On 02/05/2023 18:58, Marcus Müller wrote:
Hey Glen,
this is really cool stuff!
Tried to give this a bit of reach on Mastodon [1], but I'm far from
the audience I used to have on twitter.
It's pretty cool that a galvanized pail does the job so well, would
have thought zinc wouldn't be low-loss enough a surface coating, but
was proven wrong by awesome results :) The best case of being wrong!
You wouldn't want to make extended wave-guides out of zinc-plated
steel. But for small numbers of lambda, the loss is
quite small. I routinely make dish feeds for 21cm from 15cm (6")
HVAC duct. The spiral wound stuff is quite stiff and
maintains its shape well...
