[amsat-bb] Re: RIT for FT-726R?

Scott Townley nx7u at cox.net
Mon Oct 1 19:40:21 PDT 2007

I don't think that's true in the FT-726R.
The RX and TX VFOs in satellite mode are not linked/tracking VFOs.  As the 
other fellow drifts down, you can adjust your RX down to compensate.  Your 
TX stays the same (from the ground).
Since the VFOs are not linked, there is no difference between tuning the RX 
VFO down and tuning RIT down...the only advantage to be had is if for some 
reason you need to know your "starting point" RX freq.
The only way to truly keep from walking is computer control.  No dice with 
the FT-726R.

Now someone is likely to correct me on that last statement...but even 
radios with tracking VFOs, track at a Hz-per-Hz rate, don't they?  My 
IC-821 does...so if you manually tune, even with the VFOs in track, one 
link is a little off because they need to track at 3:1 (at least for VU and 
UV modes).

At 18:54 2007-10-01, Bob Stewart wrote:
>--- Scott Townley <nx7u at cox.net> wrote:
> > I don't understand why you'd need RIT...just tune the RX VFO?  Is there a
> > reason you need to keep track of the original RX freq?
>Without an RIT, you just wind up walking down frequency on each
>transmission, perhaps onto someone else.  With an RIT, you're reset
>back to your original downlink frequency each time you transmit.
>With any luck, the other guy is doing something of the same sort,
>such as computer control, and you wind up sitting in the same
>spot for the entire QSO.  To me, this seems like a good thing, since
>I do not have a computer controlled system.
>Another thing is that this should cut down the flipping of the satellite
>knob back and forth from transmit to receive for each transmission.
>I'm looking at the Mouser catalog for solid-state relays.  Maybe I can
>get something going.
>Bob - AE6RV
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Scott Townley NX7U
Gilbert, AZ  DM43di
mailto:nx7u at arrl.net

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