Behold, Paul Burridge signalled from keyed 4-1000A filament:

On Wed, 17 Mar 2004 12:30:56 GMT, Gregg wrote:

Hi Paul!

There are non-inductively wound ones specifically for the purpose. The
mfr. specs should show an ESR curve - the non-inductive ones are pretty
flat to their SRF.

I notice some of them come with one end tinted red (or sometimes black).
Does this indicate the non inductively-wound type?


Nope. That just indicates the "outside" foil - commonly goes to ground.

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