- From: Valvesmith <timba.eisen@xxxxxxxxx>
- Date: Mon, 3 May 2010 07:04:28 -0700 (PDT)
On May 2, 5:47 pm, Lord Valve <detri...@xxxxxxxxxxxxx> wrote:
On May 2, 3:11 pm, Dave Curtis <dbaudiot...@xxxxxxxxxxxxxx> wrote:
On Sat, 1 May 2010 08:26:32 -0700 (PDT), Valvesmith
Old Music Man amps have an almost 700 Volt B+
715 on the plates, last I checked.
and they work this almost any tube.
Mine ran fatboy 6CA7s for a couple decades. EL34s didn't last for a
couple months. I've also heard that 6L6s need to be pretty tough or
they croak early, too.
Yet a Marshall JCM900 needs a dinner date and a new
purse to bias proper. Is it the tubes? I think not.
You're comparing apples to doughnuts.
BTW, I haven't had problems biasing JCM900s...
I never have problems with 6L6GCs. Now I bias at 70% of 14W of plate
dissipation. The JJ 6L6GC data sheet says it will do 30W max. But if
you look at typical spec, is 70% of 14W.
Last week I set up a JCM900 at about 50% plate dissipation, because
that is were it was happy. The week before I set up a JCM900 with a
Mercury Magnetics choke, at 70% plate dissipation is was cooler and
Yep apples to doughnuts, cause the Music Man will run in class-B and
still sound good. The JCM900 needs modified to run properly in class
A/B with EL34s. Or a set of KT77s.
Absolutely bonkers. Must be posting from the laughing academy.
Which part of my statement are you in disagreement with?