Behold, Philip de Cadenet signalled from keyed 4-1000A filament:

Other than importing from RF Parts in the US or Barend in the
Netherlands does anyone happen to know of a UK source for any of the
following parts:

Unelco/sprague type metal clad capacitors

25 ohm semi-rigid coaxial cable

Philips 'Blue Spot' or similar high voltage RF trimming cap's, min 300v
working (65pf).

Thanks.

There was a couple in London, but I lost the URL's :-(

There are some very inexpensive Russian mail-order houses too.

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca