[Lowfer] One step forward and two steps backward!

[Jay Rusgrove]

Doug

It might just be the UART. I've lost a couple of these over the years on
identical systems that I use. I now keep the type in my systems in stock! Good
luck.

Jay

W0AH@aol.com wrote:

> LOWFERS:
> Now both computers are broke, mine and my wifes!  So no possibility of
> transmitting QRSS here.  Sorry.  I did check the "Device Manager" on both the
> Fujitsu Lifebooks, and both were set up exactly the same, but I received no
> "signal" voltage from mine which I have used for several years with an
> interface I made several years ago for  NA contest software, to key rig. I
> also made up a similar interface for PTT using DTR or RTS. I know I lost the
> signal voltage in late summer when the push-to-talk (DTR or RTS) line stopped
> working on interface between WSJT  (used for weak signal meteor scatter) and
> my VHF transceiver.  I think some electrical tape fell off the connection at
> the switching transistor, and the 16 volts from the computer got shorted out.
>  Yesterday, my wife's similar computer worked OK, supplying the signal
> voltage, and, using the interface, I was getting close on key (transmit)
> which I thought would key my little two transistor MEDfer rig.  I'm using a
> 13 volt power supply with that rig  The 13 VDC B+ is connected to the B+ buss
> and and am making and breaking the return to power supply B- to key rig.  My
> MFJ Grandmaster Memory keyer seems happy with this connection, but when I
> used my wife's  computer this morning, it didn't key, and I lost the 16V
> signal voltage from the computer.  This is a little more than I bargained
> for.  Learning some elementary solid state electronics and a little more
> about tank circuits has been fun though frustrating at times.  Now I have to
> learn how to fix the @##@&$ computer, and interface it so this doesn't happen
> again.  Of course, I have no idea of where to begin.
> Doug     W0AH   in Mudville
>
> --- StripMime Report -- processed MIME parts ---
> multipart/alternative
>   text/plain (text body -- kept)
>   text/html
> The reason this message is shown is because the post was in HTML
> or had an attachment. Attachments are not allowed.
> Please post in Plain-Text only.---
> _______________________________________________
> >From the Lowfer mailing list
> Send messages to: Lowfer@mailman.qth.net
> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer