From: Nick Kennedy (firstname.lastname@example.org)
You'll sometimes see arguments over whether to even use the stuff. I guess
it stabilizes the windings mechanically, against vibration and so on. I
think all coatings lower the Q of a toroid a bit, but Q-dope does it
minimally, hence the name.
There was a good newsgroup posting by Roy Lewallen on the subject of using
other types of goop, including RTV and hot glue, I think. He measured the
effects of the various coatings on Q. I think this posting was once stored
on the now lamented VE3BPO QRP homebrew page.
Here's a link to it:
If that doesn't work, it came from a Google groups search on Lewallen, Q
dope, RTV. Easy to find.
BTW--when I tried dissolving packing peanuts in acetone, I came up with a
disgusting, slimy glop. I've since been told that not all such materials
are polystyrene. Maybe I'll melt my beer cooler or minnow bucket next.
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