How to quiet near ultrasonic noise from H-19a terminal ?

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1 total messages Started by Mark Becker Thu, 18 Apr 1991 02:33

#591

Author: Mark Becker
Date: Thu, 18 Apr 1991 02:33

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Hello -

Nearly nine years ago I built an H-19a terminal.  And I'm still using
it with an old CP/M system.  One of the most reliable pieces of com-
puting machinery I own.

However... the whine from the flyback transformer is starting to drive
me up the wall.  It is extremely LOUD.  Loud to the point where my
teeth hurt whenever I switch the thing on.  As it's right at the edge
of my range of hearing, it also makes my ear ache.

Others must have run into this problem before.  What have YOU done to
quiet the transformer?

Your help appreciated.

Regards,
Mark
+-----------------------------------------------+-----------------------+
| Mark Becker					| .signature under	|
| Internet: mbeck@ai.mit.edu			|	construction	|
+-----------------------------------------------+-----------------------+

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