[TenTec] omni 6+ pbt tune

[M. P. Haynes]

Hi Guys and Gals,

My thoughts on this phenomena is that it is due to the skirts of the
filters not passing the received audio below a nominal frequency of
probably 300 hZ or so.   This would be a normal occurrence in all rigs
with PBT.  I have a Paragon I and it does this also.  As an aside, I
notice on my Delta II  which has the variable Jones filter that as I 
close down the filter to narrower and narrower bandwidths I have to
slightly shift the PBT to keep the received CW station centered.  I don't
notice this effect on my Jupiter. I suspect that the engineers shifted
the center frequency of the digital filtering scheme as the bandwidth is
narrowed.  Easier to do with software than hardware.  Just my thoughts
and observations.

73,

Pat-K4BEH

On Wed, 26 May 2004 18:06:07 -0400 "Vic Klein" <vhklein at ptd.net> writes:
> I have a 585 Paragon and it is exactly the same. You CAN set the PBT 
> to 12
> o'clock and keep it there, but shifting it for USB or LSB as you 
> describe
> tends to center it audio in the available bandwidth and improve the
> frequency response. The effect is more pronounced with tighter 
> filter
> settings, such as using the 1.8 KHz on SSB. Similarly, to use the 
> 500Hz
> filter setting when running FSK the PBT needs to be at the 11 
> o'clock
> position or the signal will be out of the passband on my radio.
> 
> =Vic=
> WA4THR
> 
> > Well, I have only had three Omni VI's, the Plus and the two Option 
> 3's. In
> each and every one of them I found the sound MUCH more > agreeable 
> with the
> PBT at 11 o'clock for LSB/CW and at 1 o'clock for USB.  Of course, 
> you can
> use a 12:00 o'clock high postion for > all the modes - which is FB 
> for DXing
> and contesting, but not so good for extended ragchewing.
> 
> > 73  Pete Allen  AC5E
> 
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> 
> 

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