[Elecraft] KPA500 Died

[Jack Brindle]

Ooh. Well, I hope it wasn’t punishment for “bending” the NAQP rules:
"No greater than 100 W. Use of external amplifiers capable of more than 100 W output is not allowed."
And yes, my KPA is not running while I play in NAQP...

OK, so please send me a copy of the fault table for evaluation. We will see what we can do, but I suspect we will need to get you in touch with CS on Monday.
I am sure I will hav emote questions for you after I go through the file.

Jack Brindle, W6FB
Elecraft Engineering

On Jan 18, 2014, at 3:59 PM, Gary Ferdinand <alaparos at taconic.net> wrote:

> Well, I’m hat in hand looking for some advice.  Thanks in advance.
> 
> Configuration:  K3, P3, KPA500, KAT500 to a wire.  AUX cable used for control.
> 
> Symptom:  K3/KAT500 loads fine into the wire with amp either off or in standby.  SWR goes high and no power out when amp is online.
> 
> Possibly interesting facts:
> 
> 1.   Was toying with the NAQP today.  Seemed ok at the time.  Total failure as I was trying to make a 6 meter VHF contest Q.
> 2.   Numerous faults in the fault table for excessive dissipation.  Fault code is 11, yet no fault seen on the amp.  News to me.
> 3.   I’m totally clueless as to how to interpret the fault table timestamp as to date and time, other than most recent at top
> 4.   Amp is dead on all bands, 160-6  (no power out, presents high swr to k3, relay heard in KAT500 at keying speed)
> 5.   Tried a full power-off (plug pulled) with no difference
> 6.   K3 gets the On/Off signal from the amp.
> 7.   The amp was built by me from the kit and has provided good service for months
> 8.   Firmware 1.33 on the amp.
> 
> 
> There’s a very nice snowdrift out back that I’m considering throwing it into.
> 
> 
> Tnx for any suggestions.  Now back to the schematic.  :-(
> 
> 73/Gary W2CS
> 
> 
> 
> 
> 
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