[Elecraft] K2/100 Filter Question

[Brett gazdzinski]

You can just tweak the BFO settings I think, that's
what I did.
I did not have anything change with the kpa100, and I have
had the k2 back and forth as a K2 and a k2/100, and the filter stuff
did not change...

I have not had any long qso's, but in testing into the dummy load,
I don't find my heat sink getting very warm, let alone hot.

I was careful in setting the bias so that just the initial readings
were what I went by.

I set my fan to be on low all the time, its silent so why not?
Never had it go to high speed...

Brett
N2DTS

 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of David Fleming
> Sent: Wednesday, April 25, 2007 11:12 AM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] K2/100 Filter Question
> 
> 
> I noticed last night that when I change filters from FL1 (opt1) to FL2
> (700hz) in CW mode, the received signal shifts down in frequency by
> about 20Hz. Likewise, in CW-N mode, it shifts up by 20Hz. The 
> other two
> filters are right with FL1. The shift only occurs with FL2. I didn't
> notice this prior to installing the KPA100. I had the filters setup
> perfectly using Spectrogram, and all of the settings are just as they
> were after the initial setup. Will I need to go through the entire
> process again? Or is there a way to get only FL2 back on frequency?
> 
> Also, I assume (hope) that it is normal for the heat-sink to get quite
> HOT after a typical qso at 25wpm? Not spit sizzling hot, but 
> hot enough
> to where I can't leave my hand on it for more than a second or two. I
> worry that I don't have the bias set exactly where it should be. It's
> difficult to set the bias current accurately because the current rises
> so rapidly after entering TUNE mode. And the current at the very start
> varies depending on how warm the transistors are at the time - if that
> makes sense. Just a little paranoid. I don't want to fry my finals.
> 
> Thanks!
> 
> -David W4SMT
> 
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