12ax7(ecc83) and 6n2p 12ax7...........differents??

plig88 · 26th January 2013, 07:40 PM

hello guys...just ask something the 12ax7 is different with 6n2p 12ax7??????????????????? help....bought or not
?

DF96 · 26th January 2013, 08:12 PM

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.

Harleyjon · 26th January 2013, 08:14 PM

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.

26th January 2013, 07:40 PM	#1
plig88 diyAudio Member Join Date: Jan 2013	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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26th January 2013, 08:12 PM	#2
DF96 diyAudio Member Join Date: May 2007	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.

26th January 2013, 08:14 PM	#3
Harleyjon diyAudio Member Join Date: Dec 2012 Location: England	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.