[Lowfer] One step forward and two steps backward!

[lowfer@mailman.qth.net]

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



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