Heat is a very good point I completely failed to consider. While the tube
never seems to get very warm, I don't normally operate more than 600 watts or
so. It would seem silly to use a chimney material that could melt down after
lengthy QRO use, so I definitely need to reconsider.
The silicone tubing material is an interesting idea, but as silly as it may
sound I'm not thrilled at the idea of how it may look. Perhaps I could find a
way to secure it around the tube in a tidy way with an ABS clamping mechanism
that's far enough below the heatsink to avoid any heating issues...
On Wednesday, November 23, 2016 3:02 PM, Jeff AC0C
There's not an issue with RF as you suspect assuming the pigments or any
additives in the ABS are not RF conductive - but the heat is a problem.
Pure ABS is a low temp material and that tube is going to melt that about
the first time you warm it up. And ABS resin with common additives is still
going to have a melt temp (HDT) way too low.
The safe bet is to use automotive silicon turbocharger hose. You cannot
melt it and it's not RF conductive. About $20 for a 1' length of 4" at the
performance car parts jobber near you.
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