Behold, William Warren signalled from keyed 4-1000A filament:

snip

You know, I think there's a ham in Maine who might have a use for this:
Sebago Lake, or vicinity. He puts out those interesting weekly
broadcasts ... ;-J

Bill

LOL! One of our FRN friends? ;-)

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