The first is a FET, not a tube. The second sure looks like a 12AT7, though I wonder if the X got pulled out of context.
Gday.
Yes. wrong number from the clipboard,
the first one should have been 7025.
>XECC81. i was refering to the phono prestage
by Aleksandar Kitic
http://tubeaudio.8m.com/Rpa/rpa.html
Yes. wrong number from the clipboard,
the first one should have been 7025.
>XECC81. i was refering to the phono prestage
by Aleksandar Kitic
http://tubeaudio.8m.com/Rpa/rpa.html
7025 is a selected version of 12AX7/ECC83, supposedly for lower noise. Looking at the schematic, the "X' in XECC81 is most likely spurious.
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