[TenTec] TT omni vii if port problems

[Bob McGraw K4TAX]

Largely because the dongle being used does not tune below or have 
adequate sensitivity below about 20 to 25 MHz.    The IF in the Omni VII 
is about 70 MHz.

73

Bob, K4TAX


On 8/30/2018 3:31 PM, Greg S via TenTec wrote:
> I highly recommend this mod, to allow full use of the SDR. Not sure why anyone would use the I.F. these days, honestly.
> Greg, KC8HXO
> --------------------------------------------
> On Thu, 8/30/18, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote:
>
>   Subject: Re: [TenTec] TT omni vii if port problems
>   To: tentec at contesting.com
>   Date: Thursday, August 30, 2018, 12:59 PM
>   
>   Do you have any application
>   associated with the device controlling the
>   radio?  Also, if you are tuning to a signal
>   using the dongle, it may be
>   incorrect with
>   regard to frequency thus this puts the Omni VII off
>   frequency.     You may need to perform a
>   Master Reset on the Omni VII.
>   There are
>   known some software applications which do shift the VFO,
>   although not displayed as such on the radio.
>   This will produce and off
>   frequency
>   condition.
>   
>   I had a a 3
>   Rivers Dongle on my Omni VII and it worked OK.   The
>   software was a major pain in the posterior to
>   get running correctly.
>   Finally I
>   wrote it off as a learning experience.   I then purchased
>   an
>   SDR Play  RSP-1 receiver and downloaded
>   free HDSDR software.  All issues
>   resolved
>   and it works great.
>   
>   I also
>   made the mod to the Omni VII for the 2nd receiver which I
>   find
>   works even better.  With the SDR Play
>   I can see signals on the entire
>   band, thus
>   not limited to the IF bandwidth.  That works great as
>   well.
>   
>   73
>   
>   Bob, K4TAX
>   
>   
>   On 8/30/2018 11:17 AM, denton
>   sprague wrote:
>   > Hi all…I installed an
>   if port output as per 3 rivers TT omni vii dongle
>   instructions to enable me to use a pc as a spectrum monitor.
>   it works fine on receive but the minute I transmit, am told
>   I am off frequency.
>   > I am thinking of
>   either installing a relay that will disconnect the
>   dongle’s if input during transmit…
>   >
>   Anyone else have a different work around?
>   >
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