6BL7 rA in PP

nafunga · 16th January 2007, 09:17 AM

Can anyone help please with the optimum transformer primary impedance for double triode 6BL7 in PP, on 300v HT?

Thanks.

revintage · 13th June 2007, 09:06 PM

24k for one tube 4W, 12k for two tubes 8W, 8k for three tubes 12W etc. etc......

16th January 2007, 09:17 AM	#1
nafunga diyAudio Member Join Date: Jul 2005 Location: Whitstable , Kent. UK	6BL7 rA in PP Can anyone help please with the optimum transformer primary impedance for double triode 6BL7 in PP, on 300v HT? Thanks.

13th June 2007, 09:06 PM	#2
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	24k for one tube 4W, 12k for two tubes 8W, 8k for three tubes 12W etc. etc...... __________________ Brgds Lars

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