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Re: UK MMC bulk order
Reinhard,
One good feature of the resistors is that you don't have to try and discharge
all the charged caps when repairing the device. The one I made with 350 -
4.7uf caps was a [$#-at-*&!] to discharge. I should have added them also. I
ended up wrapping the whole thing in al. foil to discharge them. Good idea
Terry.
R. Scott Coppersmith
In a message dated 7/6/99 4:31:49 PM US Eastern Standard Time,
tesla-at-pupman-dot-com writes:
<< Original Poster: "Reinhard Walter Buchner" <rw.buchner-at-verbund-dot-net>
Hi Mike, all,
> Original Poster: wwl-at-netcomuk.co.uk (Mike Harrison)
> Does anyone have any definite findings either way for
>the need for equalising resistors in an MMC? I seem to
>remember seeing a comment that they were unlikely to help.
I (still) run my MMC without the equalising resistors. I have
not seen any *real* unequal DC voltage distribution among
the many caps. My MMC is doing just fine. I know Terry
will disagree with me (he loves those Eq-Rs), but I donīt
think that the MMC in a TC will see a build up of DC voltage.
On the other hand, a la Terryīs new formulas, my MMC is
rated at *very good* (T0 is a mere 1.5, which supports my
touch and feel results (no heating felt), as you canīt measure
such a small change in temperature with your hand).
However, I WILL use EQ-Rs for the final setup. Not because
of DC build up, but in order to discharge the caps after
shutdown. While I have not seen any huge residual voltage,
caps CAN (as the dielectric flexes and returns to original
shape) build up considerable voltage after a while. Plus, if
you have a large amount of caps, you need to discharge
them individually. Just shorting the bus connectors will NOT
necessarily discharge all the caps within the MMC.
Bottom line is: a 10Meg resistor across each cap isnīt a
too expensive life insurance and it wonīt steal any real
power away from your TC, so there is good reason to
use them.
Coiler thoughts and greets from germany,
Reinhard
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