K. S. wrote:
>This is sort of a nuance to that-
>
> Most degaussing circuitry works by allowing current through a thermistor
>until it heats up. That's what would show the voltage across the coil dropping
>off quickly. If you try to observe the voltage across the degauss coil
>terminals without actually having the coil attached, you probably wouldn't see
>it drop off at all.
>
>
Partially true. If you only use the thermistor the current doesn't drop
low enough and the picture will "wobble" due to a small amount of
current still going through the coil. That's why there is usually a
combination of two thermistors working against each other, as they heat
ones resistance goes up while (to lower the current to the coil) and the
other goes down (is across the coil to make the current go lower than it
normally would).
In the case of Amplifone BOTH parts are in the same package.
You might need a load to see the circuit do its thing. Could be a good
use for a 100 watt light bulb.
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Received on Sun Mar 23 16:01:59 2003
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