FILAMENT/PWR SUPPLY TRANSFORMERS: 22 volt, 2.4 amp, plastic cased, with
jack for computer type ac cord (120V 60Hz input). About 4 inches cubed,
3.5 lbs. each, unused mint condition, $4 each (plus shipping). 36330 zip
(Alabama). These could be used with a rectifier and appropriate sized
cap to power 28 V filaments, or as is for 21 V or 24 V sweep tube
filaments. Also good for 24 V power supply. Case can easily be opened by
pulling out the four rubber feet to expose the screws. Email or call
334-347-5281 day/eve/wknd. Note: up to four of these will fit in a
priority mail flat rate box for $8 postage.
You can view a picture of it he
http://atlanta.craigslist.org/ele/164289701.html