[Amps] issue with AL-1200 output

[Jim Thomson]

Date: Fri, 23 Jun 2017 06:09:22 -0400
From: TexasRF at aol.com
To: steve at nr4m.com, amps at contesting.com
Subject: Re: [Amps] issue with AL-1200 output


<Steve, this sounds like an output padder C that has lost ESR and heats up  
<with power applied. Heat will cause the capacitance to change. Many 
<amplifiers  use large value capacitors which are known to develop this problem over  
<time. If this is the problem, lowering the power output will take longer to 
<see  the power drop.
 
<73,
<Gerald K5GW

##  He did not say what band he tested on.   Any loading cap padder would be on the 160 + 80m bands. 
He might want to re-run the tests  on 40 + 20m..... if its fine on  40-10m, then its 99 % likely to be a padder
on the lower bands. 

Jim   VE7RF