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From: rbowman <bowman@montana.com>
Newsgroups: comp.os.linux.misc
Subject: Re: The joy of FORTRAN
Date: 14 Mar 2025 18:25:08 GMT
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On Fri, 14 Mar 2025 01:51:49 -0400, c186282 wrote:

>    GAWD I hated the sound of those TV/monitor flyback transformers back
>    in the day - like having teeth drilled.
>    Wiki sez they were 30-150khz, TVs 15khz ... but no WAY hearing 150khz
>    ... maybe sub-harmonics.

During the '70s energy crisis Sylvania came up with the idea of using a 
current limiting capacitor in a slightly short 48" fluorescent. The cap 
and a small transformer were housed in a plastic shell. The two halves 
were assembled with an ultrasonic welder. Ultrasonic my aching ass.

Later my dentist had a ultrasonic device for removing calculus from teeth. 
Besides the whine there was enough cooling water to drown you. Their use 
was discontinued several years back. When I asked her about it she said 
everybody, patients and techs, hated the things. Back to the traditional 
scraping with assorted torture instruments. 

The ranch supply used to have a jar full of assorted dental instruments 
for $1 apiece so I have a collection. They certainly are handy for 
removing fork seals or getting the crud out of firearm nook and crannies.