[Elecraft] Struggling with diversity mod

Udo Langenohl - DK5YA dk5ya at dk5ya.de
Tue Aug 11 19:02:52 EDT 2015


Problem solved. Internal antenna routing messed up completely after 
upgrading to the latest firmware. I've reloaded an old configuration 
saved with a very old firmware (from May 2013) after the upgrade. That 
was a bad idea.
Call me SRU... (stupid radio user) :-) ... my fault.

Thanks to all that replied.

73 Udo, DK5YA

Am 11.08.2015 um 13:11 schrieb Udo Langenohl - DK5YA:
> Sorry, forgot to mention: it's a K3 (serial 59xx) issue here.
>
> Am 11.08.2015 um 13:01 schrieb Udo Langenohl - DK5YA:
>> Gents,
>> with the last firmware release I'm struggling with diversity mode. I was
>> running diversity for a very long time without any issues on my Xpol EME
>> system (144 MHz). The main RX is fed with the H-Pol signal from my
>> transverter #1 via KXV3-A, the sub RX is fed with the Vpol signal from
>> transverter #2 at AUX input. Both transvertes are in exactly phase by a
>> common GPS controlled LO. In diversity mode the signals were stereo at
>> line out, with Hpol on left and Vpol at the right channel. It was
>> exactly the same on my headphones.
>>
>> With the latest firmware release there's no stereo signal at line out
>> anymore and I recognize that strange "hum hum hum" phase shifting on my
>> headphones. On line out there seems to be either a mono signal mixing
>> both channels to one or just the main RX on both left and right. I can
>> see this clearly on my WSJT system, when Hpol and Vpol signals are
>> eaxctly the same now. There's no difference anymore, even that there
>> must be some.
>>
>> When diversity is off and main RX and sub RX are exactly on the same QRG
>> things are like they were before: main RX on the left and sub RX on the
>> right channel on both line out and headphones.
>>
>> Anything worng with the latest firmware release, is this a new feature,
>> a bug or is it me doing something wrong?
>>
>> Have no idea.
>> 73 Udo, DK5YA
>

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