tony sayer wrote:
In article , Bob Eager
writes
On Tue, 7 Sep 2004 23:37:01 UTC, tony sayer wrote:

Nostalgia...

And the AF115 for the VHF or was it 114 ???

And the AF139 in yer TV amp

Them were the days...

So who remembers EF91s...EL91s...and I forget the others...


EF.* that was some sort of 6.3 volt heated triode wasn't it?.

Recall the EY51 the wire in EHT rectifier 'tho and the EB91 that double
diode thingy?...

No - correct about the E, 6.3 volt indirectly heated cathode, but the
F means pentode. It's C for triodes (e.g. ECC81, ECC82 and ECC83 the
ubiquitous double triodes)

--
Chris Green