Radio Shack should have a 1K resistor and a 2N2222 or 2N3904 transistor for
a whole lot less than a Rascal.
And, for the 1000MP, MARK-V, and the IC-756PRO and PROII, you can send the
TxD pin of the com port to the FSK SHIFT pin of the ACC connector via a 1K
resistor (only - no transistor) just fine. I've done this with the above
rigs for 3 years, based on documentation by K6STI in the manual for the
RITTY program. FWIW - the Field could be different I suppose. 73 - John,
WA9ALS
----- Original Message -----
From: <wa4pgm@kinex.net>
To: <rtty@contesting.com>
Sent: Tuesday, July 13, 2004 3:30 PM
Subject: Re: [RTTY] Yaesu FT-920 setup - HELP!!
> I've been using the Buxcomm with my FT1000 Field for about a year now
> without trouble. Maybe the 920 is a bit more stubborn, Ed (VP9GE) and I
> did short the pins together from the rig and the tones do change so I
> guess it's my interface after all. Wish I would have spent more time in
> preparation for my trip but I didn't realize the Yaesus were so stubborn.
> I've learned a lot from this trip and I appreciate everyone's williness to
> help. You guys and gals are GREAT! I'm not sure if I can come up with
> enough parts to build a interface or not. I saw a Radio Shack in Hamilton
> the other day so maybe there's still a chance.
> THANKS!
> Kyle
>
>
> >
> > ----- Original Message -----
> > From: "Kok Chen" <chen@mac.com>
> > To: "John Fleming" <john@wa9als.com>
> > Cc: <rtty@contesting.com>
> > Sent: Tuesday, July 13, 2004 2:54 PM
> > Subject: Re: [RTTY] Yaesu FT-920 setup - HELP!!
> >
> >
> >>
> >> On Jul 13, 2004, at 12:36 PM, John Fleming wrote:
> >>
> >> > Kyle, if you're using a BUXCOMM interface that utilizes a 4N25 or
> >> > similar
> >> > optoisolator, I'm not a bit surprised it won't key as expected. Do
> >> > youself
> >> > a favor - Make a plug for your rig's FSK ACC connector with a wire
> >> > coming
> >> > out for ground and FSK SHIFT. With the rig in RTTY mode, put it in
> >> > transmit
> >> > manually and then short the wires together intermittently and see if
> >> > you get
> >> > the expected tone shifts. If so, and I believe you will, then it
> >> > proves the
> >> > 4N25 interface will not key the Yaesu. It may appear to short using
a
> >> > VOM,
> >> > but it's actually not low enough to key the stubborn Yaesus. If it
> >> > doesn't
> >> > key manually, then there's some other problem with the rig itself.
> >> > Let us
> >> > know what happens. This has been documented somewhat by more than
one
> >> > of us
> >> > previously. Maybe W7AY would care to comment?
> >>
> >> Hah, you'd read my mind, John. I had just 10 minutes ago sent Kyle a
> >> private email suggesting that he monitor the rig while grounding and
> >> ungrounding the SHIFT key in the 4-pin DIN connector (I assume the
> >> connector is the same one used on my FT-990 and FT-1000MP) to first
> >> make sure his rig is set up correctly. (Yeah, I did mention a dummy
> >> load, HI.)
> >>
> >> I then mentioned to Kyle that a Darlington transistor would not be able
> >> to drive a Yaesu. I have no idea what a Buxcomm is, though. Does it
> >> use a optoisolator with a Darlington output? A normal optoisolator
> >> should work if you hit the LED with a large enough current, but
> >> probably not from the wimpy RS-232c signals.
> >>
> >> 73
> >> Chen, W7AY
> >
> > I don't know exactly what he has, but I'm sure it's based on a 4N25
opto.
> > See
> > http://www.k4abt.com/psk31parts.htm
> > for examples. - John
> >
> > _______________________________________________
> > RTTY mailing list
> > RTTY@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rtty
> >
>
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