Re: kt77-vs-el34

On May 2, 5:47 pm, Lord Valve <detri...@xxxxxxxxxxxxx> wrote:
Valvesmith wrote:
On May 2, 3:11 pm, Dave Curtis <dbaudiot...@xxxxxxxxxxxxxx> wrote:
On Sat, 1 May 2010 08:26:32 -0700 (PDT), Valvesmith

<timba.ei...@xxxxxxxxx> wrote:
Old Music Man amps have an almost 700 Volt B+

715 on the plates, last I checked.

and they work this almost any tube.

huh?

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.

ROFLMBFAO!

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
more stable.

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.

LV

Which part of my statement are you in disagreement with?
.