A new high spec base station microphone suitable for both Amateur radios and modern CB radios. There are 2 versions of the mic - one suitable for CB and one suitable for Amateur radios. We will send whichever is suitable for the radio you specify. Supplied with 1 lead, wired to suit your radio. Extra leads are available (see below).• Selectable for 2 sets of transceivers at once by slide switch. • High Sensitivity Electret Condenser Microphone Element.

• High Quality Compressor Amplifier ( High - Low selectable ) built-in. It sends out constant and optimum level without distortion regardless of audio input level. • Equipped with FM/SSB Audio Quality Selector Switch for optimum operation. The Electret Condenser Microphone ensures clearer voice quality in FM position and better voice quality on SSB. • Non-Modulation Prevention Circuit built-in. After continuous transmitting for a few minutes, the alarm circuit will be activated with alarm sound for 30 seconds. Sertifikat na lentu signaljnuyu ostorozhno kabelj. Then, the condition returns to receiving mode automatically.

May 08, 2014  I have a JCD-201M Base Compressor Amplified Microphone w/ a 8 Pin plug I am selling it because I no longer own a Kenwood and my ICOM has a good mic that I like. It is a great microphone with a high sensitivity rate.

• Battery-Check Circuit built-in. Turn the power switch on ( by selecting 'FM' or 'SSB' position ), and the level meter indicates the battery condition with power voltage for a few seconds.] • Optional Foot Switch Optional foot switch can be plugged into the socket on the rear of the microphone for foot operated PTT. Amplification: High - 45dB Low - 35dB Manual Dual Microphone Connectors Output: • Output A 8 Pin Standard Microphone Plug Output B 8 Pin Standard Microphone Plug Front panel switch controlled. Meter - Dual Display VU (Volume Unit) Battery Indicator 1-1/2' H x 2' W Buttons: Output Select: [Out A] [Out B] [Out-Off] Compression Level: [High] [Low] [Manual] Manual Compression Control Knob: [Minimum] [Maximum] Mode: [SSB] [FM] [Battery-Check] Channel Control Switch: [Up] [Down] Key Controls: [PTT] [Lock] Output Voltage: Amplification - 0.3mv (Lapse) Variable Amplification: 0-70mv(Lapse) Output Resistance: 500 Ohm - 100 kOhm Batteries Required: 3 ~ AAA.

The following is an independant review of this base microphone, found during a search of the internet: Power amplified CB microphones have been around almost as long as CB. Originally, most price-point CB radios did not have enough microphone amplification to reach 100% modulation levels with normal voice. People added amplified microphones to give the extra talk power they wanted in a lower cost radio. As electronics improved and became less expensive, it is difficult to find a radio that will NOT easily hit 100% right out of the box. Still, amplified microphones are popular since are able to keep the mic a comfortable distance away from your mouth and still easily hit 100% or more. Some people over-drive the radio input with their amplified microphones to increase talk power.

Since radios have an automatic mic level limiter in them, this means that although you drive the audio harder than needed, the internal circuitry keeps the audio level low enough to prevent over modulation, but when you are quiet, will allow some of the quieter audio to pass through with nearly the same audio levels. This is essentially what we call ‘compression’ True audio compression works by trying to keep ALL audio at a certain level.

In this case, the level we are shooting for is 100% modulation. By increasing the volume on quiet speech and lowering the volume on loud speech, it is then possible to increase the AVERAGE audio level. Keeping an average audio level high is not as simple as it sounds. The recovery time of the limiter has to be fast enough to increase the level of soft syllables in a single work. Here’s why- Let’s take the word ‘paw’. The P is a sharp, high envelope sound, but the AW is soft.