[Elecraft] K3 Phones / Diversity Question

[Mike K2MK]

Hi Jim,

I have my SUB antenna input connected to the AUX jack so my explanation may
have to be varied a bit to coincide with your setup. When using the SUB RX
(not diversity) it is possible to change the antenna to either the MAIN or
AUX antenna by holding the RX ANT button. The word MAIN or AUX appears
momentarily in the lower display. If I choose MAIN, however, and then long
hold the SUB button to turn on diversity, the K3 "automatically" changes the
SUB RX antenna selection to AUX. This is reasonable since diversity requires
separate antennas but if you don't have an antenna connected to the AUX jack
or if you have wired the jack incorrectly internally you will suddenly lose
volume in your right ear.

73,
Mike K2MK



Jim Bennett wrote
> 
> Hi Scott, yes - there is a separate antenna. I have an 88 foot long
> doublet connected to ANT 1 and a ground mounted Hustler 5BTV connected to
> Ant 2. In CONFIG, I have KRX3 ANT = ATU. So, if I understand correctly,
> Main uses Ant 1 and Sub uses Ant2. But, I just did an experiment and
> unhooked Ant 2 while listening to the Sub w/o Diversity turned on. Signals
> did not drop off. So, it sounds like they are sharing Ant 1. Time to putt
> off the top cover and see what I've done. Stay tuned…..
> 
> Jim
> 
> On   Friday, Aug 3, 2012, at  Friday, 10:24 AM, Scott Manthe wrote:
> 
>> Do you have a separate receiver antenna connected to the KRX3? If so, is 
>> the KRX3 configured properly to use it?
>> 
>> 73,
>> Scott, N9AA
>> 
>> 
>> On 8/3/12 1:16 PM, Jim Bennett wrote:
>>> Still have issues with this. Here are the settings in Config that I'm
>>> assuming are relevant:
>>> 
>>> L-Mix-R = A  b
>>> SPKRS = 1
>>> SPKR + Ph = no
>>> SQ Main = Sub Pot
>>> SQ Sub = Sub Pot
>>> Sub AF = Nor
>>> 
>>> With these Config settings, the K3 works fine with the SubRX turned off;
>>> equal Main audio in both headphones. When I turn on the SubRX, it is
>>> still OK; I get Main audio in the left ear and Sub audio in the right
>>> ear. I know I'm getting the Sub audio in the right ear, as I can turn
>>> the sub VFO and hear the frequency change in my right ear. BUT, as soon
>>> as I turn on Diversity, I get almost no signal in the right ear. It
>>> isn't silent - it's just that the signal that is pounding in on the Main
>>> is nearly inaudible on the Sub. If the signal being received on the Main
>>> is less than S7, I can't even hear it on the Sub with Diversity turned
>>> on. If it is an S9 or greater signal, then I can just barely hear it on
>>> the Sub when Diversity is turned on.
>>> 
>>> Very strange. The SubRX works fine until Diversity mode is enabled.
>>> 
>>> Any ideas? Does this need to be escalated to Elecraft Tech Support?
> 




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