Quote:
Originally Posted by Yamamaya42
the only I worked with was on my FADA (rca 630ts clone) and had a 12 inch screen 12LP4, which needed a bit stronger magnetic field vs the 10 inch 110ma vs 100.
otherwise , the circuit was almost the same as below, except for having a PM ion trap, and having that circuit omitted.
http://www.qrp.gr/technology/vttv/rca630ts.pdf
i still have the PM focus magnet of of a necked 21ep4b, but at almost 120ma equivalent,it's no doubt way too strong to use on the CRT you have,
you never DID say what that was... |
Thought I did say? Sorry.. its a 17FP4. it does not have the focusing anode. the CRT that was in the set originally was a 17HP4. I picked up the CRT NOS from a guy who has tubes listed on the ETF Spreadsheet. he drove down locally and I met up with him to pick it up and do the exchange.
I picked up a cheap 100mA focusing coil from ebay that I need to build a mount bracket and a circuit around. But i dont know if that is enough current or not. I may make a pitstop back down to the tv shop warehouse and have another look around to see if i can find a junker set i can steal a coil from if not.