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FERNSEH · 14th Oct 2019, 9:38 pm

Maarten wrote: "Was it actually marked thusly in the set, or only in a (later) service manual?"

Never seen the EAA91 in any UK made TV set and that includes the B16T. The Pye B16T service manual valve list shows the EB91. The other double-diode employed in the set is the older octal base EB34.

DFWB.

14th Oct 2019, 9:38 pm	#30
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: Why Both EAA91 and EB91? Maarten wrote: "Was it actually marked thusly in the set, or only in a (later) service manual?" Never seen the EAA91 in any UK made TV set and that includes the B16T. The Pye B16T service manual valve list shows the EB91. The other double-diode employed in the set is the older octal base EB34. DFWB.