K2 VFO tuning problem on TRN 6 only

[bill4570]

Hi folks,

An odd problem popped up with the K2/XV station here.  I had occasion to change all the assignments of all the TRN channel assignments in both the transverters and of course in the K2 menu.  Everything works FB except the TRN 6 channel.

On that channel only, the K2 VFO refuses to tune.  When I spin the VFO knob, the front panel indication shows "405900" and refuses to move.  If I turn up the audio volume, I can hear noise when I move the VFO knob (except in the Lock mode).  The noise is not there when any other band is chosen.  All other TRN channels and HF bands tune normally.

If I enter a frequency directly from the keypad, (say 432100.0 for instance) the front panel indicates that the K2 accepted that frequency, but when I try to tune around, the indication returns to "405900".  The K2 will keep the keypad entered freq after band changes and on-off cycles.

This problem exists when the serial interface cable is disconnected from the K2.

When I select RIT, the K2 front panel displayed freq changes within the RIT range as expected.

The TRN6 menu settings are:  FR = 432, IF = 28, OFS = 0.00, Out = L 1.00, and Adr = trn6

When I had my 432 transverter assigned to TRN 4, the tuning through the K2 VFO worked FB.

FYI, I'm using the KRC2 band decoder for TRN 1 and TRN 2 decoding.(not for TRN 6), and all the decoded functions work well, including VFO tuning..

Anyone have any ideas why my VFO locks up on the TRN 6 channel only??

Bill,  W7QQ
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[wayne burdick]

On Mar 19, 2006, at 6:55 AM, [hidden email] wrote:

> Hi folks,
>
> An odd problem popped up with the K2/XV station here.  I had occasion
> to change all the assignments of all the TRN channel assignments in
> both the transverters and of course in the K2 menu.  Everything works
> FB except the TRN 6 channel.
>
> On that channel only, the K2 VFO refuses to tune.....

Hi Bill,

I posted this several months ago, but it bears repeating.

Some K2 owners reported a VFO tuning problem on transverter band 6.
I've duplicated the problem, and after tracing the program, I found
that the EEPROM wasn't properly initialized on this band. Among other
things, the "channel scan" feature was getting turned on.

It turns out that there's a simple work-around for this, which need
only be done one time:

1. Set up TRN6 as desired using the secondary menu. (Refer to page 17
of the K60XV manual, or to any recent edition of the K2 owner's
manual.)

2. Exit the menu, then switch to TRN6 using BAND+/-.

3. Use Direct Frequency Entry (see K2 manual) to set the VFO to the
lower edge of the transverter band on VFO A. Repeat for VFO B. DO NOT
move the VFO yet.

4. Change the operating mode, even if it appears to already be
correctly displayed; the mode data may be invalid.

5. Enter the menu again and find the RATES entry. EDIT the parameter.
Then tap DISPLAY until NOR is displayed. (You'll also see the other
channel scanning options go by.)

6. Exit the menu. Switch to another band, then back to transverter band
6 (this updates the associated area of EEPROM).

You should now be able to tune the VFO normally on this band. If you
have a similar tuning problem on any other band, it's probably due to
channel scan being turned on; turn it off using the RATES menu entry as
above.

We'll fix this in a future version of firmware, but instead of holding
your breath, please try the above   ;)

73,
Wayne
N6KR


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[Matt Osborn]

Probably not the problem, but just in case, have you changed the
addresses (dip switch) on all the XVs?

BTW, I'm still waiting for my XV432; you must be a tester.

On Sun, 19 Mar 2006 14:55:06 +0000, [hidden email] wrote:

>Hi folks,
>
>An odd problem popped up with the K2/XV station here.  I had occasion to change all the assignments of all the TRN channel assignments in both the transverters and of course in the K2 menu.  Everything works FB except the TRN 6 channel.
>
>On that channel only, the K2 VFO refuses to tune.  When I spin the VFO knob, the front panel indication shows "405900" and refuses to move.  If I turn up the audio volume, I can hear noise when I move the VFO knob (except in the Lock mode).  The noise is not there when any other band is chosen.  All other TRN channels and HF bands tune normally.
>
>If I enter a frequency directly from the keypad, (say 432100.0 for instance) the front panel indicates that the K2 accepted that frequency, but when I try to tune around, the indication returns to "405900".  The K2 will keep the keypad entered freq after band changes and on-off cycles.
>
>This problem exists when the serial interface cable is disconnected from the K2.
>
>When I select RIT, the K2 front panel displayed freq changes within the RIT range as expected.
>
>The TRN6 menu settings are:  FR = 432, IF = 28, OFS = 0.00, Out = L 1.00, and Adr = trn6
>
>When I had my 432 transverter assigned to TRN 4, the tuning through the K2 VFO worked FB.
>
>FYI, I'm using the KRC2 band decoder for TRN 1 and TRN 2 decoding.(not for TRN 6), and all the decoded functions work well, including VFO tuning..
>
>Anyone have any ideas why my VFO locks up on the TRN 6 channel only??
>
>Bill,  W7QQ
>_______________________________________________
>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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