[Elecraft] Using the Sub Receiver

[Vic Rosenthal]

Setting up the subreceiver can be quite confusing, especially if you are using it both for diversity and for pileups. The Fred Cady KE7X manual has a very good discussion of this, with several diagrams.

Vic 4X6GP/K2VCO

> On Apr 19, 2015, at 2:29 AM, Bruce Sawyer <aquariusds at sbcglobal.net> wrote:
> 
> Here's a quick update, just to save people from sending me more replies.
> Right after I posted I received email from K6KR, an old friend.  Dick asked
> the right question:  "Do you have the KRX3 enabled?  Hold the MENU/CONFIG
> button for a half second or so, then rotate VFO B to "KRX3", and VFO A to
> either "Ant=BNC" or "ANT=ATU". You don't want "not inst"."  The answer was
> that it was installed, but set to "ANT=BNC".  Of course!  That's how
> Elecraft would have tested it.  Once I set it to "ANT=ATU", it immediately
> began behaving correctly.  Problem solved!
> 
> Bruce, N6NT
> 
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bruce
> Sawyer
> Sent: Saturday, April 18, 2015 4:08 PM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] Using the Sub Receiver
> 
> Apologies in advance if I am misusing this reflector.  I just joined it a
> moment ago in an effort to get some help.
> 
> 
> 
> I recently upgraded my K3 by adding the sub receiver to it.  I built the rig
> myself, then used it for 5 months without the sub receiver, and just last
> week had the sub receiver installed and tested by Elecraft.  That gives me
> some confidence that it should be working.except that I absolutely cannot
> figure out how to use it.  Initially I tried to use it the same way I did
> the sub receiver in my old FT-1000MP, but I can tell this one doesn't work
> that way.  If I simply tap SUB, which is what I would have expected, then
> the VFO B knob has no effect on what I'm hearing through the right
> headphone.  The only way I have been able to get the sub receiver to behave
> like a sub receiver has been as follows:
> 
> a.       Set CONFIG:VFO IND to YES.  Then set VFO's A and B to different
> bands.
> 
> b.      Tap SUB to turn the sub receiver on, then press and hold SUB to put
> it into diversity mode, then tap SUB again.
> 
> If I do all of that, then I can hear a different frequency in each ear and
> the VFO A and VFO B knobs are respectively controlling the frequencies of
> what I hear in each ear.  But that is nonsense!  I have not been able to get
> the rig to do this when both are on the same band.  What I want is to have
> both VFO's on the same band so that I can listen to the calling station on A
> and tune around on the pile-up with B,  all the while being able to hear
> both frequencies.  How do you do that?
> 
> 
> 
> It is slowly becoming apparent to me that VFO A, VFO B, and SUB are three
> different things.  I guess what I'm really asking is how do I get the VFO B
> knob to control the frequency of SUB?  I have practically memorized pages
> 37-38 of the user manual and it's still not coming through for me.  Help!
> 
> 
> 
> Bruce, N6NT  
> 
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