ES350 said:Mullard ECC83 is a nice tube---fat, a little gainy. Unfortunately, they are also a little fragile; the base is thin glass and swapping them around can break them pretty easily. I have a bunch of pulls that test good, but I also have a dozen or so with cracked bases that are toast...
+1The Golden Boy said:I think it really depends on the amp.
Lewguitar said:NOS Mullard EL-34's and Mullard 5AR4's are two of my favorite tubes. I use either the Mullard 5AR4 or RCA 5AR4 in all of my old Fenders that use that kind of rectifier tube. Tone is full and rich...the best, IMO. Lew
RiffRaff said:I'll go out on a limb and say - for most people they won't really make that big of a difference - current tube manufacturers such as JJ are making a great/consistent product - NOS tubes (especially mullards) are just so expensive they're not worth the investment on 99% of the amps on the market.