Lots of info here; http://www.audiotubes.com/PhilipsCodeList.pdf
and here; Mullard, Philips, and Valvo Tube Codes
and here; Mullard, Philips, and Valvo Tube Codes
A picture would help us. Preferably in focus. Also a picture of the metal innards.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Sorry , no focus in "Y" and "5". Paint.
An externally hosted image should be here but it was not working when we last tested it.
Now is Ok. "Y" and "5" (Five is inverted)
An externally hosted image should be here but it was not working when we last tested it.
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