[RTTY] Yaesu FT-920 setup - HELP!!

[John Fleming]

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?

I was on vacation out of town last week and might have lost track of this
thread - sorry if my post is redundant somehow.  73 - John, WA9ALS

----- Original Message ----- 
From: <wa4pgm at kinex.net>
To: <rtty at contesting.com>
Sent: Tuesday, July 13, 2004 2:11 PM
Subject: Re: [RTTY] Yaesu FT-920 setup - HELP!!


> So far no luck getting the 920 working in FSK mode. I've checked my
> Buxcomm interface with a ohm meter and it's showing a short when keyed,
> when I unkey the short goes away. This leaves me to believe my interface
> is good. Ed VP9GE has listened to my signal and it's only a carrier with
> no shift.
>
> Switch on back of rig is set for FSK.
>
> Rig Menu is setup:
> Mode - DATA/LSB
> U42 - Hi2125L
> U43 - Sft 170
> U44 - RES
>
> I don't find any other menu setting that might help, perhaps I've
> overlooked it.
>
> I tried different Volume/Recording Control settings so perhaps I've
> screwed something up there? At this point I don't know which way is up
> anymore. :)))
>
> Using MMTTY 1.65
>
> Doesn't look good at this point in hopes of operating NAQP, but I'll keep
> trying.
>
> THANKS EVERYONE!
> 73,
> Kyle
>
>
> > Kyle,
> >
> > 1.  First, be sure that you are, in fact, supplying the FS keying
> > information
> > to the 920 before suspecting the rig.  If you have an ohm meter, put it
> > across the leads that you are connecting to the FSK jack on the 920.
> > Depending on
> > what your sending, the meter should either show a short on keying or
show
> > SOME fluctuation.  If you are not getting any indication that the FSK
> > contacts
> > are being shorted for the duration of the mark tone, then you will have
to
> > correct that problem -- which would be from the output of your computer
or
> > your
> > Terminal Unit.
> >
> > 2.  If you are getting an indication with a meter that the contacts are
> > being
> > supplied with a short when needed, then you need to be sure that you
are,
> > in
> > fact, able to FSK the 920.  Make a contact on phone.  Tell the other
> > operator
> > that you will be sending a carrier and that when you touch a couple of
> > wires
> > together, the carrier frequency should shift slightly.  For this test,
it
> > would
> > be best to set the 920's FSK to USB.  However, the other guy should be
> > able
> > to tune around and hear your carrier and detect a shift in it when you
> > touch
> > the wires together.   Then, go back to SSB and listen to what he tells
> > you.
> >
> > If you are unable to shift the frequency in this way, that would
indicate
> > that you still do not have the 920 set up correctly, or, it isn't
working
> > right.
> >
> > 3.  If you don't have  a small VOM with you, get one at Radio Shack and
> > put
> > it in your travel kit.  If you had one with you, you would be able to
> > easily
> > solve this problem.
> >
> > I'll be interested to see what you find.
> >
> > Good Luck!
> >
> > Mike
> > W0YR/4
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