yes bud ive sorted it, the grid voltage on the valves was causing it, only when reciving a small input,, put a small cap(100 pf) across it to remove noise and screened the pre with some makeshift tin foil. NOISE GONEand scope saying its clean

thanks dude

 

Nice one Lee. Seems you know your stuff

Tin foil is so versatile !

I dont suppose you have any pictures of the valve amp ?

 

Simon will get a pic up as soon as i can

 

this is the kit i built got pic off instructions as i cant get downstairs to take a pic of mine but you get the jist etc..

 

Lee, Yes I know that one.. Its a Velleman kit. Nice one.

I have a few old valve amps about the place but just cant get the tubes anymore !!

MOSFETS are the future..LOL

 

Thread cleaned up.

Anything off topic will be removed.

 

AJ can you remove your reply then? !

 

i bet i could find equivelent valves might just need a few small changes at component level.

mosfet is old hat tho bud.... lol its all about class D switch mode now for big stuff check out the lab gruppen La6400 switchmode 3.2Kw per ch into 4 ohm holy moly

 

Lee,

Yeah I will see if I can find out the valve types.

It has been a while since I was into audio technology and switching tech is getting everywhere in PSU's so I guess its an inevitable transition there.

3200w into 4 ohms per channel....I want one of them bad boys !!!!!!

 

once had10 racks with 6 in each for wembly arena so 60 6.4K power amps... ohhh it was good lol

 

LOL, I cant beat that

Our main room has about 14k comprising of MC2 and JBL amps.

Love the MC2 amps, 6 years old and never had a problem and they get a proper lashing every weekend for about 8 hours continuous.

I think the MC2's deliver 1800 into 4 ohms per channel and 3600 into 2 ohm bridged but they have a big toroid transformer in them so weigh a ton !

 

MC squared amps are not stable at 2 ohms, ive set 2 on fire b4 running 2ohm of sub flat out they didnt like it, great sounding amps tho. like to hear it at 14K

 

Wow ! Surprised to hear that

Mine are only run in stereo mode so never had any issues.
They do sound good and seem to like to be worked hard though !

I will take some pictures of the rack and post up later.

 

Lee, forgot to ask you about you opinion on the Behringer Ultradrive Pro Digital Crossover ?

http://www.behringer.com/EN/Products/DCX2496.aspx

Looking to get 4 of these to replace all our antiquated Cloud limiters and crossovers !