Fwd: [Elecraft] Strange problem when switching modes from VFO A to B

[Gregory Fischer]

Wayne is working on this bug and it should be fixed in the next release.

Thanks!
73
Greg


Begin forwarded message:

> From: Gregory Fischer <ab7r at cablespeed.com>
> Date: December 14, 2008 8:22:06 PM PST
> To: "Dick Housden, W0NTA" <w0nta at arrl.net>
> Subject: Re: [Elecraft] Strange problem when switching modes from  
> VFO A to B
>
> Dick,  I was able to duplicate your report.  I sent a note to Wayne  
> and I am sure it will be corrected.
>
> Thanks for the info!
>
> 73
> Greg
> AB7R
>
> On Dec 14, 2008, at 8:06 PM, Dick Housden, W0NTA wrote:
>
>>
>> Jack,
>>
>> You are correct. I have had the reports of pinched audio and just  
>> cycle to
>> another band and back or switch sidebands and back and everything  
>> is OK.
>>
>> I have duplicated what you report:
>>
>> VFO A on CW and VFO B on SSB.
>>
>> Turn off K3 while on VFO A - CW.
>>
>> Turn it back on and immediately switch to VFO B - SSB and the audio  
>> is
>> terrible.
>>
>> Cycle to other sideband and back and all is well again.
>>
>> This only happens to me on 40, 80, and 160 meters. Other bands are
>> unaffected. Each time I have had a report of bad audio, it was on  
>> 40 meters.
>> Rarely operate 80 or 160 meters.
>>
>> I am glad to find out how to get around this problem. I hope  
>> something can
>> be done with programming to fix it, though.
>>
>> 73, Dick, W0NTA
>>
>>
>> Jack Colson wrote:
>>>
>>> I have VFO A programmed for CW on each band, VFO B programmed for  
>>> SSB
>>> (makes no difference which sideband ).  Power up the K3 on VFO A  
>>> then
>>> switch over to VFO B and the signal generated is extremely  
>>> distorted and
>>> sounds like it is being transmitted via a very narrow filter.  To
>>> correct this problem simply switch the mode from L or USB to CW  
>>> and back
>>> again to L or USB.  Audio is then restored to normal.  I have the
>>> filters programmed correctly, the 2.7KHz filter is used for  
>>> transmit.  I
>>> am using the ESSB mode with a 4 KHz filter.  This problem is  
>>> independent
>>> of band.
>>>
>>> I mentioned this to Gary who passed it onto Lyle and who was  
>>> unable to
>>> make it happen.  I am using firmware 2.38 DSP 1.92.  I am waiting  
>>> for an
>>> update which will fix the turn on audio spike before updating.
>>>
>>> Any suggestions ?  It is just a nuisance getting a report of who  
>>> is that
>>> calling!!!
>>>
>>> 73,
>>> Jack, W3TMZ
>>>
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>>
>> -- 
>> View this message in context: http://n2.nabble.com/Strange-problem-when-switching-modes-from-VFO-A-to-B-tp1656359p1656737.html
>> Sent from the Elecraft mailing list archive at Nabble.com.
>>
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