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

[Rick/WA6ES]

Marc
  Well I worked on the winding spacing and got it up to a little over 4
watts, actually 4.4, so that did help. I sent off an email to Elecraft
yesterday when I posted this and no answer yet, maybe I will call them and
talk to Scott there. I have to get a couple of speaker slides, heck those
things are small! I even played with the 40m section and got another watt
out there also!
Can I live with 4.4 watts on 20,maybe, but if I get more pwr out, even
better.

Thanks again for the info
Rick/WA6ES


Marc PE1FJN wrote:
> 
> 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.
> 

-- 
View this message in context: http://n2.nabble.com/K1-Low-power-tp4248493p4253616.html
Sent from the [K1] mailing list archive at Nabble.com.