental microphone. The Smart-Mic TCR package adds on one TCR telecoil receiver to the Smart Mic package. Frequency Response: 100 Hz to 10 KHz with M4005 microphone. Signal-to-Noise Ratio: Better than 60 dB, related to output. Receiver Audio Output: 2.5 volts RM, adjustable with volume control. 138dB SPL with 100 ohms SM-N earphone. R.F. Carrier Frequency: 72 to 76 MHz. Receiver Channel Separation: 50 KHz or 200 KHz channels. Frequency Stability: .005% crystal controlled. System Range: Signal-to-noise ratio in excess of 50 dB at 200 feet typical (500 feet in favorable conditions). Special Features: Charging access through input and output jacks for use with the NBC 9-2 Battery Conditioner. Automatic receiver turn-off if output plug is removed. POWER: Battery Life: Up to 40 hours when used with a 9 volt alkaline battery. Six hours of operation with a rechargeable nickel \cadmium battery VTR 9-100. OPTIONS: Tabletop Microphone available from Potomac Technologies. Additional receivers are available from Hear-More Inc. for $238.50. DIMENSIONS: 1-1/16 by 2-1/4 by 3-1/4 inches. WEIGHT: 4 oz. WARRANTY: 1 year on parts and labor for transmitter and receiver.

6. CONFERENCE TABLE MICROPHONE ADAPTER (MODEL TM-10)

   The Conference Table Microphone Adapter, model TM-10, is a microphone adapter for an FM amplification system, designed for use by individuals who are hard of hearing. This device can be used with Comtek's Personal Assistive Listening System, model AT-216 (see separate entry). When the clip-on lapel microphone included with the AT-216 is inserted into this device, it is transformed into a table-top conference microphone that functions as an acoustically tailored "boundary-type" microphone. The reflective surface of a table or desk becomes the boundary area within which the microphone picks up sound. This allows the user to hear everyone sitting around the table without passing around a microphone. The device emphasizes the frequencies that enhance speech clarity. A second microphone and microphone adapter can be used for applications such as "daisy chaining" or combining two conference table microphones. DIMENSIONS (HxW): 0.64 x 2 inches. WEIGHT: 1.33 ounces with microphone.

7. PERSONAL ASSISTIVE LISTENING SYSTEM (MODEL AT-216)

   The Personal Assistive Listening System, model AT-216, is an FM amplification system designed for use by individuals who are hard of hearing. The system includes a Comtek personal receiver and a neck loop, which are worn by the listener, and a Comtek transmitter. The personal receiver picks up the voice of the person wearing the transmitter, and the neck-loop then re-transmits it to the user's hearing aid (not included) with a "T" switch (telecoil pick-up). If hearing aids are not used, the receiver may also be used with headphones in place of the neck-loop. The operating range is about 200 feet. The system can transmit audio from a tape or CD player, TV, VCR, or compatible telephones and conference table microphones, and the system's microphone may be used to mix voice with auxiliary audio input. The system includes a snap-on clip for attaching the transmitter or receiver to a pocket or belt. Channel adjustment switches are covered by the snap-on clip to prevent accidental channel changes. The complete system includes one Comtek M-216 wireless microphone transmitter, one Comtek SM-183 omnidirectional lapel microphone, one Comtek PR-216 personal receiver, one Comtek NTC-102 neck-loop transductor, an earphone, an auxiliary audio input cable, and a carrying case. An Operator's Manual may be downloaded from the manufacturer's web site. POWER: Uses 9 volt alkaline batteries or rechargeable Ni-MH batteries (included). A battery charger is also included. OPTIONS: Mute Switch to mute the speaker's voice from the transmitter while allowing auxiliary input to continue; Enviro-Mic environmental microphone to enhance receiver's ability to discriminate the speaker's voice from environmental sounds; Smart-Mic to prioritize the teacher's (or speaker's) voice over environmental sounds, then activate the environmental microphone when the teacher (speaker) is not speaking to allow student (audience) comments and questions to be heard; Micro-Mini Jack Input for the Enviro-Mic, Smart-Mic, and other accessories such as hand-held directional microphones, clip-on speech training microphones, and telephone adapters; Conference Table Microphone Adapter for converting the system's lapel microphone into a table top or "boundary-type" microphone; Handheld Microphone Boom, a unidirectional microphone that can be pointed to a sound source. DIMENSIONS (HxLxW): Transmitter and receiver, 1 1/16 x 2.25 x 3.75 inches. WEIGHT: 4 ounces. WARRANTY: One year.

8. PERSONAL COMPANION RECEIVER (MODEL PR-72B)

   The Personal Companion Receiver, model PR-72B, is an FM amplification system designed for persons who use a hearing aid. The Receiver operates with hearing aids, earphones, headphones, or neckloop transductor to be used with M-72AT, M-72L or M-72BS base station transmitter. It can also be used for professional studio communications, personal cuing, industrial communications and individual auditory assistance. Because of extended frequency response and low noise level it can be used with video cameras and portable tape recorders. It comes with one belt clip carrying pouch. Option 1 is standard and includes plug-in frequency selector. OPTIONS: Option 2 comes with external microphone/ audio input for specialty application for $315.00. Option 3 has a switch for two-channel operation for $298.00. Option 4 offers an On/Off switch for $270.50. Option 5 offers an extremely rugged volume control for general public use for $270.50. Option SM is the Smart Mic option which automatically prioritizes speech over noise for general public use. It includes an M-4020P omni-directional microphone. POWER: Uses 9 volt alkaline or nickel-cadmium battery. DIMENSIONS: 1-1/16 by 2-1/4 by 3-1/4 inches. WEIGHT: 4 ounces.

9. SOUND FIELD SYSTEM (MODELS TA-5 & TA-6)

   The Sound Field System is an FM amplification system designed for use by individuals who are hard of hearing. The system includes a single speaker that provides full coverage for a classroom or other room. The system also includes a Comtek M-216 body pack transmitter and a Comtek PR-216 receiver, which links the transmitter to the speaker and which can also be used as a personal body-pack receiver. Additional receivers can be used by multiple listeners. The body-pack transmitter may be used with a unidirectional clip-on lapel microphone or with a noise-canceling, head-worn microphone, and can be connected to another audio source such as a TV, VCR, or CD player. Model TA-5 has a speaker that may be set on a shelf or mounted a tripod stand (included). The model TA-6 speaker is smaller and can be set on a shelf or table. POWER: Uses 120 volts alternating current (AC); the receiver is phantom-powered directly from the speaker. WEIGHT: Model TA-5 weighs 17.5 pounds; model TA-6 weighs 7 pounds. WARRANTY: One year.

10. TELEPHONE ADAPTER KIT (MODEL TA-100)

    The Telephone Adapter Kit, model TA-100, is a special amplification device designed to provide additional amplification on the telephone for individuals who are hard of hearing. It provides binaural listening and enhances the frequency response. This product is to be used with a Comtek Receiver, model PR-72b, with option 2 (see separate entry). WARRANTY: One year limited.

11. TRANSMITTER AND BASE STATION ADAPTER (MODELS BSA-72 & M-72L)

    FM transmitter relays sound from a central sound system directly to the hearing impaired. User wears personal receiver connected to hearing aid or earphones. Unit allows user to receive sound direct from speakers, musical instruments, or stage action eliminating most background noise. Has a range of 400 feet when used with PR72 or PR82 personal receiver. 115 V AC or optional 12V DC battery pack. 8 inches wide by 7 1/2 inches deep by 2 1/2 inches high. A rack mounting adapter kit (RMK1) is available for standard 19 inch rackmount. M-72 transmitter with base station adapter which enables it to operate in a permanent AC powered installation, and if necessary, with an external antenna. Accepts audio input from any line level output (microphone level optional) audio system and transmits this signal to personal receiver. Self-contained for portable applications but may be rack mounted for permanent installations. 115 volt AC or optional 12 volt DC battery pack. 8 inches wide by 7 1/2 inches deep by 2 1/2 inches high. Rack mounting kit, RMK-1 available separately for $24.00.

12. WIRELESS MICROPHONE TRANSMITTER & RECEIVER (MODELS M-216 & PR-216)

    The Wireless Microphone Transmitter and Receiver, models M-216 and PR-216, is a wireless microphone transmitter and receiver for an FM amplification system, designed for use by individuals who are hard of hearing. The transmitter can transmit and the receiver can receive on a total of 57 synthesized channels (19 high fidelity channels and 38 standard channels) in the 216-217 megahertz (MHz) Low Power Radio Service (LPRS) band. The operating range is 200 feet. The transmitter's microcontroller automatically sets the modulation deviation, companding or non-companding audio processing, and the EQ when corresponding channels are selected. The receiver has channel-selectability for crowded radio frequency environments. In addition to being compatible with the M-216 personal transmitter, the receiver is compatible with the BST-25/216 Base Station Transmitter (see separate entry). Operator's Manuals for the transmitter and receiver may be downloaded from the manufacturer's web site. OPTIONS: Transmitter with a short whip antenna. POWER: Uses 9-volt alkaline batteries or rechargeable Ni-MH batteries. DIMENSIONS (HxLxW): Both models are 1 1/16 x 2.5 x 3.75 inches. Optional short whip attenna is 6 inches long. WEIGHT: Both models weigh 4 ounces. WARRANTY: One year.

13. WIRELESS MICROPHONE TRANSMITTER (MODEL M-72)

    The Wireless Microphone Transmitter, model M-72, is a transmitter for FM amplification syatem for individuals who are hard of hearing. This transmitter has a soft compressor system which allows a wide dynamic range. Along with very linear modulation chatacteristics and low residual FM noise, it gives the most natural sound possible fron a wireless microphone. It is available with a companded or non-companded ausio system for use with any Comtek receiver (see separate entry). There is an LED indicator to monitor RF output and battery condition, and a microphone sesitivity adjustment is provided to optimize the signal-to-noise ratio for different applications. The transmitter utilizes a body industion antenna system. Only the microphone cord extends fron the trandmitter package enabling the transmitter to have a more uniform radiation pattern ehrn the unit is placed on the body or held in the hand. POWER: Rechargeable battery. OPTIONS: A separate microphone muting switch or a push button muting switch for quiet audio switching is available for $30 more. WARRANTY: One year limited.

See Comtek Communications Technology, Inc. products that are no longer available.