Sears Roadtalker 40 SSB Mobile

[Nudget]

Hi All,

Looking for mods for Sears Roadtalker 40ch SSB Mobile, Model # 934.38260700, needs mods for AM Power, Modulation, Clarifier, and all orther mods available.

Thanks,

Nudget - Mike


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[fasteddy]

Mike, here is what I have from the Thomas Publishing Tune up manual Vol 1.

Modulation Cut D303 (not recomended by me<img src=http://www.ezboard.com/intl/aenglish/images/emoticons/smile.gif ALT=""> )

AM Power RT301

SSB Power RT 402

I do not have anything on a clarifier mod listed.

Hope this helps

fasteddy


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[K7DFA]

Here's all the "mods" I was able to find.
I assume no liability for the dissemination/use of this information!

Dale

SEARS ROADTALKER BASE/MOBILE

1)Open the radio and you will find a metal case around the pll chip.unsolder this. 2)Cut the trace around pin 9 and 8 . 4)Solder a 4.7k resistor from pin 8 to ground. 5)Install a 6 posistion/ double pole rotary swicth in the radio.then run wires (the red lines) from the switch posistions to the locations on the pc board. 6)Solder a 1n914 diode from pin 1 to pin 4 on the switch. 6)Solder a wire from pins 2A to 3A to 4A to 5A.

Adjust t302, the VCO,so that the radio will TX/RX on all the extra channels. HINT:USE A PLASTIC TUNING TOOL TO MAKE THIS ADJUSTMENT OR YOU WILL BREAK THE COIL!!

POSITION 1

Channel 1 to 40 is 26.485 to 26.925

POSITION 2

All the regular CB channels

POSITION 3

Channel 12 to 27 is 27.425 to 27.595

POSITION 4

Channel 1 to 40 is 27.605 to 28.045

POSITION 5 AND 6 will give regular CB Channels

CLARIFIER MODIFICATIONS

1)Find the green wire coming off the FINE TUNING control.Follow the wire to the pc board where it connects and unsolder it.
2)Find the RED wire behind the meter display and solder it to that location(there is 8VDC there)
3)Find the BLACK wire from the FINE TUNING control and unsolder it from the PCB.
4)Solder this wire to PC GROUND .
5)Find the PURPLE wire from the FINE TUNING control and unsolder that from the PC board.
6)Solder this wire to the point on the PC board where R303 and the cathode,the end with the band around it! , of D301.


This mod will give you about 3khz up/down off the "channel".
If you move the clarifier and the radio "drops out" you will need to JUMP d301 and put the purple wire back to where it was.

 

[Captain Kilowatt]

Just a shot in the dark here but my guess is that after six years since the last post he is not still waiting for the info.

 

[tecnicoloco]

Just a shot in the dark here but my guess is that after six years since the last post he is not still waiting for the info.

op:

 

[killapits]

will that work on a plain 40 channel roadtalker i love my radio

 

[skeletor669]

where do i find the d303 in this radio

 

[Carl]

what model do you have, look at the tag on the rear and tell us what it is.

there were quite a few different roadtalkers, you radio may not have diode 303.

 

[Kruser]

Information still needed

op:

It may be late for the original asker, but I was looking for it and found it here. So the post is still a good one. I didn't see a reply to the guy with the straight 40 channel. That is what I have. My model is 934.38110700 and was wondering if that information was still out there about the non-sideband rig.
Kruser

 

[Double R]

I own sevel of these radios there alsome i have a base and tons of mobiles , i have one road talker that has , a cobra 29 board in it depending on your i could tell ya the board PC-221AD is a uni-dean board whitch is a cobra 29 , ya might be-able to mod it like a cobra 29, that just the am one i also have a base which does side band and a 100 other things , the mic i use on its a turner plus 3 which works great sounds great to.

 

[Robalo]

Bump what ugly thing I just got it

 

[jnewcs]

Bump what ugly thing I just got it

lol, ttt.

I just got one of these and am comparing it to your images. Thx BTW! Awesome! Is the pictured radio stock(if you remember)? I am seeing a couple things missing on mine that yours seems to have. Either way, thanks for the pictures.

 

[doffo]

Another moment for......... Riiiiiiiiise from your grave.........


But yea. The radio works pretty good. I recently posted about doing the clarifier unlock with pictures in a post I think it was either last year or the year before. The only thing I dont like is when you key up, the audio slowly rolls in coming from your mic. (I assume old capacitors, but I haven't tried my other 4 I have to see if it is due to old capacitors.)
Receives great and the audio TX sounded good. Hitachi boards worked well.