[amsat-bb] Yaesu FT-857D and Doppler

[Rolf Krogstad]

The FT897D performs the same way, no CAT frequency adjustment while
transmitting.


Rolf    NR0T

On Thu, Nov 1, 2018, 10:52 AM <w0km at cox.net wrote:

> I'm curious, does the ft-817 behave the same way??
>
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> On Thu, Nov 1, 2018 at 10:15 AM -0400, "Mark L. Hammond" <
> marklhammond at gmail.com> wrote:
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> Hasan, is this a possible solution?
>
> https://www.arrl.org/shop/files/pdfs/Satellite%2520Kit.pdf
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>
> Mark N8MH
>
>
> On Thu, Nov 1, 2018 at 9:09 AM John  wrote:
>
> > Hasan,
> >
> > It's a "design feature". As you said, you've been told correctly. It
> > doesn't
> > accept CAT commands for changing frequency whilst in TX.
> >
> > 73,
> > John (M5ET)
> >
> > -----Original Message-----
> > From: AMSAT-BB  On Behalf Of Hasan al-Basri
> > Sent: 01 November 2018 13:54
> > To: amsat-bb at amsat.org
> > Subject: [amsat-bb] Yaesu FT-857D and Doppler
> >
> > I have been told that this radio will not accept CAT doppler adjustments
> > while it is transmitting. I definitely see that it doesn't, but don't
> know
> > if I might be doing something wrong.
> >
> > Here is how it behaves:
> >
> > If not transmitting, doppler correction works perfectly. As I assert PTT,
> > doppler adjustment stops and I slide up the band...pretty quickly on high
> > passes. If I hold the ptt for more than a couple of seconds, I will go
> > right
> > out of the passband of my 2.2 kHz filter...and of course become
> > unintelligible.
> >
> > As soon as I drop PTT, and key the mike again, I'm dead on freq...and as
> > long as I hold the PTT on, I drift up the band. *It appears the the
> FT-857D
> > will not accept CAT commands while PTT is asserted.*
> >
> > At this point I need to know that there is no real solution to this
> problem
> > with this radio. If that's true, I can get pretty good at doing this:
> >
> > 1. Assert PTT and start talking.
> >
> > 2. Grab VFO knob, adjust as I talk to keep sounding good.
> >
> > 3. Drop PTT and begin to listen to other station. (at the drop of PTT,
> tx
> > freq snaps to "proper" place that it couldn't get to when PTT was
> asserted)
> >
> > 4. My turn to talk: Assert PTT and I'm dead on freq where I belong.
> >
> > Basically, I'm doing manual uplink adjustment to freq while I'm talking
> and
> > letting the CAT adjustment for doppler to take place (to the uplink freq)
> > while I'm listening.
> >
> > *If there is a better way to do this, please advise*.
> >
> > Note, it is not practical to drop PTT quickly enough and often enough to
> > prevent the problem...I can only speak a couple syllables at best,
> before I
> > slide away.
> >
> > Equipment and Setup:
> >
> > Rx: SDRPlay RSP2 Sofware Defined Radio with SDR Console v 3.03 providing
> > Doppler to Rx
> >
> > Tx: Yaesu FT-857D controlled as External Radio by SDR Console v 3.03
> > providing doppler correction to the External Radio.
> >
> > p.s.  I have tried other doppler control programs and they behave the
> same
> > way.
> >
> > Any and all help would be most appreciated, even simply: You are stuck
> with
> > the way you are currently doing it.
> >
> > 73, N0AN
> >
> >
> >
> >
> >
> > Hasan
> > _______________________________________________
> > Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available to
> > all
> > interested persons worldwide without requiring membership. Opinions
> > expressed are solely those of the author, and do not reflect the official
> > views of AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
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> >
> > _______________________________________________
> > Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions
> > expressed
> > are solely those of the author, and do not reflect the official views of
> > AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >
> --
> Mark L. Hammond [N8MH]
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
>
>
>
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>