KPA500

[Dr. William J. Schmidt, II]

I just turned on my KPA500 to do some DX work before I have to return home
from J6 tomorrow.  We had a hack of a storm two days ago and the antenna was
connected but no lightening was observed.  My KPA500 receives fine in
Standby but receive signals seem attenuated by several dB when in Operate.
The amp makes power in transmit as usual.  Without the manuals here I
suspect there are some PIN diodes in it that got hammered in the storm.
Anyone else see this?



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[Don Wilhelm]

No lightning observed is not a reliable indicator of the amount of
static charge that can accumulate on the antenna.

Disconnecting the antenna when not in use or switching the radio input
to a dummy load or ground is the only sure prevention.

73,
Don W3FPR

On 9/16/2018 8:07 PM, Dr. William J. Schmidt wrote:
> I just turned on my KPA500 to do some DX work before I have to return home
> from J6 tomorrow.  We had a hack of a storm two days ago and the antenna was
> connected but no lightening was observed.  My KPA500 receives fine in
> Standby but receive signals seem attenuated by several dB when in Operate.
> The amp makes power in transmit as usual.  Without the manuals here I
> suspect there are some PIN diodes in it that got hammered in the storm.
> Anyone else see this?
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[Michael Walker]

I have seen that when it wasn't on the Band it was supposed to be on.  I
also saw the same thing when the PTT line didn't get pulled fully to ground.

You have likely confirmed this though.

Mike va3mw

On Sun, Sep 16, 2018 at 7:28 PM, Don Wilhelm <[hidden email]> wrote:

> No lightning observed is not a reliable indicator of the amount of static
> charge that can accumulate on the antenna.
>
> Disconnecting the antenna when not in use or switching the radio input to
> a dummy load or ground is the only sure prevention.
>
> 73,
> Don W3FPR
>
> On 9/16/2018 8:07 PM, Dr. William J. Schmidt wrote:
>
>> I just turned on my KPA500 to do some DX work before I have to return home
>> from J6 tomorrow.  We had a hack of a storm two days ago and the antenna
>> was
>> connected but no lightening was observed.  My KPA500 receives fine in
>> Standby but receive signals seem attenuated by several dB when in Operate.
>> The amp makes power in transmit as usual.  Without the manuals here I
>> suspect there are some PIN diodes in it that got hammered in the storm.
>> Anyone else see this?
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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