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In Reply to: RE: Yes, you can use gapped OPTs with parafeed. posted by hifipaul on November 22, 2016 at 18:54:56
It seems that when they varnish the unit it glues all the lams together. Also i spent a lot of money initially and don't want to ruin them. Maybe i will play with some cheap el84 unit first. thank you for suggesting.
Follow Ups:
Pulling lams out of a finished transformer which has been waxed or varnished is, as you've suggested, a very, very difficult undertaking.
Almost always you will not get back in the same number of lams as you've yanked out when stacking alternately (say 1x1).
If you bend or tweak the lam in getting it "unglued" and pulled out... it should go in the trash can. Lams (especially high perm materials) are very strain sensitive and their magnetic properties subject to degradation if bent or tweaked.
If you have a nice SE airgapped output... keep it... don't monkey with it.
For many projects you can get nice parafeeds for not a bankroll of money.
MSL
Builder of MagneQuest & Peerless transformers since 1989
Just as i suspected. In the past i have tried to "straighten out" a power trans which had crooked lams because it must have been dropped. I could not get to straighten out the lams. And i really tried hard. I won't describe the process but decidedly caveman style. Even after that i am using the trans and it works great but there is a little buzz when the current use is high.
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