Focus Coil circuits?

[Yamamaya42]

Originally Posted by mbates14

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.

Something does not add up here...

according to frank.pocnet.net datasheets, BOTH the 17FP4 and the 17HP4 have electrostatic focus and the same bias of 12L

https://frank.pocnet.net/sheets/127/1/17HP4.pdf
https://frank.pocnet.net/sheets/127/1/17FP4.pdf
and thus are pretty much the same.
Meaning focus is p6 and magnetic focus wont work.
Is the " 17FP4" above an error? cause it does show it as ES focus.