#1
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help with identification of tube
My neighbor droped off a tube to me and asked if I could try and id it. To me it looks like a 12AX7 or 12AU7 but I know next to nothing about tubes. The only markings I can make out on it are YY3 and L6K do these help to identify the tube? It also has 7 prongs on it.
I`asked him to let me know the radio it was taken out of, becase I could then search for a schematic for him....he's hecking. Thanks for your help in advance. Scott
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_____________________________________________ Music expresses that which cannot be put into words and that which cannot remain silent. Victor Hugo |
#2
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Sometimes you can blow yr breath on a tube to where it "fogs up" & read the type # etched on the glass. It may take doing that a few times, but I'll bet it's there.-Sandy G.
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Benevolent Despot |
#3
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Is it tall with "X" shaped plates inside? "YY" is the Philips code for EZ90, US number - 6X4.
Philips codes are small, often faint, usually at the bottom of the glass. And often the only identifying mark left... Thanks to Brent Jesse for this list... http://www.audiotubes.com/PhilipsCodeList.pdf |
#4
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Quote:
Scott
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_____________________________________________ Music expresses that which cannot be put into words and that which cannot remain silent. Victor Hugo |
#5
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Anyone ever try ultraviolet lights to visulize old marks?
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Audiokarma |
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