The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Hi guys , I recently aquired an old realistic trc-423 mobile I have tried everything to get this old set to key up. I have re-wired the mic end and tested mic with ohmmeter everything in mic is ok, it worked on another set. So I tried jumping the tx pin directly on the radio with no results no tx lights. There is also no audio on the PA when testing mic any ideas?

Check the radio in the PA mode.

I checked and there is no audible audio in PA mode with vol wide open. It doesnt even feedback the only thing i got is rx!

Sorry I did not read all your first post.

Do you have any RX audio?
Is any of the LEDs in the bargraph working?
What is the voltage at transistor Q505, and Q506 in RX and TX?

Yes there is RX audio,No there are no working LEDs on the bargraph . Which leg on the transistors do i check for voltage, on collector emitter or base?What should i see for Volts? If the voltage is lower than normal should i replace transistors Q506 and 505? Thanks.

hey i found a little tin box filled with wax and guess what i was dumb enough to try digging the wax out with the radio on, and bam more RX audio vol, so i kept playin and found a cold solder joint under the wax now everything works fine lol tks for all the help.