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Re: [TenTec] TT Orion: Also SEMI-BK-IN possible ?

To: tentec@contesting.com
Subject: Re: [TenTec] TT Orion: Also SEMI-BK-IN possible ?
From: Bob Henderson <bob@cytanet.com.cy>
Reply-to: tentec@contesting.com
Date: Sun, 28 Dec 2003 01:44:11 +0000
List-post: <mailto:tentec@contesting.com>
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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