Black Book Of CB Linears?

[V8Vega]

Does anyone have this book? I'm thinking about buying it, but I want to make sure it not only has the schematic, but also has the parts list for my Thunderbolt 305.

 

[office888]

Small world.

I know the guy who wrote that book.

 

[fnkycoldmedina]

lou franklin??

 

[V8Vega]

lou franklin??

Ken Touhey.

 

[fixer]

The 305 isn't listed in it.

Fixer

 

[V8Vega]

The 305 isn't listed in it.

Fixer

THANK YOU! I would have been really upset if I had spent the $25.00. I called Ken's shop, but the woman there could not answer my questions.

 

[KJ6KQE]

There's no parts list, but here is a schematic:
Thunderbolt 305

 

[V8Vega]

There's no parts list, but here is a schematic:
Thunderbolt 305

Thanks...I have that schematic, but am not educated in electronics. The variable power pot doesn't work anymore and I want to replace it with a rotary switch that will accept the stock knob to keep her looking mint. I was looking at this switch, but am not sure if it is suitable for this application. When I find a switch, I will then try to figure out what resistors and other parts I will need for the Hi/(Med?)/Lo output.
Switch: ROTARY SWITCH ,3P3T , NS - eBay (item 220685418372 end time Dec-18-10 18:45:24 PST)

 

[paws264]

Thanks...I have that schematic, but am not educated in electronics. The variable power pot doesn't work anymore and I want to replace it with a rotary switch that will accept the stock knob to keep her looking mint. I was looking at this switch, but am not sure if it is suitable for this application. When I find a switch, I will then try to figure out what resistors and other parts I will need for the Hi/(Med?)/Lo output.
Switch: ROTARY SWITCH ,3P3T , NS - eBay (item 220685418372 end time Dec-18-10 18:45:24 PST)

For someone who is not "educated in electronics", the repair/ modification that you want to install is kinda like re-inventing the wheel but, when you get finished, your "wheel" will not be round.

I would strongly recommend that you find a 10,000 ohm (10 Kilohms) potentiometer and replace it as the circuit was designed to operate.

The 10K pot acts as part of the Grid-leak / bias resistor system for the driver tube; to replace that pot with fixed resistors, you would have to at least temporarily install a variable resistor (pot) and measure the values where the wattage output is where you want it for "Hi-Med-Lo". Then, you would have to de-install the pot and put the switch in with the resistors hanging off of it; is it worth it?

I believe that the ability to control your amount of output in a variable manner is much better than the "I'm gonna flip the switch and go to the 'Next' stage" concept.

However, YMMV.

.

 

[office888]

Ken Touhey.

Bingo.

Very knowledgeable guy to talk to.

Sadly, old age doesn't let him work on electronics anymore.

 

[V8Vega]

I would strongly recommend that you find a 10,000 ohm (10 Kilohms) potentiometer and replace it as the circuit was designed to operate.

Somebody recommended that I use this one and cut down the shaft. I guess that's what I'm going to do. I hope this pot lives longer than the POS that is in this thing.
10K-Ohm Linear-Taper Potentiometer - RadioShack.com

 

[Toll_Free]

Shame on that 25+ year old linear's pot going out!

 

[V8Vega]

Shame on that 25+ year old linear's pot going out!

The thing has had virtually no use! It's as if it went bad from sitting if that's possible.

 

[KJ6KQE]

The thing has had virtually no use! It's as if it went bad from sitting if that's possible.

I see some electrolytic caps in the schematic. Those do, and probably have, derogated just by sitting.
Good luck with your project!