Cobra 29 LTD CB Radio - Page 5 - Answered Questions & Fixed issues

radio shack

use a cigarette lighter plug ,its safer.

I think its vr6 in that radio but you have to turn it till you hear noise. did you use a signal generator to set the squelch?

do you have it on calibrate?

if you are talking about the reverse polarity diode its there , right by the power wires that come into the radio. way in the back on the R.H. side.

if you replace it without fixing the problem , well , you sort of still have the problem.

why remove it fix the problem.

s w r not matched properly

polarity protection diode near power input burnt.

what kind of radio did you have it wired for. Some 4 pin mics are wired alike and others may be different .

keying diode in front of radio check all 4 and you will find the one that is blown. Then replace them all.

good luck

sounds like a keying diode

is it used? if so it may have been hacked for more channels and no one finished the work.If its new send it back to cobra .its under warrenty

did you install it correctly? the base ,emitter and collector may not be in the same order on the erf210 as it was on the one being replaced.check it out I'll bet they are reversed.

ok .ther is no pot per say ,But if you are wanting to turn the dead key down you can adjust the choke at L14 . that will bring up or down ,but only by 2 watts .

you have high SWR on antenna .get the ant. tuned or go to a cb shop and have it tuned .i'm hoping it is on a vehicle .if its a base ant. you need to tune it.

find a friend with the same radio and match your wireing up to his

yes but you will never know if you adjusted it up or down

you need a signal generator that costs more the radio you want turn the squelch up on.If its a one time deal its not worth it.If you intend on repairing radios then you will have a headstart. you need a service manual.the manual will tell you which vr to adjust.