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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Wrap the tube with copper foil ... posted by rickmcinnis@dogwoodfabrics.com on January 7, 2015 at 18:18:42:
I do't like wrapping the entire glass body with copper as it restricts air circulation. OK for small signal tubes , but definitely not for power tubes.
I wrap the tubes with copper tape from the bottom up to the edge of the first mica sheet. Wrapped when cold and tightly, you can then solder an overlapping edge to keep the copper from unwrapping.
While not quite the same effect, the copper simulates those rare and expensive metal base tubes: i.e. metal base 5AR4's, metal base El-34's, and sylvania metal base 6SN7's. The true metal base tubes have the base attached to a pin ( check with older tube manuals).
I wrap even ordinary 12xx7's with 1/4 inch copper tape in the same way. You more detail, better highs, but only if you want more.
Some may not like the effect but then the copper is easily removed. On an RL-34, the copper wrap on the base makes it sound more like a 6550, but agin that may not be everyone's liking
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Follow Ups
- RE: Wrap the tube with copper foil ... - unclestu 19:03:35 01/07/15 (0)
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