[Amps] Tufnol rod
Ian White, G3SEK
G3SEK at ifwtech.co.uk
Tue Sep 16 17:53:52 EDT 2003
>Has anyone had any experience with the machinable ceramics now
>available e.g. from Farnell in the UK? They look ideal for a lot of
>amps applications, although rather expensive.
If they're like the ones I used in the lab some years ago, they're death
to lathe tools (the dust isn't so good either) and they still need to be
fired to full hardness.
>Rich comments on the cold flow of Teflon/PTFE. It can be a problem, but
>may be manageable if there's not too much stress.
Which there shouldn't be, in an RF choke wound on something like 3/4in
>Fibreglass tube is the best bet, although it too may be a bit
Pyrex glass tubing is also good, though it's difficult to anchor the
ends of the winding. To make a base mounting, epoxy in a large brass
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
More information about the Amps