[TenTec] dit chopper IC-7800

Tue Aug 10 18:22:40 EDT 2004

This is interesting.  As I said the Omni VI+ doesn't work well in QSK with
the 87A or the Acom whether loop connected or not and that's due to the way
TX Out on the VI+ is timed.  If the Orion really works properly in loop mode
with the Acom 1000 and the Alpha 89 then that suggests that the Orion timing
for TX Out is different to the VI+.

Could this be the reason Ten Tec amplifier owners using Orions are
complaining about the QSK not working well?  It sorta seems to me if the
Orion is correctly timed for QSK loop connect with the Acom and the Alpha
then it can't be for the Ten Tec amps which use the sequenced relays.

As I say....that's the way it seems to me.

Bob, 5B4AGN

----- Original Message ----- 
From: "Duane A Calvin" <ac5aa at juno.com>
To: <n4py at earthlink.net>; <tentec at contesting.com>
Sent: Tuesday, August 10, 2004 9:36 PM
Subject: Re: [TenTec] dit chopper IC-7800

> And this is how I have my Alpha 99 connected.  Also works great on 1.371.
>
>         73,  Duane
>
>
> On Tue, 10 Aug 2004 21:28:12 -0000 "Carl Moreschi" <n4py at earthlink.net>
> writes:
> > I run the Acom 1000 with my Orion.  I use the TXOut line of the Orion
> > to the
> > Acom key in line.  I then connect the Acom key out to my Orion TXEN.
> >  This
> > results in perfectly timed full QSK with the Orion and Acom 1000.
> > This
> > works well with Orion firmware 1.371.
> >
> > Carl Moreschi N4PY
> > Franklinton, North Carolina
> > n4py at earthlink.net
> > ----- Original Message -----
> > From: "Bob Henderson" <bob at cytanet.com.cy>
> > To: <tentec at contesting.com>
> > Sent: Tuesday, August 10, 2004 8:37 PM
> > Subject: Re: [TenTec] dit chopper IC-7800
> >
> >
> > > Duane
> > >
> > > I have been running full QSK for almost 30 years.  I have never
> > used a
> > > keying loop with my amps and I don't have hot switching problems.
> > > Currently, I have two Orions, one drives an Alpha 87A and the
> > other an
> > Acom
> > > 1000.  The 87A is pin diode switched but the Acom uses a vacuum
> > relay.
> > Both
> > > amps are controlled with direct connections from the Amp Key 1
> > outputs of
> > > the Orions.
> > >
> > > With apologies for mentioning the unmentionable..........I have
> > previously
> > > used these amps successfully in QSK with TS930, TS870, TS950,
> > TS570,
> > > FT100MP, FT1000MP Mk V Field, & Elecraft K2.  The only radio I
> > have which
> > > will not work well without modification is my Omni VI+.  The VI+
> > doesn't
> > QSK
> > > properly with these amps whether I use a loop circuit or not.  The
> > only
> > way
> > > I have been able to get either of these amps to work properly in
> > QSK with
> > > the VI+ is by retiming the TX Out signal from the VI+.  TX Out
> > from the
> > Omni
> > > VI+ is enabled in a timely fashion on key down so there is no
> > leading edge
> > > problem but it is disabled about 15-20mS too soon and so causes
> > tail end
> > > clipping big style.  The loop circuit on the VI+ appears timed
> > specifically
> > > for Ten Tec amps.
> > >
> > > Bob, 5B4AGN
> > >
> > >
> > > ----- Original Message -----
> > > From: "Duane A Calvin" <ac5aa at juno.com>
> > > To: <tentec at contesting.com>
> > > Sent: Tuesday, August 10, 2004 7:44 PM
> > > Subject: Re: [TenTec] dit chopper IC-7800
> > >
> > >
> > > > Hi Tommy,
> > > >         I don't understand your comment - how can it run full
> > QSK
> > without
> > > > a keying loop for the amp?  Either something is hot switching,
> > has the
> > > > potential to, or it's not really running full QSK.  Maybe I
> > don't
> > > > understand the comment.  (Or, maybe the rig is QSK but the amp
> > isn't -
> > it
> > > > stays in transmit?)  My Orion runs full QSK fine with my Alpha
> > 99, but I
> > > > don't know at what speed it breaks down.  Certainly does well at
> > 40 WPM,
> > > > which is about as fast as I go.
> > > >
> > > >         73,  Duane
> > > >
> > > > On Tue, 10 Aug 2004 13:45:09 -0400 "Tommy"
> > <aldermant at alltel.net>
> > writes:
> > > > > That's OK Rick, I understand.
> > > > >
> > > > > Unfortunately, I think Ten Tec has taken your exact track on
> > the
> > > > > amplifier/QSK issue. The Orion, with the latest versions of
> > > > > firmware, v1.371
> > > > > and v1.370, will not work with the Ten Tec Titan 3. Maybe
> > someday?
> > > > > But as
> > > > > you say, high speed CW ops are an extremely small minority of
> > active
> > > > > hams
> > > > > and marketing types don't think there are enough sales (and
> > > > > rightfully so)
> > > > > to worry about that issue or operating the rig in the CW mode
> > much
> > > > > over
> > > > > about 50 wpm. However, since you do not need a keying loop to
> > run
> > > > > full QSK
> > > > > with Icom gear, that IC-7800 running at 80 wpm last night sure
> > did
> > > > > sound
> > > > > excellent.
> > > > >
> > > > > Tom - W4BQF
> > > > >>
> > > >
> > > >
> > > > Duane Calvin, AC5AA
> > > > Austin, Texas
> > > > _______________________________________________
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> > > >
> > >
> > >
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> >
> >
>
>
> Duane Calvin, AC5AA
> Austin, Texas
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