Tim,
The bandpass filter alignment for 80/160 meters is a compromise. The peak
at 160 meters does not allow full 80 meter power out, and vice-versa. Set
the slugs for about halfway between the 160 meter peak and the 80 meter
peak.
If further adjustment is required, balance out the settings on 160 and 80
meters so you have about the same output power in both bands -- BTW, you
should be able to easily achieve at least 10 watts output, most K2s I build
or work on will produce 12 to 14 watts on both 160 and 80 meters.
73,
Don W3FPR
----- Original Message -----
This may be normal, but wanted to check if others see a slightly reduced
power output at the high end of 75m after installing the K160 module.
After peaking L3 and L4 on 160m per the instruction manual, I notice
that on 80m around 3.5Mhz, when the K2 power is set to 10w, I can only
get about 9w out...and then at 3.99Mhz, I only can get about 8.5w out.
Not sure if this will matter since I'm now building the KPA100 and will
at most times be driving an amp at 60 watts from the K2/100, but curious
to see if this is normal or if there some other tweaking I can do to get
at least 10w on 75/80m when running without the KPA100.
At the same power setting I get at least 10w out on all the other bands,
including 160.
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