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They all use the same...TA7222ap

6 pin plug? I would expect to see a DIN plug on it... Did the origonal mic that came with it have "up / down" buttons on it or any other controls? If this is just a cb I can't see any reason why it would need more than 5 pins unless it had some other control functions.

Please people... IT WAS AN EXPERIMENT TO LEARN FROM!!!!!!!! I don't plan on keeping it clipped. I only removed one leg of the diode from the board to SEE WHAT IT DOES FIRSTHAND!!! As soon as I get the radio back up and going I am putting a resistor in-line with that diode to get full modulation...

Alot of those old 23 channel xtal rigs are still great.... great recieve... decent power.. modulation.... and about 2 pounds of solder LOL. The recieve on some of those old rigs really surprised me. Everything from the board, resistors and components in general were built solid and could...

Do you have PA? Its possible that the audio IC is gone..... but check the PA by hooking up a speaker and see if you get any audio out. If you have good audio power, the audio IC is OK. Check the work you did on coil L14... its at that point that the recieve input comes into the radio...

I'm not familiar with that exact model..... what kind of radio is it and what kind of features does it have? Like is it a ssb radio? Or just AM?

I remember years ago someone at some website was showing off the inside of this Cobra 29 that was some super heavy duty performer..... some kinda of keydown radio for the barefoot class or something like that. He had all those coils spread so far they looked like a big "U" shaped piece of wire...

Cool.....945 transistor.... yea theres lots of those little guys used in radios. Dam little switching transistor giving you grief LOL. I didn't do to much to help you out.....you did all the work and tracking. Take care

Not sure about the talkback... I've never worked on one of these radios. But the issue of more power on the 10 meter band than the 11 meter band is just in the rf amp. The radio's rf amp is more than likly just tuned for a higher frequency... its most likly tuned for center of the 10 meter...

The audio IC should be OK.... that radio uses the same audio IC for recieve audio that it does for AM audio. So if your getting good RX audio... the line from the rx'er to the audio IC to the speaker is good and has no noise problem. This means the problem is JUST when the audio IC is being used...

OK.... you will have 1 pin on the audio ic that is the audio in... .... unsolder that leg of the audio IC... key the mic and see if you have any noise... if you do the noise is coming in through AFTER the audio IC Do you have this noise when recieving in AM? or is it just transmit audio...

OK cool..... now rule out the audio IC and the mic Get the radio to TX without a mic and check if its still there. Remove the power to the audio IC and check the same.

Actually no.... I don't know the guy who posted the origonal message besides the fact that he is somewhat new. He origonal post says " the new one I keep reading says you get the illumate panels". I had to wonder (since I don't know this guy) if he thought the whole front panel would...

check your power supply.... the noise could be a 60 cycle humm coming through.... the variations in carrier power could also be due to a power supply voltage problem. It could be a few things... first thing to check is the power supply.... I could have sworn I replied to this thread...

A few things to check.... Check where that S meter light is getting its voltage from... thats a hint if its flickering... its telling you that its not getting a steady voltage. Check the voltage at the audio IC.... If you have good modulation/swing the audio IC might not be the problem...

Make a converter yourself.... get an old mic cord and cut a small piece of it...a 5 pin mic jack... a 4 pin mic plug... a little heat shrink and the pinouts for a 4 and 5 pin mic.. solder away. Or if you really want to get creative..... you could put BOTH a 4 pin mic plug AND a 5 pin mic...

The majority of cb channels are 10 khz apart... for example channel 1 is 26.965... channel 2 is 26.975. Alot of the channels go up or down in 10 khz ( 10 kc or 10 kilocycles... its all the same). But there are some channels where there is a 20kc jump between them. Between channel 3 (26.985) and...

Hows the power supply? Got any voltage fluctuations? 60 cycle hum? If I were to guess, without any more background info,... I would say the problem could be in the power supply. You have what kinda sounds like a 60 cycle humm coming into the radio. That and you also have deadkey...

The display pannel actually doesn't glow if thats what you thought it did. What it will do is make the green lettering on the radio easy to see at night. The whole front pannel doesn't illuminate..... when you adjust the Dim... it will make the meter light and channel display bright and dim...

LOL..... yea if your just going to use the stock mic you can clip it if you want. Good advice as usual Switch.