Its a handy feature if your keying an amplifier with a slow T/R relay.
Contest logging programs like TRlog close the PTT line a few
milliseconds before the CW starts. This can give a slow amplifier
T/R relay the jump on the RF envelope from the rig. Of course, you
could probably interface this signal directly with the amplifier and
not even involve the transceiver. On Kenwood rigs, it helps
make the station idiot proof, since you can typically switch a
Kenwood into full break-in mode from the front-panel. This is
fine if you are using a QSK amp, but if your using a non-QSK
amp, a guest op could easily push this button not knowing any
better and kill the amplifier TR relay real fast. If the PTT interface
is operating, the logging software will close the PTT, thus
holding the T/R closed during Tx regardless of the QSK setting.
Its also a handy feature if you are doing two-transmitter lock-out
(only one transmitted signal at a time).
73 de Mike, W4EF....................................
----- Original Message -----
From: "Grant Youngman" <nq5t@comcast.net>
To: <tentec@contesting.com>
Sent: Thursday, December 25, 2003 9:13 PM
Subject: Re: [TenTec] PTT for CW
> > Everyone that wants PTT for CW mode, send the request to
> > ditsnbits@tentec.com
>
> I know there must be a reason for this. But I have to admit, even
> after listening to all of the discussion and moaning, I still don't
> understand it. Could be I'm just slow.
>
> The first time I tried QSK I was hooked, and never went back.
> Running CW without being able to "hear" is like driving blind.
>
> Someone once pointed out how EASY it would be to build a simple
> outboard controller to handle this CW cum PTT business. Wonder
> if anyone has taken the time to put something together, or if we just
> expect the vendor to hold our hands all of the time now.
>
> Just a rant. Frankly I hope T-T does it just to quiet down the
> grumbling ... :-)
>
> Grant/NQ5T
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
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