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

Yes he is the man, I'd be lost without him.
Dave.

Rob98,
Yes but you could buy a new radio for what it would cost you.
Dave

Chevin,
The codes shoud be the same for the Jacko as the Cobra 15 to 59, all Uniden channel switch codes are the same for SSB/AM/FM radios check it out to make sure.
Dave.

Chevin,
The codes shoud be the same for the Jacko as the Cobra 15 to 59, all Uniden channel switch codes are the same for SSB/AM/FM radios check it out to make sure.
Dave.

Chevin,
What's the problem with the one you have or don't you have one at all, I've repaired and rebuilt many of them.
Dave.

Rick,
You need the SAMS number 212 schematic.
Dave.

Thanks Rick you make it look so easy.
Dave.

Yes the transistor is on the front panel, it's the only none surface mount transistor on that board and it's in between two of the switched and soldered both sides of the board. I'd leave it the way you have it.
Dave.

Yes I've done the job and if you feel confident enough to do it go ahead, it's the only none SMC on the board but it's in a very tight position to get at and it's soldered both sides of the board. The later radios have a small heat sink on the transistor to try to keep it cool. It is not an easy job...

Ron, If the front board is the PTSY016AOX then this will unlock the clarifier to a KC shift. Remove D5 and R26. Connect the unused clarifier pin on the control to a 10k resistor and connect the other end of the resistor to the emitter of Q44 the regulator. D7 is the varactor diode by adding a 5.6uH ...

Ron, Most people want the radio to display 1 to 40 on all the bands you're the first one to want to put it back to 41 to 80 on high band. You should find the wires comming from the band switch, they will have been removed from the channel switch and one of the solder lands they came from will have b...

Ron,
That could be the PLL or a bad connection at the channel switch pins to the PCB but I'd change the PLL first.
Dave

Ron, You have got the radio on FM haven't you with the switch pulled out for FM and in for AM. If your not in the correct mode it will sound off frequency. They are easy to adjust on that rig, each crystal has it's own adjustable capacitor next to each crystal on the sub board front left hand side o...

Cymro, Welcome to the forum. It would help if you told us what radio it is. Moving a radio that far from what it was original designed to work on is asking a hell of a lot for a CB. If the radio has a clarifier or a kC shift then you would be able to adjust the frequency between the 10KC's of each c...

Welcome to the forum Skybolt,
What PLL has it got in that radio, and have you got the board number ?.
With the correct numbers for both you'll get the right mods for your radio
the first time.
73's

Scott, I think you'll find the answer is to turn the FM deviation down a bit and use a power mike. It may just solve the problem on AM as well. As you know we don't use AM in the UK so i've never had that problem. But i must say that type of radio the 125 and the 001 boards sound much better on all ...

Scott,
Tell me about it, when i eprom a cybernet ssb radio that's the first thing i do,remove that diode and take 5v from the 7805 i fit for the eprom.
It dont go again.

fastuart,
Just had a look at a scrap board,D1 on the main board is the zener diode for the PLL it's a 5.1volt device.
Check that out for 5v because without 5v the PLL wont work, no TX or RX.

It could be the PLL, or Q30 back right hand side bolted to the chassis it's a darlington transistor 2SB837 or 11?? cannot remember the number, or Q36 it has a bit of aluminium bolted to it. if you look on the back (track side) of the board you will see the screen print for all the transistors and di...