Manley 300B preamp

I've retubed my Manley preamp to be synergistic with the retubed Manley 250 amps running Maggie 20.1. I realized early on that I could make some significant changes in the sound and found a match that works for me. The amps are running:

SED EL34, GEC A2900, RCA 12bh7 blackplates

The 300B preamp now has:

EML 300B Mesh, Philip miniwatt Metal base gz34, Brimar 6sl7gty and RCA OD3.

Still have a set of Western Electric 300Bs, but the midrange was too rich and colored. The EMLs really clarified the midrange.

Mtrspt5, it seems you have a great system. I'll check out some more about the EML 300B mesh. Could you swap in the EML directly or was it necessary to adjust bias?

My local tube dealer talks positive about the Golden Dragon 300B mesh. Any experience with this one?

I'll also check out the Brimar 6sl7gty.

I've read somewhere that you have to check out if your amp (in my situation: preamp) can swap directly to EML 300B mesh. That this 300B works best under specific conditions. Mtrspt5; how is this with Manley 300B, did you have to adjust bias in order to use the EML mesh?

Musicophile,

Sorry for the delay in my response. I did not have to do any bias change to the tubes. They work great in the preamplifier-very under stressed.

Mtrspt5: thanks, good to know that you don't have to adjust anything because of EML. However, I have just got a pair of Psvane 300B grade A from Grant Fidelity (great service) that need burn in time And, from my experience with Black Treasure it will take some time. At the moment I'm at holiday; so I'm abstinence after some listening on my system :-(. And since you have a Manley power, like me, that uses EL34 I can tell you that I also ordered a pair of quads of 6ca7 Black Treasure. So as you probably can understand, I'm eager to check out my system.

At the moment I only use a pair of Golden Dragon 6SL7 in the preamp. So I could check out your Brimar; is this the best choice?