• You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.

Sears RoadTalker 40 SSB Mobile

SuperDave

Active Member
Sep 10, 2012
157
9
28
Luling, La.
Just found an old Sears RoadTalker 40 SSB Mobile that was in a closet at my parents house back in Georgia. It works, but cosmetically it looks ruff. Has a Realistic desk power mic. Hooked it up to my old di pole antenna in the attic and it still works. Channel knob is a little funny, but got a great report on the first radio check.

Are there any modifications I can perform on this thing?



Sears RoadTalker 40 SSB Mobile
Model Number: 13005720
 

Found some info on it... this thing is stout and has some serious modulation.
It blows my trc-465 away.


Does anyone on here have one?

First thing I'd do is clean each switch and knob with contact cleaner switch all the switches and knobs than turn all the knobs back n forth let her dry. Than give it a good tune with a station monitor...

☆ ★Sent from Droid★☆
 
First thing I'd do is clean each switch and knob with contact cleaner switch all the switches and knobs than turn all the knobs back n forth let her dry. Than give it a good tune with a station monitor...

☆ ★Sent from Droid★☆

Ok. Ill try to find some contact cleaner tomorrow. I don't have anything that is safe for electrical parts I don't believe.

Station monitor? Such as some one listening to me on the other end while I tune?


Also I couldn't find much of anything on this model radio. Only the slant face that every seems to like. :blink:
 
Ok. Ill try to find some contact cleaner tomorrow. I don't have anything that is safe for electrical parts I don't believe.

Station monitor? Such as some one listening to me on the other end while I tune?


Also I couldn't find much of anything on this model radio. Only the slant face that every seems to like. :blink:

Sorry station monitor is a scope.

☆ ★Sent from Droid★☆
 
Sorry station monitor is a scope.

☆ ★Sent from Droid★☆

haha, its ok. I don't have a scope. I'll just use it as is for now. I may mail it off and have someone look at it and fix it up.


I still figured someone would have chimmed in on the radio? I guess it wasnt a very popular SSB radio.
 
haha, its ok. I don't have a scope. I'll just use it as is for now. I may mail it off and have someone look at it and fix it up.


I still figured someone would have chimmed in on the radio? I guess it wasnt a very popular SSB radio.

Post a pic i wanna see it! I have 2 mobiles, one is a base mobile slant face the other is basically a Cobra 146GTL.
 
...................

Could you pull the bottom cover off of the radio, and take a snapshot of the inside for me, so I can identify the board? Do that for me and I can assist you with mods as needed. Thanks!


Yup, I can do that!

I guess I shouldn't have said it was completely stock.. I turned up the Modulation, got it swinging around 18 or so watts on SSB and AM. I set the DK on AM for 5w.

I got these from Loosecannon in another thread...


"VR1-this is your S-meter control. it sets the "receive meter" at the correct level. dont mess with it.
VR2-this is your squelch range. it sets the level at which the squelch "breaks". dont mess with it.
VR3-this is your transmit frequency control. it sets the frequency you transmit on. only mess with it if you have a frequency counter.
VR4-this is your carrier balance. on SSB there is no carrier or "deadkey". meaning the radio only puts out power when you talk. this adjustment makes sure there is no power coming out of the radio unless you talk. to set it correctly, set your meter on "power" or "watts", turn the mic gain all the way down, key the mic, and adjust this pot for MINIMUM power out. when set correctly, the meter should not move when you key the mic.
VR5-this is your AMC (automatic modulation control). this is the one you adjust for more modulation. most people just turn it all the way up and then use the external mic gain control to adjust mic gain.
VR6-this is your ALC, or SSB power control. set it for about 12-15 watts on your wattmeter while saying "ahhhh" into the mic.
VR7-this is your RF meter control. it sets the "transmit meter" on the radio to read correctly. it has nothing to do with how much power you are actually putting out, it is just a meter adjustment.
VR8-this is your final bias control. the service manual will tell you where to set it, but unless you already messed with it, or you see its turned all the way one direction; dont mess with it.
VR9-this is your driver bias control. same goes for this one.
VR10-this is your AM power control. it sets the deadkey where you want it. set it for 4 to 5 watts. no more"


~Cheers~

Well guess what thats my video on Youtube!!!! Thats my Sears mobile!
 
Could you pull the bottom cover off of the radio, and take a snapshot of the inside for me, so I can identify the board? Do that for me and I can assist you with mods as needed. Thanks!


~Cheers~

For a grumpy, cranky repairman, you sure help people out a lot! (y) Very cool, ExitThirteen.

73,
RT307
 
If it's confirmed that it is indeed the D2824 PLL chasis, I have several mods for it. Clarifier unlock, minor upgrades, extra channels, etc. Let me know.


2RT307,

I'm considered in some circles by being the "grumpy, cranky repairman" because I can sometimes get twisted up when I get something across my bench that's had the ol' "Golden Screwdriver" stuck in it. Removed modulation limiters, bias adjustments cranked wide open, volted finals, and botched clarifier unlocks and channel mods make me grumpy and cranky. :tongue:

~Cheers~
 
  • Like
Reactions: NZ8N and Zman

dxChat
Help Users
  • No one is chatting at the moment.
  • dxBot:
    Tucker442 has left the room.
  • @ BJ radionut:
    LIVE 10:00 AM EST :cool:
  • @ Charles Edwards:
    I'm looking for factory settings 1 through 59 for a AT 5555 n2 or AT500 M2 I only wrote down half the values feel like a idiot I need help will be appreciated