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qubie.fix
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1985-06-03
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3KB
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50 lines
For all owners of the somewhat infamous and oft-maligned Qubie' Modem:
A "QUICK AND DIRTY" FACTORY FIX !!!
===================================
I have been a beleagured and frustrated owner of the Qubie'internal modem
since January 1984. Virtually from the first day that I put my first QB
modem (Iam now working with a replacement) on this BBS I have experienced
the abominable level of bit error rates during file transfers that have
been most adequately described in this message system by other users. It
must be noted, however, that I have encountered such difficulties on only
three bulletin boards out of the 5060 that I have worked across the
country:
1. Plantz PC BBS ... (8824227 and 8824228)
2. Bridgeport RCPM ... 3264392
3. Lain's Bolingbrook PC BBS ... 9720628
In all other cases, both my original QB modem and its replacement performed
flawlessly at 1200 baud with bit error rates approximating almost precisely
those stated for the Hayes 1200 series units. This fact, of course,
implied to me that there was nothing really wrong with the QB modem. That
my problem, and those experienced by others, were entirely traceable to
conditions on the host side of the communications line. Consequently, I
have for months tolerated degraded transfer rates and a few disconcerting
system "hangups" while online with the above cited bulletin board systems.
A few days I happened to call the Qubie' people about another matter,
mentioning my continuing hassle with three of my favorite boards.
Immediately, the QB rep recommended a fix for my problem:
A. Remove the Qubie' modem board and locate potentiometer R 32
just beneath the speaker. This pot adjusts the incoming carrier
signal level.
B. With small jeweler's screwdriver, adjust this pot ... first in
in halfturns and subsequently, in quarterturns ... clockwise to
increase or counterclockwise to reduce the carrier.
C. Replace the modem board and dial up the problem BBS and check for
"glitches" or number of receive errors during XMODEM transfer of
a file of about 100 blocks or so in size. Repeat adjustment
procedure until error rate is reduced to an acceptable level.
I hope this remedy works as well for you as it has for me. If you have
questions, please feel free to call me at 7444105 during the workday or
9785088 evenings after 9:00 PM.
Reggie Jones