>
> Brett,
>
> I agree with Tom - that you should re-peak the bandpass
> filters at low
> power (1 to 2 watts) It is easier to discern the peak at low
> power and
> there is lesser chance that the K2 power adjustment mechanism
> will try
> to compensate and confuse the response.
I tried that.
I did it at 1 watt, no real change.
>
> Be certain to observe the correct band order for doing the bandpass
> filter alignment - for any band pair, you must adjust the inductors
> first and then the trimmer caps. Do 80 and 40 meters in any
> order, but
> align 30 before 20, 15 before 17, 10 before 12. If you have
> the K60XV
> installed, 40 must be aligned before 60 meters. 160 and 80 share the
> same inductors, so you may have to compromise a bit between them, but
> that filter is broad and there is plenty of reserve drive on those
> bands. On 10 meters, you may find better coverage across the 28.0 to
> 28.8 MHz band if you do the alignment at 28400 kHz rather
> than the 28200
> mentioned in the manual. But if your main 10 meter interest
> is CW, use
> the 28.2 point.
I have been doing it that way (by the book).
I have no idea what is on what band, and when they are open.
I have been stuck on 80 and 40 meters weekend mornings for the last
15 years or so, I have checked out 20 and 15 meters at night with the K2
and there is nothing there, so I suppose they are more daytime bands?
>
> Since you said you have a 'scope, you will find it easier to
> watch for
> the peak on the scope trace than to wait until the digital display
> settles down. Just connect your 'scope's 10X probe across the dummy
> load. Connect directly to the dummy load with a short connection for
> the best results.
>
> You will be able to see the RF voltage peak on the 'scope
> easily. You
> are not trying for any specific voltage, just for the point
> of the peak.
> If you do not use the 'scope, make the adjustments slowly to give the
> digital display time to respond.
>
> After peaking the bandpass at low power, you can re-check the
> max power
> output if you have any real doubts about it.
I think I am real close to maximum I am going to get out of the rig
without changes, and I am fine with 10 watts or more on most
bands, 10 meters is about 8 watts, I might try removing one turn
from L21 and L22 as a test.
Thanks,
Brett
N2DTS
>
> 73,
> Don W3FPR
_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help:
http://mailman.qth.net/subscribers.htmElecraft web page:
http://www.elecraft.com
Locked
