you do have the KEYER box checked, right?
K4OJ
Robert L. Kellogg wrote:
> Guys,
>
> I need some serious help here.
>
> I'm trying to get NA to key my rig. It's beginning to look like
> there is a problem with the Computer/Interface. That is, the standard
> parallel port interface won't work.
>
> NA is doing everything it should, I think. I checked the voltage on
> pins 17 and 18 of the db-25 parallel port and it changes from about .06V
> to 2.5V or more when the computer sends code. The voltage varies with
> the code sent. (in other words, I can see the dots and dashes.)
>
> Scope shows the same voltage change, however, I also saw some RF along
> with the DC voltage. A .001 capacitor between pins 17 and 18 seemed to
> eliminate the RF, but The rig is still not keyed.
>
> I've checked the cable. Actually, I made a little db-25 with the
> interface circuit on it in the open so I could check voltages, etc.
>
> I need some electronics help here. Anybody know what the parallel port
> is supposed to do, and how to convert it's action to a switch that will
> key the rig?
>
> I connected my hand key to the rig and verified that it keyed OK. Then,
> I connected the above circuit in parallel with the hand key. This
> circuit operated as above, but would not key the rig.
>
> Can someone help with this problem? I suspect that my computer is
> working in a different manner than earlier models, and it may require
> some changes in interface design. Of course, I could be nuts, and need
> to put my tongue on the other side of my mouth when I key... Whatever
> the solution, it escapes me.
>
> Help!
>
>
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