[Elecraft] KPA500 troubles

[w4grj]

I need to correct the information on the repair cost

It was $615 with shipping not $650 as I previously reported.

 

Jack W4GRJ

 

 


On Thursday, November 12, 2015, W4GRJ <w4grj at satterfield.org> wrote:

Since I have never operated on 60m ever... You figure it out
Jack
W4GRJ

On Nov 11, 2015, at 3:33 PM, Jim Brown-10 [via Elecraft] <ml-node+s365791n7610243h47 at n2.nabble.com <javascript:;> > wrote:

On Wed,11/11/2015 12:10 PM, W4GRJ wrote:
> Got the KPA500 back from Elecraft.
> Problem found: L22 and other components in the 60M low pass filter circuit
> burnt through the LPF PCB.

60M LPF??? Last I looked, the US power limit on 60M is 100W relative to
a half wave dipole.



> Repair $650 later: Replaced low pass filter module and installed QSK mod.
>
> On the phone I asked what caused the failure, answer was no idea other than
> component failure. I understand stuff fails but I thought I would get more than 2 years before a major expensive failure.

The LPF is on the output of the amplifier. One possible cause of failure
could be lightning.

> Previously had a Ameritron ALS-600 for 5+ years never a problem, sold it to
> purchase the KPA500.
>
> Sometimes the grass is not greener.

My only experience with an ALS-600 was at a contest station in PJ4
several years ago. I found it to be a really inferior amp - most of the
time, I was lucky to get 300W out if it. No comparison to a KPA500.

73, Jim K9YC


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