[Elecraft] KX1 low transmit power with KXB3080

Bruce Grubbs mail at brucegrubbs.com
Wed Apr 19 19:35:08 EDT 2006


I finished the KXB3080 adapter today. Receive seems OK, but transmit power 
into a dummy load is only about 0.2 watts on all bands. (It was about 3 watts 
with the KXB30.)

I suspect a short somewhere because Q6 gets hot and TX current drain is above 
normal at 850 mA, but I'll be darned if I can find it. The voltages at Q1, 
Q4, Q4, Q5, and Q are normal.

I;ve also done the mod to increase the L3 windings.

I'll have a fresh look in the morning, but meanwhile, has anybody else seen 
this problem?

Thanks es 73,
Bruce
N7CEE



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