27-10-2012, 02:32 PM
(27-10-2012, 01:02 PM)pwdrive Wrote: The "?" valve in your last pic should have been an EF39 or it's equivalent I think.
Lawrence.
No, it's not an EF39: no screening and the anode is the wrong shape. Might be a 6K8G though. It has always puzzled me how a 6K8G did not have metallising, considering its role as a frequency-changer. And I have seen them fitted into sets without an external metal screening can, too. Once upon a time, I did substitute one for an ECH 35 in a Philips set when I was a young 'un and learning by experiment. Boy, did that oscillate!
Al.
