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Radio Wrangler · 13th Oct 2019, 1:12 pm

I'd never even been aware of the EAA91 until this thread. EB91s have been breeding in my junk box for almost 60 years, however.

THe EAA91 number seems a bit silly when there's long history of suffix letters in valve designations to cover different bulb shapes.

Does the EAA91 do the bright heater flash on turn on in series string heater systems that I associate with the EB91?

David

13th Oct 2019, 1:12 pm	#11
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,902	Re: Why Both EAA91 and EB91? I'd never even been aware of the EAA91 until this thread. EB91s have been breeding in my junk box for almost 60 years, however. THe EAA91 number seems a bit silly when there's long history of suffix letters in valve designations to cover different bulb shapes. Does the EAA91 do the bright heater flash on turn on in series string heater systems that I associate with the EB91? David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done