• 126 Answers SOURCE: This procedure is not as simple as just cutting a wire. Note that you can possibly mess your radio up if any maintenace is not done properly. I do suggest taking your radio to a proffesional to have the talkback removed, but, if you really want to do it yourself, go to ghe following link and basically reverse what has been done. This is the service bulletin for the addition of talkback to the Cobra 150GTL DX and the Cobra 200GTL DX.

As long as the talkback was added correctly, this can be put back origional. If this does or does not help, please reply on here or email me at. I look forward to hearing from you.

Dean Rollin CBs Mt. Vernon, TX Posted on Feb 14, 2008.

It didn't work good in manual mode when using the mic gain on the base - although it would drive the radio well, it just didn't have any 'punch'.

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. How to view epub thumbnails in windows explorer. 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. Then, the condition returns to receiving mode automatically. • 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.

4g modem 827f mts proshivka tv. 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. If you say the word ‘paw’ into your CB radio with a stock mic, the audio level output might look something like figure 1. Notice how the sharp ‘P’ sets the audio limiter into motion, which lowered the radio audio level sensitivity so the quick rise of the P did not over modulate the transmitter. After the loud P passes through the circuitry, when the ‘aw’ comes through, the audio is still very low, and the radio ‘talk power’ is also low Now, let’s speed up the recovery time a bit and say ‘paw’ again. Figure 2 shows what the audio level sensitivity would look like with a very fast recovery time.