[GreenKeys] another bit of old-n-new

[gil smith]

Hi George:

Ahh, havin' some fun today "copying ITTY."

Here's a 'nuther old-and-new collection of gear:
http://www.baudot.net/tty-232/Georges-feed-2-25-05-001.jpg
http://www.baudot.net/tty-232/Georges-feed-2-25-05-002.jpg
http://www.baudot.net/tty-232/Georges-feed-2-25-05-003.jpg
http://www.baudot.net/tty-232/Georges-feed-2-25-05-004.jpg

The HP laptop on the right feeds ethernet to winamp, to headphone-out.  One 
channel of the stereo headphone-out goes to a splitter to feed the 
dovetron's audio-in, and also the laptop's mic-in.  For the headphone-out 
jack, I used a stereo-phone-to-phono adapter, (to prevent shorting one 
channel to ground with a mono sleeve, or shorting LR channels together with 
a stereo-to-mono adapter.  On the dovetron I used BNC-to-phono 
adapters.  Might not be a bad idea to balance and isolate the dovetron's 
audio input with a little 600-to-600-ohm transformer, but have not done that.

The laptop's mic-in is driving MMTTY, for monitoring the received text.

Then, the Dovetron's EIA-Output jack connects to the 6P6C modular TU232 
port on TTY-Connect.  The command   /.TW,4,2,3,60    configures TTY-Connect 
to connect the TU232 port to the LV-Loop at 60-wpm.

The LV-Loop-Out from TTY-Connect keys the loop-to-232 converter TTY232-TAP 
(the DB9-to-DB9 adapter thing with the scope probe hangin' off).

TTY232-TAP's 232 port connects to a mid-80s-vintage Toshiba T1100Plus, one 
of the first laptops.

The Toshiba is running Dave Ross's TTYSIM program, emulating a 60-wpm tty, 
to monitor the text stream.  It's a DOS program, and is for COM1 only, but 
it even runs under windows, and is a bulletproof little emulator.

I had to power-cycle the dovetron a couple of times, when it got hosed 
somehow, but other than that the copy was great.

gil havin-too-much-fun smith




Vaux Electronics, Inc.
480-354-5556
(fax: 480-354-5558)
www.vauxelectronics.com