[Elecraft] K3 deaf when bandwidth smaller than 500Hz??

[Guy Olinger K2AV]

Anything that disrupts the signal path, including a complex diode
switch network that is the literal switching device. Includes a messed up
configuration

On Tuesday, June 23, 2015, <Bernhard.Horst at bmw.de> wrote:

> Hi folks,
>
> after three weeks not using my K3 (Antenna disconnected, power off) I
> observed a very strange thing:
>
> When turning the bandwith down to 500Hz, the loudspeaker goes deaf despite
> separate 250Hz and 500Hz filters installed!
> This happens only to the main receiver, the sub receiver performs as
> wanted.
> When selecting a bandwith above 500Hz the K3 works as normal! It seems as
> the K3 is not selecting the smaller filters in the RX path.
>
> Did update firmware, resets, restored old configurations...last but not
> least the Elecraft hotiline could not help further.
> The only solution is sending it back.
>
> Did anybody observe a similar thing?
>
> S-Nr. Is 7629.. 2,8kHz; 2,1kHz; 1,8kHz and 500Hz/250Hz filters installed
> Apart from the 2m module fully equipped!
>
> Quite lost at the moment.
>
> 73s
> Bernie
> DL5RDP
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