The same computer program can then change the semi-BK-in delay when the last
character has been sent because on the Orion, everything is also adjustable
in software.
Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Bob Henderson" <bob@cytanet.com.cy>
To: <tentec@contesting.com>
Sent: Sunday, December 28, 2003 1:44 AM
Subject: Re: [TenTec] TT Orion: Also SEMI-BK-IN possible ?
> Carl
>
> The computer knows exactly when the last character element of an
> exchange has been sent and can reliquish PTT at exactly that moment. No
> delay. Using semi BK-in the delay you set has to be long enough to be
> sure you have sent that last character element before you revert to RX.
> Working at high speed this extra delay causes problems.
>
> Bob, 5B4AGN, P3F
>
> Carl Moreschi wrote:
>
> >The Orion "Amp Key" line will go to ground about 20 milliseconds before
the
> >Orion actually transmits a signal. It will then stay ground for up to a
one
> >second delay after transmit finishes. This delay is adjustable from 0 to
1
> >second. It seems to me that this line provides all the timing that is
> >necessary to key external equipment and protect it from a transmit
signal.
> >Am I missing something?
> >
> >There is also a variable QSK delay you can independently adjust for how
> >long it takes the receiver to come back on after transmit is finished.
This
> >delay is also adjustable from 0 to 1 second.
> >
> >Carl Moreschi N4PY
> >Franklinton, NC
> >----- Original Message -----
> >From: <K3BU@aol.com>
> >To: <tentec@contesting.com>
> >Sent: Saturday, December 27, 2003 11:40 PM
> >Subject: Re: [TenTec] TT Orion: Also SEMI-BK-IN possible ?
> >
> >
> >
> >
> >>In a message dated 12/27/03 6:18:13 PM Eastern Standard Time,
> >>dh0ghu@dh0ghu.de writes:
> >>
> >>
> >>>>Of course I agree with Jack that on HF, QSK is an abolute must for
> >>>>
> >>>>
> >>reliable operation. It has nothing to do with PTT: Be sure, I'll not use
> >>a PTT for CW contesting, I only have two hands, one for the PC, one for
> >>the keyer, that's all...)<<
> >>
> >>If I understand, you seem to consider PTT to be Phoot To Talk. PTT line
> >>
> >>
> >is
> >
> >
> >>used by computer to switch system from receive to transmit and vice
versa.
> >>
> >>
> >With
> >
> >
> >>bunch of equipment like amplifiers and switching systems for radios and
> >>antennas, precise control of PTT signal timing allows to fine tune the
> >>
> >>
> >system,
> >
> >
> >>eliminate hot switching, millions of unnecessary cyclings and
unnecessary
> >>
> >>
> >delays
> >
> >
> >>as experienced with semi-BK. We do not use PTT for foot switch type
> >>
> >>
> >control by
> >
> >
> >>real feet.
> >>
> >>Yuri, K3BU
> >>_______________________________________________
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> >>TenTec@contesting.com
> >>http://lists.contesting.com/mailman/listinfo/tentec
> >>
> >>
> >
> >_______________________________________________
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> >
> >
> >
>
>
>
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