[Elecraft] KAT100 Problem

[Don Wilhelm]

Dick,

It is very strange that the K2 would have a problem like that on only 
one band.  Does your KPA100 have a shield over the speaker magnet?  
About the only thing that I can think of is that the speaker shield is 
missing and its magnetic field is interfering with the operation of the 
VFO Range Select relays on the K2 board below it.

Other than that, my only other guess is that something has happened to a 
capacitor in the 17/20 meter LPF in the KPA100 or in the 20/30 LPF in 
the base K2.

If you operate the K2/100 directly into the dummy load, do you get full 
output?

73,
Don W3FPR

On 7/8/2013 1:07 AM, richardjwiltgen at aol.com wrote:
> Don,
>
> I had been trying that to no avail.  I drew up a a table with the data for all the capacitors.  After that, I decided to pull out an LDG-100pro to see what would happened.  Much to my surprise, I found out that I had been barking up the wrong tree.  The LDG responds the same way.  Both the KAT100 and the LDG fold back to 10 watts when tuning on 20 meters, regardless of whether I am using the antenna or the dummy load.  The problem is obviously in the radio, not the tuner.  It threw me for a loop because all the other bands tune up just fine.  I never would have guessed the problem was in the K2/100.  If I can't figure it out in the next couple of days, I'll just have to leave it for next fall when I return to Florida with decent test equipment.  I have been sitting around waiting for some physicians to  approve my departure.  If I had known this a couple of weeks ago, I would have had plenty of time to work on it.  I really like the K2.  In many respects, I like it better tha
>   n my K3 and KX3, as it fits better with my "CW back to basics" personality.
>
>