[hpsdr] Mercury Preamp off anomally

[Graham / KE9H]

ENDO:
Very likely the relay.
There have been several of them fail.
73's
--- Graham / KE9H

==

ENDO wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi All,
>
> I enjoy HPSDR Mercury and Penelope.
> Yesterday I powered off Mercury when PowerSDR was still running.
> Restarting Mercury with Preamp off, no signal I can hear, however Preamp on
> it works.
>
> Afterwards I re-programmed Mercury firmware and re-installed PowerSDR.
> The situation doesn't change. I watched the schematic where there is a relay
> K1 which insert the ATT.
>
> Preamp On means no ATT, Off means insert the ATT.
>
> I found K1 relay works, but the contact may be damaged. It is hard to
> understand.
>
> Is there someone to expereince this kind of problem?
>
> Regards,
>
> Tokio
> JA1CCA
>
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