KL203 Amp

[Jim Dickey]

Wow that is way too much radio for that little amp. Even with the RF power turned down all the way on 2950 it should still be at least 4-5 watts unless a golden screwdriver has been inside of it.

A bone stock Cobra 29 will overdrive it. Like you already pointed out you forget one time and "pop".

For safety sake, I would not run anything smaller than a 2 transistor bjt amp behind a 2950. That is too close for comfort in my book but I am sure the cheap cost is what is attractive. When I was in High School the Deer Hunter 100 was popular and was $99 sometimes as low as $79 if you did a group buy. I think they normally had 1 MRF455 or 2SD1446.No one put one behind a 2950 though.

It is never good to have to turn down to make it work or the proverbial suicide switch.

I never got why people would by a powerful radio then stick a tiny amp behind it. It is always better to design a system from beginning to end with everything designed to work together.

Lester does a lot of those radio's where they have an 8 fet or 4 bjt amp built into the radio with a suicide switch so they can turn that amp off and run a smaller amp? Why?

After I swapped in the 13n10s and a new American made relay, the KL203 I have has been taking 7w and pumping out about 160w while remaining cool as a cucumber on AM. The original RM3 mosfets in that amp are garbage. Spend 10 bucks on 4 new fairchild 13n10s and a new relay and relax. I smoked holes in 2 of the RM3s with a bone stock 980SSB in less than 15 seconds of modulated yakking.

 

[9C1Driver]

I sure hope you don't mean you are dead keying 7 watts into that amp.

 

[jon666]

i have one i never used i have lots of amps i have never hooked up. i have a nos klv 350 tube amp never even plugged it in. yes it runs on 110 volts just plug it in.