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JTM pre-amp valves [message #27090]

Tue, 05 July 2005 04:20

Matt5104
Messages: 1
Registered: May 2009

Esquire

Hi, I have a JTM612 with 2 12AX7s, 1 12AX7EH and 1 marshall ECC83 in the pre-amp. I'm considering replacing them all with mullard ECC83s. Can I literally just replace them and power up the amp, or do I need to re-bias the amp? Also, does anyone know the best order in which to place the original valves in the pre-amp? I've heard that putting the 12AX7EH in V1 (first valve position from right to left) is best, but i'm not really sure! Thanks very much.

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[Message index]

		JTM pre-amp valves By: Matt5104 on Tue, 05 July 2005 04:20
		Re: JTM pre-amp valves By: Damir on Thu, 07 July 2005 15:56
		Re: JTM pre-amp valves By: Thermionic on Tue, 12 July 2005 09:24
		Re: JTM pre-amp valves By: Damir on Tue, 12 July 2005 13:50

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