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In Reply to: Thanks Dave Slagle and Larry D. Moore .... posted by drlowmu on April 20, 2007 at 13:31:13:
Was the sheilding made from mu metal? T Willman
Follow Ups:
Nope. But ANY metal is better than letting the iron's field freely RADIATE into the tube while it is operationg too close to the iron Tom. Right ??!! Regards .
It was used extensively in the early days of electronic design. How ever Crutchfeilds sells mu metal foil at a resonable price. Mu metal does a great job of sheilding low frequency emf. If you look around at swap meets and in vintage surplus electronics you can also find the thicker far more effective variety. That is if you want the killer stuff! T Willman
than the low DCR crapola being continually regurgitated onto this forum. The possibility that a strong magnetic field from an OPT might influence a nearby tube seems entirely plausible. It is, however, the sort of thing that should be measurable. In the absence of discernible mutual conductance or other tangible evidence, this concept should similarly be shucked in the nearest rotary bin. Building shielding when no such anomaly has been adequately demonstrated is self-delusional.
that the out put or the power tranny can emit rf. There for I would think that low frequency emf might be a problem in the right situation and proximity. My experience with mumetal was to sheild my power transformer from my output transformer. This ultimatly was only needed to lower hum during turn on while there was no curent flowing through the output transformer. I consider it wasted money because it was not needed after warm up. T Willman
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