Rsd 6l6gc

[luis]

I'd been offered a pair of old RSD 6L6(West Germany written on the boxes) to replace modern JJTesla I have in my 5e5-A as one went microphonic. Do you know anything about them? Any knowledge would be appreciated.

[JC@]

RSD were rebranders. Those tubes could be almost anything, most probably made in the late 60's and 70's in the old east block.

[Pedro Vecino]

I have never known one 6L6 made in Germany (Telefunken, Valvo, Lorenz, Siemens or RFT). Is it like this one?

http://pvecino.iespana.es/v0006.jpg

This tube has been distributed in Europe by AEG, Ultron, Brimar and others in the bad times. Is a russian model 6pi3c. Regards

[luis]

Hola Pedro.
The tube seems similar but branded RSD in the glass but PAN in the boxes(not original boxes?), they seem old.
What´s your opinion about these old russian tubes in a 5e5-A circuit? They would being place instead of modern JJTesla......
I´ll post a pic of them soon....