Recent content by Jorn218

Yes but is tye bias circuit running at a reduced voltage reducing the bias to be even colder or does it run at normal values as if not reduced? That’s my line of thinking.

I’ve read the same. But my interest is not using Spongy but keep the amp on hold, lowering the voltage to the primary then biasing the amp to correct stock spec. You can’t lower the supply too much and still get enough electricity to be able to do this. I’m also not after Van Halen tone...

Neither do I except I now installed a trim pot to dial in to correct bias as per stock spec.regardless of where I purchase tubes as sometimes you can request if they will work in a Mesa amp.

I get that but you can still bias for dissipation at what you get on the plates. So for example your shooting for 60-70% dissipation at 100watts from wall voltage, well if you reduce the supply so your max wattage is now 55watts for example, you still bias as normal but have to use the voltage...

The story was that since Ed ran everything wide open all the time, he would blow tubes if the amp was a wall voltage which maxed out in the late 70s around 115-120. To keep him from doing this, he ran it around 90VAVC then rebiased the amp at that voltage giving him the trademark tone. The...

I can imagine. For a time I had a JCM800 clone built using an old Bradshaw circuit mod I got from a guy on Metro forum. I used a Heyboer PT that was supplying around that as B+. Essentially all the circuit mod was to push the amp just barely on the safe side of running off the rails. The only...

Dom, the Spongy switch also takes in consideration for lowered power to the heaters as well? I was under the assumption that this switch just drops the voltage globally making the whole amp run colder and that even the heaters are running with lowered voltage ie the bias is even colder than...

I’ve been listening to the Tone Talk podcast as of late and in one episode Dave Friedman explains exactly how EVH ran his variac wig his amps. What Van Halen did, if you did not know was to take a variac and drop incoming voltage to the amp to around 90VAC instead of the 110-115VAC that was...

That faceplate is totally sick.

The answer is that they don’t. The interaction of the tone controls with the global volume master and channel masters can dial in a fantastic tone that is very percussive.

You guys must be rolling in dough. Mesa’s are expensive I’m not talking about the sale value either. Expensive to maintain aside from tubes. Not many work on them and in my state I wouldn’t let the techs from my region or te region to my north work on mine if they paid me. Maybe the Dallas...

Here is some photos of mine. Not necroposting. Archiving for whoever needs the info. Photos are here.

Thank you. Yes for a while life was having fun kicking me in the nuts over and over.

Oh it’s me I know about multiple sources fo backups. There were. Just. Spread across 3-4 hard drives within one box. Yeah I know….. Been essentially a hobo for past three years. Luckily that computer main board is shot as it won’t power up enough to spin the drives. I can look at the data...

Playing with firebottles and electric sorcery