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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