[sdiy] Potted expo converters

[Brock Russell]

At 06:24 AM 30/12/03 -0800, you wrote:
>Ladies Tangents,
>
>I remember one day I got all excited at this brainstorm I got that you could
>(sort of) duplicate the functionality of the ua726 by using the remaining
>trannies in a 3046 as a self heater, only to find it had been done a billion
>times before when I posted the idea on this list.
>
>d'OHI!
>
>So, here's another lightbulb that appeared over my head that I'd thought I'd
>bounce off you all  that I'm also willing to bet ain't original, either...
>
>I remember when I was an engineering tech two billion years ago, we used to
>glue thermocouples to the windings of 1/2 horsepower electric motors using
>thermally conductive epoxy for UL lock-rotor tests. the material seemed to
>be was astonishingly heat conductive. But...we were dealing with
>thermocouples which could detect a match being lit in the next room (not
>really of course, but you know what I mean).
>
>Along the same lines, has anyone tried potting the tempco/expo converter
>pair in conductive epoxy to A) improve heat transfer from one another and B)
>aid in isolation from ambient conditions?
>
>Just curious.
>
>I know a few manufacturers, Steiner-Parker included,  used to place all
>three parts in a little metal box filled with thermal compound.  The
>alternative I'm mentioning here seems much less messy.
>
>Considering we're dealing with comparatively low voltages, I assume there
>wouldn't be a lot of difference, but if it meant an improvement in stability
>even a little may be worth it.  I tell you what - it's a lot easier than
>scanning the globe for 726s all the damn time.
>
>anyone?

Jörgen Bergfors
http://hem.bredband.net/bersyn/VCO/vco_quad.htm
http://hem.bredband.net/bersyn/VCO/expomodul.jpg


>anyone??
>
>thanks in advance,
>
>
>Peter