[Elecraft] KPA1500 LOW GAIN FAULT

[Ed gilliland]

Hi Vic, thanks.

That's the first thing I tried, should have included my checks in the 
first message.  Here is what I've done so far.

Put a dummy load on the antenna 1 port

Confirmed that the amp was on antenna port one

Checked the SWR between the K3 and the amp 1.1 without the K3 tuner

Re-seated all the cables on the KPA1500 rear panel

Tried the amp again and it works.  I have no idea what cable fixed the 
problem.  I am using a back to back cable between the K3 and the KPA1500 
AUX ports but it's been installed for months and I've experienced no 
problems.  We'll find out in tomorrow's CWT.  I think I'll run the amp 
at 900 watts until I gain confidence.

WOW! WHAT A RELIEF!

Ed



On 4/30/2019 01:21, Vic Rosenthal wrote:
> The first thing to do with any amplifier failure is to try it with a dummy load. If the problem still occurs, you can rule out SWR or RF feedback problems. It doesn’t seem like any of the above if it occurs on all bands, but it’s easy and a good start to a systematic diagnosis.
>
> Victor 4X6GP
>
>> On 30 Apr 2019, at 5:35, Ed gilliland <w5tm001 at gmail.com> wrote:
>>
>> My KPA1500 is faulting with a low gain alarm ration 6.  This is with 23 watts input 160-10 meters.  Any advice?
>>
>> Thanks, Ed W5TM
>>
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