[GreenKeys] Use of Volpe Board

[Steve Garrison]

You can send and receive to and from a TTY with just one of these boards.
At least in a current loop scenario.  I've only used mine with either 15,
19, 28, and Klienschmidt TT-98 machines.  All but one of my Kleinschmidt
machines had had its own loop supply.

 

Steve G./N4TTY

 

From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
On Behalf Of Ken Wiebe
Sent: Friday, September 6, 2019 7:10 PM
To: Thomas Tillson via GreenKeys <greenkeys at mailman.qth.net>
Subject: [GreenKeys] Use of Volpe Board

 

I asked Jordan this question but he wasn't sure.  I asked it in a slightly
different way, but here goes:

 

Would it be fair to compare the Volpe board to many of the other current
loop-to-serial adapters, except that the Volpe board uses USB instead of
RS-232?

 

I have a little experience hooking up a 33 and a 35 to computers using the
more traditional RS-232 serial ports on the computer side.

 

I realize the Volpe board has added functionality (which is one reason it
interests me).  But since the TTY side of the Volpe board looks (to me) just
like the TTY side of the current loop/RS-232 adapters, my assumption is that
it can be used in the same way.

 

What is prompting this question is that the Volpe board doesn't seem to be
"marketed" as this type of device, and also the stated limitation that it
does not provide its own loop current.

 

So here's the crux of my question:  Let's say I hooked up the Volpe board
directly to a model 33 - one pair to TTY send and the other pair to TTY
receive.  Would all the pieces be there to tx/rx to a USB-connected
computer?

 

If not, I guess that means that the current loop/RS-232 circuits I've been
using thus far somehow inject current into the TTY side (?)

 

What would I need to add to make the Volpe board work in this scenario?

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