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Station X · 19th Jun 2017, 10:45 pm

This set uses an auto-transformer. Check the total DC resistance of the windings. It should be around 210 ohms.

Does the lamp in the lamp limiter still glow brightly if you remove a valve?

19th Jun 2017, 10:45 pm	#139
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Bush A.C.91 This set uses an auto-transformer. Check the total DC resistance of the windings. It should be around 210 ohms. Does the lamp in the lamp limiter still glow brightly if you remove a valve? __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.