KRX3 Audio Seems Down a Bit from the Main Rx

[dhhdeh]

Hi Everyone,

My K3 (#371) has the KRX3 installed and is sharing the same antenna with
the primary receiver.  Since it was installed I have noticed that the
sub-Rx audio volume is down compared to the main receiver requiring my
to run the AF for the sub-RX about 20% higher than the main receiver audio.

Since installing Beta 2.67 and using the new audio balance feature with
the sub receiver audio control, I notice that I cannot get a balance
between the two receivers without running the sub-RX audio control at
the 2-3 o'clock position.

Is the common? Perhaps due to the 3 db splitter for the sub-Rx?  Am I
missing something? Any thoughts?

Not a biggie, but I am curious.

BTW the new balance feature is pretty neat.  Thanks Wayne, Lyle et.al.

73 de N1LQ-Dave


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[P.B. Christensen]

> Since installing Beta 2.67 and using the new audio balance feature with
> the sub receiver audio control, I notice that I cannot get a balance
> between the two receivers without running the sub-RX audio control at the
> 2-3 o'clock position.

Same here, but it was more like the 1-2 o'clock position.  The problem?  The
outer knob skirt was not positioned on the shaft correctly during my
construction.  This may have nothing at all relevant to your problem, but to
rule out a similar occurrence, rotate the Sub volume skirt (balance) and
ensure that the white index line on the knob rotates the same distance from
center when turning the control full CW, then again full CCW.

Paul, W9AC

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[Jim-168]

Dave, I noticed a very small difference, but it's so very small and actually
never noticed it until you mentioned it.

73 de KE4WY Jim

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of David and Dianne on
Comcast
Sent: Saturday, November 22, 2008 5:51 PM
To: [hidden email]
Subject: [Elecraft] KRX3 Audio Seems Down a Bit from the Main Rx

Hi Everyone,

My K3 (#371) has the KRX3 installed and is sharing the same antenna with
the primary receiver.  Since it was installed I have noticed that the
sub-Rx audio volume is down compared to the main receiver requiring my
to run the AF for the sub-RX about 20% higher than the main receiver audio.

Since installing Beta 2.67 and using the new audio balance feature with
the sub receiver audio control, I notice that I cannot get a balance
between the two receivers without running the sub-RX audio control at
the 2-3 o'clock position.

Is the common? Perhaps due to the 3 db splitter for the sub-Rx?  Am I
missing something? Any thoughts?

Not a biggie, but I am curious.

BTW the new balance feature is pretty neat.  Thanks Wayne, Lyle et.al.

73 de N1LQ-Dave


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[W8YMO]

Hello Dave,

Yes I am having a similar problem with my K3 Sub Rec trying to share the
same antenna with the main receiver.  I was just getting ready to e-mail
Elecraft Tech Support with a request for help.  I will now post this request
for information here first.

My K3 (0166) WAS factory built and the sub receiver factory installed.  I
have not yet gone inside.

My Sub receiver Audio worked very well at first but the Audio started to
drop to less than 05% of the main receiver audio on some operating sessions.
Because the Sub Audio worked fine at times (even with Beta 2.67) I assumed
that I had a CONFIG Menu problem where the Sub Receiver was not getting an
RF signal from the Main Antenna. I also thought that HamRadioDeluxe might
have changed the CONFIG Menu when it shut down.

Bottom line for me is that now my Sub Receiver audio is about 05% as strong
as the Main Receiver audio (it was perfect a few days ago).

73, Harrison W8YMO

---------------------------------------------
----Original Message-----

> From: [hidden email] [mailto:elecraft-
> [hidden email]] On Behalf Of David and Dianne on Comcast
> Sent: Saturday, November 22, 2008 5:51 PM
> To: [hidden email]
> Subject: [Elecraft] KRX3 Audio Seems Down a Bit from the Main Rx
>
> Hi Everyone,
>
> My K3 (#371) has the KRX3 installed and is sharing the same antenna
> with
> the primary receiver.  Since it was installed I have noticed that the
> sub-Rx audio volume is down compared to the main receiver requiring my
> to run the AF for the sub-RX about 20% higher than the main receiver
> audio.
>
> Since installing Beta 2.67 and using the new audio balance feature with
> the sub receiver audio control, I notice that I cannot get a balance
> between the two receivers without running the sub-RX audio control at
> the 2-3 o'clock position.
>
> Is the common? Perhaps due to the 3 db splitter for the sub-Rx?  Am I
> missing something? Any thoughts?
>
> Not a biggie, but I am curious.
>
> BTW the new balance feature is pretty neat.  Thanks Wayne, Lyle et.al.
>
> 73 de N1LQ-Dave
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

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[wayne burdick]

In K3 firmware revision 2.67 we introduced a new feature that may have
some bearing on this issue: independent sub receiver antenna selection
for diversity vs. non-diversity. It may have defaulted to AUX in either
case. If you didn't have an antenna connected to the sub's AUX input,
you would have no input signal for the sub receiver.

If you want the sub receiver to use share the MAIN antenna path, just
go into BSET and tap ANT until you see MAIN. You can set this up
differently for diversity and non-diversity use of the sub receiver.
The K3 will store both settings.

A related feature also added in rev 2.67: if the sub receiver is turned
on, holding RX ANT will alternate between AUX and MAIN for the sub's
antenna. This is faster than using BSET.

73,
Wayne
N6KR


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