My bet is on a fried PIN diode (I think the T/R system gets bypassed
when you switch to standby mode). Best to contact support....
73,
~iain / N6ML
On Sun, Feb 10, 2013 at 12:01 PM, <jpescat...@aol.com> wrote:
>
> Disconnected PTT line from KPA500, still 15 db attenuation on RX.
>
>
> -----Original Message-----
> From: Dick Dievendorff <die...@comcast.net>
> To: mcduffie <mcduf...@garymcduffie.com>; 'John K3TN' <jpescat...@aol.com>
> Cc: 'elecraft' <elecraft@mailman.qth.net>
> Sent: Sun, Feb 10, 2013 5:58 am
> Subject: RE: [Elecraft] KPA500 - Rx Attenuation
>
>
> Make sure that the amp's PTT line is not pulled low when you expect to be
> receiving.
>
> 73 de Dick, K6KR
>
>
>
> -----Original Message-----
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of AG0N-3055
> Sent: Saturday, February 09, 2013 8:24 PM
> To: John K3TN
> Cc: elecraft
> Subject: Re: [Elecraft] KPA500 - Rx Attenuation
>
> On Sat, 9 Feb 2013 19:51:09 -0800 (PST), John K3TN wrote:
>
>> I thought 40M signals sounded kinda low, and the noise floor on the P3
>> was down - but then noticed when I turned the KP!500 from OPER to
>> STBY, signals came about 15db. No fault indicated. TX power seems fine.
> Any thoughts?
>
> I'm currently investigating a similar problem. To speak to your issue, I
> have not seen it at all. However, there is something similar happening on
> the frequencies below 160M.
>
> Gary
> --
> Web: http://ag0n.net
> NodeOp Page: http://ag0n.net/irlp
> Node 3055: http://ag0n.net/irlp/3055
>
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