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When a combiner resistor smokes one stage is producing more power than the other,this is what causes the resistor to get hot. you have 2 100 ohm resistors on the combiners where the 2 transistor stages are being tied together,which one of these is getting hot? also check your 10 ohm swamping...

Smoking combiner resistors show an imbalance or usually a blown rf transistor

:thumbup1:

10db gain and very high current draw is fairly usual for that style ampifier on 13.8v even in class c, they are designed to run on 20+volts on cb keydowns, adding the shitty biasing circuit they use causes them to become less efficient and a poor impedance match, der Verstärker ist richtig nicht...

My thread was locked because of crybabies:sad:

He has improved tuning and cooling in several ways over DaveMade amplifiers Works for RCI doing warrenty work,they send him a crate of 500 radios at a time RCI sent him to ASIA to train him and show him the factory He has 10,000 2879's in a safe deposit box with his name on the pills His new...

I choose mine cause ampower is so famous:bdh:

K-MART:blink:

as usual,you dont even have a clue:pop:

Theres no doubt the wilson 1000 will kick the k-40's ass,i found that out myself.next mobile antenna im trying is the sirio 5000,the stinger length is longer than the wilson and i think it may outperform it.

Disagree all you want,thats what forums are for.I bought one years ago and had to replace the coil every few weeks to a month because the coil cracked at the top and filled with water.Didnt cost me anything because it had a lifetime warrenty if i remember right.also had to warrenty the cheap...

From a performance standpoint,i would say K-40 antennas are made by K-MART in china:ohmy:

as far as i know its called a dc connector,one of these places might have it The Best Source for ALL you Bird Equipment Needs Including Bird Electronic Corporation 43 wattmeter elements samplers slugs watt meters wattmeters 4314B 4314 4381 4391 4391A 4410 4410A APM 4308 4431 4304 4304A 4308A 43P...

i approve:thumbup:

my thoughts exactly

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heres a patent for a constant voltage/constant current bias supply Dual (constant voltage/constant current) bias supply for linear power amplifiers - Patent 6922107

this?

some good reading here VHF/UHF Long Yagi Workshop

exellent radios to practice soldering on !:ohmy: