Nicron #35 22 мая 1997

Story - Letter from afar.

                        A letter from afar

(C) WLODEK BLACK
(C) FARAON

Below we publish a letter received by Victor (FARAON) directly 
from Lviv long distance through the CDOS-modem (no joke). Not

possible that this connection can claim the record for
communication range by CDOS, but this is not important. And 
most importantly, to our opinion, the fact that Spectrum 
networks continue to evolve, and the guys are willing to 
cooperate with a Lvov ZXNet. At the next Council network, this 
information will be communicated to the Regional Coordinator 
ZXNet, but for now, with the permission of the authors of the 
letter and recipient, we publish a letter. We think everything 
is clear! 


            Hello, Victor!

  This is a message to you from Sergei from Lvov (remember, you 
for me passed two modems?). If you read this letter, then we

managed s'connect'itsya that pleases.

  I must say that experimenting with modems, we are with Andrew
(You know it, too) have found the optimal circuit design.
Instead of transmitting transistor KT940 I put an
transistor (KT503E + KT940) scheme Darlington. This revision
aurally extended frequency range to higher frequencies, and
little to improve communications at high speeds. In addition,
resistor, which takes the line (560 ohms), I increased to 750 
ohms so I got sent to the signal line greater

amplitude.

  I do not know how much these improvements can be significant 
for Moscow telephone lines, but they are essentially Lviv

improve the functioning of the modem as a whole.

  Prepared for you a couple of music files Andrei written
in ASM1.12. Swill, he wrote to Sinclair myzyku very well, and
given the fact that he sees nothing, then we can quite say
that he had done.

  Victor, I would like to ask you about something. Andrew said 
that Do you have version CDOS3.11 or could something else more

new. We can, for example, something changed, unless, of course,
want.

  I also want to inform you that in Lviv modems so far, as I
know, nobody has. I want to try a little
to fill this "gap". There are people who can help
produce and distribute the modems in Lviv. Schematic
decision, I can not say that was rude ripoffs from your
modem, as there are many improvements taking into account
our lines and available configuration. In addition,
schematic diagram of a modem, I would myself could think of, 
because I circuitry, but I did not have available the 
description of Governors signals that postuayut on him, 
"Kolupaev" in the program I'm afraid not like.


  I think what the Lviv will develop computer
network, Moscow ZX-NET not only did not lose, but still
win. A competition for the modem we will not draw up,
because the distance between us and a half thousand kilometers, 
and the road is very expensive.


  In connection with these to me, Victor, you need a test 
version of the modem and also would not hurt and the statute 
ZX-NET. I would be very grateful and I'll try not to stay in 
debt. 


 Sincerely, Sergey. 22.05.97


 P.S. For the answer to your call Andrew
because it is sometimes possible to call
free.