What IS full QSK?
Maybe when you hear between dots and your sending at no more than
30 wpm. Or is it when you hear between words when your sending at 50
wpm, Or is it when you know someone is breaking you when your
sending at 70 wpm? Or is it all of the above?
Tom - W4BQF
----- Original Message -----
From: <al_lorona@agilent.com>
To: <tentec@contesting.com>
Sent: Thursday, November 11, 2004 12:38 PM
Subject: RE: [TenTec] QSK with QSK-5PC
Is it full QSK?
Al W6LX
-----Original Message-----
From: tentec-bounces@contesting.com
[mailto:tentec-bounces@contesting.com]On Behalf Of Steve N4LQ
Sent: Tuesday, November 09, 2004 4:39 PM
To: tentec@contesting.com
Subject: Re: [TenTec] QSK with QSK-5PC
Phil et al.
Just to clear up any confusion. I got home from work and checked
the
schematic on this mod. The T voltage is being uses, derived
from connector
61 on the control board. This is driving Q16 which has been
changed to a
2N5554. The emitter remains grounded and the collector runs
directly to J7,
the relay output. This is what keys my amp.
Steve N4LQ
----- Original Message -----
From: <al_lorona@agilent.com>
To: <tentec@contesting.com>
Sent: Tuesday, November 09, 2004 1:01 PM
Subject: RE: [TenTec] QSK with QSK-5PC
Hi, Steve,
I believe I know why the previous owner did that to your Omni
VI. (And I'm
assuming you care!)
Last night I made some measurements of the TX Enable signal
on the back
panel of the Omni VI. This line goes low at the beginning of
a dit or a dah,
then the RF comes on, just as it should. There is no problem
at the leading
edge.
The problem is at the trailing edge. The TX Enable goes high
again, but the
RF doesn't shut off immediately, so there is a period of time
when the QSK
circuit in the amp is being told to go back to receive, yet
there is still
RF flowing. This is the problem.
What is needed is for this signal to stay low just a little
bit longer,
until the RF ends completely, then it can go high again to
turn the diodes
in the QSK unit back to receive. There is a signal that will
do that in the
Omni; it's called the relay, and that explains why your
previous owner used
this signal. This is the line that is affected by the front panel
DLY.
I think I am going to do the same as your previous owner.
That is, I'm going
to bring out a line from the relay switching transistor, Q16
on the control
board, bypass the relay, and use that as my QSK line. I don't
know if it
will work yet, but that is my next plan.
True QSK or full QSK, whatever you want to call it, is really hard
to
achieve with an amplifer. The way you guys speak about QSK on the
reflector, you aren't happy unless you can hear the band
between dits at 50
wpm, but that just isn't possible between an Omni and a cheap
amp like an
Ameritron, even with the QSK switch. About the only advantage
the QSK switch
affords you is the elimination of the mechanical relay in the amp.
Anyway, that's the way I see it. Thanks again for the
information you gave
me.
Regards,
Al W6LX
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of Steve N4LQ
> Sent: Monday, November 08, 2004 5:54 PM
> To: tentec@contesting.com
> Subject: Re: [TenTec] QSK with QSK-5PC
>
>
> Al. Whatever you do, call MFJ before you hook that thing up.
> I didn't and
> blew diodes out of a rig. My QSK was external which made it
even more
> complicated.
> I can tell you this....The previous owner of my 6+ bypassed
> the amp relay in
> the rig and used the txd voltage to drive a little transistor
> which feeds
> directly to the amp relay jack. This seems to provide
> excellent keying for
> my Icom PW-1 with no sign of hot switching.
> Steve N4LQ
> ----- Original Message -----
> From: <al_lorona@agilent.com>
> To: <tentec@contesting.com>
> Sent: Monday, November 08, 2004 8:01 PM
> Subject: [TenTec] QSK with QSK-5PC
>
>
>
> Would someone who has successfully connected an Omni VI to an
> Ameritron
> amplifier equipped with the internal QSK-5PC board be willing
> to contact me
> off the list? I want to know how you connected the two.
>
> I have read Jim KH7M's previous posts on this subject and
> they are excellent
> for the external unit QSK-5, but the connections to the QSK-5PC
> are
> different enough that I cannot translate the connections in my
> head.
>
> Interestingly, a search of the Internet yields no information
> whatsoever on
> this. I am thinking of using the TX enable input on the back
> of the Omni to
> receive a handshaking signal from the QSK-5PC, but I want to
> talk to
> somebody who has done this.
>
> Thanks.
>
> Al W6LX
>
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