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Herald1360 · 20th Jan 2019, 6:45 pm

The 531B is fixed biassed. Four KT 66s like that ought to be good for an easy 60W, 100W if you go for it. Cathode biassed I guess nearer 60W but not being thrashed at that. It should give a good account of itself with a half decent output TX.

20th Jan 2019, 6:45 pm	#10
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: Grampian type 531 Amplifier The 531B is fixed biassed. Four KT 66s like that ought to be good for an easy 60W, 100W if you go for it. Cathode biassed I guess nearer 60W but not being thrashed at that. It should give a good account of itself with a half decent output TX. __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O