Robyn T240D the Executive “no receive” issue

[EVEREADY]

I just obtained a 240D and it TX fine but no RX. I found the problem to be with the CB/PA switch. Does anyone have a switch or can tell me how to bypass the switch? EVEREADY

 

[brandon7861]

Wow, that must be a big switch lol. Looking at the schematic, it appears to be at least a 6-pole dual throw switch. Unless someone familiar with that radio comes along, you may have to post a picture of the switch and maybe trace a couple wires to figure out what switch pins need to be tied together.

Could I make a different suggestion? Shoot a little of this up its back end and work the switch in and out a few times.

Edit: i have heard good things about deoxit too, which may work better here.

 

[EVEREADY]

Wow, that must be a big switch lol. Looking at the schematic, it appears to be at least a 6-pole dual throw switch. Unless someone familiar with that radio comes along, you may have to post a picture of the switch and maybe trace a couple wires to figure out what switch pins need to be tied together.

Could I make a different suggestion? Shoot a little of this up its back end and work the switch in and out a few times.
View attachment 76387
Edit: i have heard good things about deoxit too, which may work better here.
View attachment 76388

I’ve sprayed the switch with Deoxit but with little luck. Getting an intermittent receive but very unstable. Yes it is 6 pole double throw with dual stage. ( Bottom switch)

 

[EVEREADY]

I’ve sprayed the switch with Deoxit but with little luck. Getting an intermittent receive but very unstable. Yes it is 6 pole double throw with dual stage. ( Bottom switch)

 

[EVEREADY]

Actually Brandon, it’s a 9 pole dual throw switch.

 

[brandon7861]

I think, given the direction the switch moves, that the switches are laid out like this:

and if the switch being out is CB, you would likely have to connect these:

Maybe you could double check and see if those seem to try to make contact in CB mode before doing this.

 

[EVEREADY]

I think, given the direction the switch moves, that the switches are laid out like this:
View attachment 76395
and if the switch being out is CB, you would likely have to connect these:
View attachment 76394
Maybe you could double check and see if those seem to try to make contact in CB mode before doing this.

Thanks Brandon, I’ve ordered a Sam’s PhotoFacts, it will have the schematics and the alignment procedure, which I’m sure it will need aligning. Considering its age. Plus the parts list and identification of the different transformer cans. All tubes checked out to be 75% and better.

 

[Gman]

Using a DVM you can check continuity on the switch poles. Ive had many switches badly oxidized, and using contact cleaner, it actually took several minutes flipping the switch back and forth til it cleaned up internally and started working. Maybe this might help you.