RE: K3 FSK RTTY - IT WORKS!

[N3JT]

Thanks to those who responded to my inquiry about getting the K3 to work on
FSK using MMTTY and a serial-USB converter.  I discovered one pilot error
and can offer one suggestion.

1. I did not see the little window called EXTFSK pop up because it was under
all the other windows.  Normally, a newly invoked window shows up atop the
others in XP.  This one did not.  I discovered it when I was shutting down
the computer one-window at a time.  Now I see it's plainly accessible by
left-clicking on MMTTY on the task bar.  MMTTY is one choice and the EXTFSK
is the other.  Once accessed, I selected COM8 (as I had in the MMTTY setup)
and then tried the various combinations of checked boxes until I found one
that worked [TXD for "FSK output" and RTS for "PTT output"].  So the
"problem" is resolved.

2.  The serial-USB converter I bought yesterday at a local retailer works
fine for this purpose.  The MMTTY-specified Belkin converter is therefore
not the only one that works, which is good because it has not been sold for
a couple of years.  Perhaps newer serial-USB converters have evolved or been
changed, I have no idea.  The one I bought is an IOGEAR GU2C232A and I
suspect there are others that work as well. This one was $30.

Jim, N3JT  

-----Original Message-----
From: Jim Talens [mailto:[hidden email]]
Sent: Friday, August 29, 2008 17:46
To: '[hidden email]'
Subject: K3 FSK RTTY

I am having a problem getting my K3 working on RTTY in the FSK mode using a
serial-to-USB converter.  Using MMTTY and not the Belkin (now unavailable)
converter, it just won't function, even with extfsk.dll installed.  However,
it does work fine using COM1 and a direct serial connection to the K3.  

When using COM8 and the serial-USB converter it does not work.

Most of the MMTTY information is somewhat outdated, perhaps, given the bulk
of information about it dates to 2005-2005.  

What are others using to get going on FSK using a serial-USB converter?

Thanks!

Jim, N3JT

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[Richard Ferch]

N3JT said:

> 2.  The serial-USB converter I bought yesterday at a local retailer works
> fine for this purpose.  The MMTTY-specified Belkin converter is therefore
> not the only one that works, which is good because it has not been sold
for
> a couple of years.  Perhaps newer serial-USB converters have evolved or
been
> changed, I have no idea.  The one I bought is an IOGEAR GU2C232A and I
> suspect there are others that work as well. This one was $30.

Jim,

The Belkin converter mentioned in the MMTTY Help file appears to be the only
one that will work without the EXTFSK add-on, and according to anecdotal
reports this Belkin converter does not work at all under Windows XP or
newer. However, almost any USB-to-serial adapter should work with EXTFSK; at
least, any USB-to-serial adapter that will work for serial port CW and/or
PTT will also work for FSK using EXTFSK.

One setting you will probably need to adjust in MMTTY is in the Setup MMTTY
window under the Misc tab. If you are using FSK and have either the second
or third radio button under Tx Port selected, you will see a button labelled
"USB Port". You should click on this button and select option C. Limiting
speed. If you leave the default selection A. Normal selected, it is likely
that you will find that the PTT line switches back to RX before all of the
characters have been sent, truncating your message buffers.

73,
Rich VE3KI

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