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I have to commend people who post mods and are capable of modifying their amplifier but I'm not one of them. The best solution I found for a tighter recto is to buy a Siemens E83CC triple mica for V1.

You're not stupid unless I am too. I have a Mark III blue stripe combo and I run a Mesa Diesel bass 1x15 with the EVM15L in it and I love it. I seen a cheap 1x15 for sale and when I looked at speaker specs for the EVM12L and EVM15L they were very similar so I gambled on it. Got that low end...

I know when a preamp tube is at the end of its life it can sound horrible but what about when people advertise it at like 65% or 90%? Does it sound the same as when it's new? Does it gradually degrade in sound quality as it's used?

Thank you for explaining it like that. I wasn't sure so I thought it was best to ask before doing it. Thank you for the information. I was originally going to try to get all these old NOS rectifier tubes to make sets but it's cheaper and easier for me to just mix and match brands of 5U4G.

For example can I mix different brands of 5U4G? Could I mix 5U4G with 5U4GB? 5U4G with 5AR4?

Thank you very much for clarifying this with such a quick response!

So I've seen this in the Rectifier manual and I was wondering if someone could help explain this statement better.... "NOTE: Due to the RECTO’S extreme gain potential, the highest regions of the GAIN Control may possibly push the pre-amp tubes past what they can handle, producing microphonic...

I've done extensive tube rolling in my Mark III simul-class blue stripe and my favourite set is: V1 Tesla E83CC, V2 Siemens E83CC, V3 RFT ECC83, V4 JJ ECC83, V5 Sovtek 12AX7LPS in the pre amp section. Winged C EL34/6L6GC or all Tung Sol 7581a for the power section.

Yes it is simul-class Markedman. I run EL34s currently but I was tempted to try E34Ls for more power but I've heard other amps having problems with them and didn't want to take the chance.

Thank you very much Domct203! I heard horror stories about the Peavy XXX having problems with these due to screen resistors and didn't want to take a chance.

So long as their within the proper range for current draw obviously?

So long as their within the proper range for current draw obviously?