[Elecraft] [KPA500] Reduced band sensitivity when in OPER

[Chris Johnson]

OK I just reread my initial email and realized I typoed that wrong.  Obviously I have the KAT500 after the amp.  :)  LOL

> On Sep 9, 2015, at 6:02 PM, Chris Johnson <elecraft at ozy.us> wrote:
> 
> Hmm.  I figured it sounded like something not-good.   The setup hasn’t changed in years, so there isn’t a configuration change in play here.
> 
> I’ll give them a call tomorrow unless they pipe in here.
> 
> Thx
> 
> Chris
> K6OZY
> 
>> On Sep 9, 2015, at 5:45 PM, mcduffie at ag0n.net wrote:
>> 
>> On Wed, 9 Sep 2015 17:18:33 -0700, Chris Johnson wrote:
>> 
>>> I just noticed that if I flip my KPA500 into OPER, the band sensitivity drops by a huge amount.  I have a KAT500 between it and my rig.  If I flip it back to STBY, the band reception is back to normal.   The amp still puts out power according to the W2 that is after it.
>> 
>> Sounds like a probable bad PIN diode.  You should see minimal change.  I show
>> one db change in audio level on WSJT on six meters.  Check with E-craft on
>> troubleshooting the diodes and see what they say.
>> 
>> Gary
> 
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