[Elecraft] [K1] K1 Low power, Suggestion to increase output power

[Marc PE1FJN]

Hello Rick,

HNY2010.

When I had output power problems at 15m, not at 20m, I increased the output
power by 'tuning' the low pass output filter (L9/L10, L11/L12), suggested by
ELECRAFT. By bringing windings together I was able to get the required
output.  It does not look as nice when having the windings evenly spread,
but in the end the output power is more important. 
Make sure you have a dummy load when checking Pout, as when VSWR is poor,
depending of the COAX length you will see high or low max output power on
display K1. Reason: K1 is measuring Vpeak out, and calculates it back to
power. So reading on display is only reliable when you have 50ohm, or have
installed the internal antenna tuner.

Also make sure you have 13.8V, Pout max between 12V and 13.8V makes a
difference. I run it at 12V, Power is 5W at 15m/20m band, while running at
13.8V I can easily get up to 7Watt. For me 12V is fine. 

If tuning of the coils does not work, contact elecraft support, and refer to
power problems from PE1FJN October this year at 15m SN: 2761. I changed 1
resistor on instructions from ELECRAFT. At this moment I have now no access
to this mail(sorry), but I'm sure you will be able to get the same
instructions. Having changed this resistor power was very fine, and not
marginal anymore. 

Hope this helps,

73
PE1FJN
Marc
K1 SN:2761

PS: Good Luck, at 20m DX is really nice with this RIG.
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