[Elecraft] Re: Transverter TRN3 and TRN6 setup problems

[W4sc]

Geert Jan, I tried your suggestion. No luck. After setting up trn3 for 432 
MHz, IF=28, Offset = 0 trnaddr 3, ., I depressed Band +-, inband appears, 
then ----4.  I enter 32100.  The display then reads 4321000.  I do it for 
both VFOs.  A / B them they are both at 4321000.  As soon as the VFO knob is 
moved BOTH vfos become corrupted on the display. A=405900.0 ; B= 405810.0. 
Input from VFO knob locked out, display frozen.  Display never goes blank to 
indicate an unlock condition. Can switch to other bands... Firmwares are 
latest, latest, latest... BAD MCU??  Ser # 25xx with all updates.

Ben

----- Original Message ----- 
From: "Geert Jan de Groot" <GeertJan.deGroot at xs4all.nl>
To: <elecraft at mailman.qth.net>
Sent: Monday, May 09, 2005 5:08 AM
Subject: [Elecraft] Re: Transverter TRN3 and TRN6 setup problems


> On Mon, 9 May 2005 04:01:50 -0400 (EDT)  elecraft-request at mailman.qth.net 
> wrote:
>>>After setting up the TRN3 and/or TRN6 parameters in the K2 and returning 
>>>to
>>>normal operation, as soon as VFO knob turned the frequency on the display
>>>go to
>>>what seems to a randome one, AND VFO input is ignored (?) as dispaly is
>>>"locked".  Other TRN bands (TRN1, 2, 4, 5) work OK.
>> I have not seen this problem quite as described, and am running the 
>> latest
>> firmware in the QRP configuration with internal tuner.   One thing that
>> might be happening is the initial displayed frequency might be 
>> uninitialized
>> so is randomly set out of band.  Try to use the direct frequency input
>> method to set the expected frequency.  (Band- and + together, enter 
>> digits).
>
> Having done some experiments over the weekend myself, I definitely
> found that the K2 gets confused if you change the RF frequency,
> or the IF frequency.
>
> Repeat-by: set TRN1 for 144 MHz, IF 28 MHz. Manual-enter 144.000 MHz,
> Change the IF to 14 MHz. Note that the display is now off, and
> the PLL is out of band (and probably out of lock, alas).
>
> Workaround: Manual-enter the start frequency after setting up
> a transverter band. Do this on both VFO's!
>
> I don't know what code space we have in the main MCU these days
> (this has been a stumbling block from 1.x to 2.x firmware, and AFAIK
> code size issues are preventing some other things from being implemented),
> but IMHO it would be good if the K2 would auto-reset both VFO's
> if either the RF frequency, or the IF settings change.
>
> Geert Jan
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> 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