12ax7(ecc83) and 6n2p 12ax7...........differents?? - diyAudio
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Old 26th January 2013, 07:40 PM   #1
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Default 12ax7(ecc83) and 6n2p 12ax7...........differents??

hello guys...just ask something the 12ax7 is different with 6n2p 12ax7??????????????????? help....bought or not
?
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Old 26th January 2013, 08:12 PM   #2
DF96 is offline DF96  England
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12AX7 and ECC83 are virtually the same, although in theory a real ECC83 will always have a low noise spiral-wound heater; a 12AX7 might not, although many actually do.

6n2p is a similar Russian valve, but with different heater arrangements. To use it in a 12AX7/ECC83 circuit you need to rewire the heaters.
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Old 26th January 2013, 08:14 PM   #3
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ECC83/12AX7
1 = A 2 = G 3 = K 4 = Htr 6.3V 5 = Htr 6.3V 6 = A 7 = G 8 = K 9 = Htr Centre tap 0V

6N2P
1 = A 2 = G 3 = K 4 = Htr 5 = Htr 6 = A 7 = G 8 = K 9 = Scrn

The Hfe and noise figures are similar to ECC803, better than ECC83

The heater of 12.6 vbolts across 4 & 5 with a centre tap at pin 9 is the difference. Rewiring of the valve base will be required.
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