[ct-user] LPT Keying Cable Problem

[K4OJ]

radio comes up key down as expected, huh!

sounds like you are saying that when the interface is plugged in and you
turn the rig on it is key down (xmitting)

If this is indeed the case you probably are one of the many 90's (00's)
radio users who will need to buy a stereo adapter plug for your keying
line...

Check this out with out the interface plugged into your rig, using your
ohmmeter or some other way to check for conductivity is the tip and the
shield a short, like you would get with the ole J38 straight key depressed?
AKA key down....

If so then I say it is a computer related problem....but form the way you
describe it I bet it is the "new age" rig syndrome I have witnessed on
Kenwood,  Icom and Yaesu rigs...

The problem is related to how they have inboard keyers and want to use that
jack in the back (buster rhyme???) as both the port for your keying line or
the jack for your paddle...usually a switch on the front panel of the rig
allows you to turn the keyer on or off...

I have found as a host to many multi-ops this to be a problem...can remember
more than one weekend when plugging the usual 1/4" phono plug to RCA jack
adapter resulted in the rig going key down, before the interface was
attached...

If this is goin on go to radio shack and get one of those 1/4" stereo plug
that has the whole in the back of the plug for a 1/4" mono plug to go
in...this is the fix for that...

Otherwise, assuming your software is configured to tell the right comm port
the fact that you want that one as the keyer info I would say you are in a
whole  'nother world!

Check with a local who does the code...it is a quickie to check  with a VOM!

GL

k4oj



----- Original Message -----
From: "Frank Grossman" <71042.1303@compuserve.com>
To: <CT-USER@contesting.com>; <Grossmanzz@aol.com>
Sent: Saturday, July 22, 2000 6:19 PM
Subject: [ct-user] LPT Keying Cable Problem


>
> The continuing saga...
>
> All attempts to key my IC-765 with the W1WEF keying interface have failed.
> W1WEF, Jack, has replaced my interface, and I believe I've followed all
> suggestions contributed by users on this list.
>
> So, here's the problem again in the hope that a light bulb will go off in
> someone's head this time and point to the correct solution.
>
> I've tried the keying interface with two different computers, two
different
> interfaces, and two different programs--CT and DX4WIN (demo).  Both
computers
> and both programs work fine through our com ports on either computer with
> either program.
>
> The only thing I can think of that I haven't tried yet is using a
different
> radio, but we see no reason why this should be an issue since the com port
> interface always works.
>
> The specific symptoms are fairly straightforward.  With the interface
> connected, the radio comes up key down as expected.  When using a com port
> interface, the key-down condition is broken and the radio begins to key
> normally.   When using the LPT interface, the key down condition is not
> broken and the radio does not begin keying.
>
> I've done all tests with the VOX turned off so I'm only keying the
sidetone,
> so RF isn't the culprit.
>
> I'm currently using CT 9.50, but don't think this is an issue since I've
also
> attempted to key the radio using DX4WIN.  I don't know of any TSR's I'm
> supposed to load to use the LPT port.
>
> Some people on the list have suggested that the interface has a bad
> transistor, or incorrect pinouts, but this doesn't seem likely since Jack
> replaced the interface.
>
> If someone is going to be in Brooklyn during their summer travels and
wants
> to visit my shack and try to figure out what's going on, please let me
know.
> The shack is located at the callbook address.
>
> Hope someone has an idea!
>
> Frank
> wb2bxo@arrl.net
>
> --
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>
>


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