BassmanPaul

Most of my amplifiers are happy at 2Ω. LOL

My recovery from open heart surgery was so slow and I was champing at the bit to do more. Easy does it when healing from an assault on your body even if it fixes a problem.  I trust the recovery is going well.

One thing you can say is that Peavey has always put out good sounding and reliable equipment!

For interest I took a stroll through my book of amplifier schematics. I was somewhat surprised at how many Sunn amps used the dreaded transistor somewhere in the circuit.  Reverb driver in one and tremolo in another. LOL

27 minutes ago, Bassybert said:

I’ve just had my original 90s ABM 300 15” combo serviced by Ashdown, spoke to Dave Green himself and it cost £64 including return postage, turnaround was really quick too. No one comes close on the service side of things, I’m sure they can get it sorted with minimal fuss. 

This bears out all I have heard about the company.

Then do as @Woodinblack suggests and try changing out the tube. It's likely an ECC83/12AX7 an inexpensive tube available widely. I'll bet your local music store has a few in stock.

When I first came across this thread I assumed that FMC referred to Fender Music Corp.  May I take this opportunity to apologize to Hans for insulting his products.  

I would simply return the amp and get another unit.  You could try contacting Ashdown. I hear they are very responsive to problems with any of their products.

Did the noise persist with no cable connected?

Unplug the input cable and try again. If it still does it it's the amp. If not it's the cable or what is attached to that cable.

Interesting that the tube offering uses Dynaco transformers. Back in the day several amp companies used Dynaco parts. When I first came to the Toronto area I took a job in the service department of a high end HiFi store to get the family through the winter. Via the store a side job emerged assembling dynaco kits. LOL.

But he's using the dreadful 4x10 and 1x15 pairing. It shouldn't be allowed! In an actual on stage use the 15 is greatly left behind by the more able 4x10 and eventually fails.

BTW Thank you for taking the time and effort to post that link.

How's about a link to the video?

It doesn't matter how good an amplifier is if the 'packaging' fails in normal use. The knob problem should have been discovered and rectified during initial testing of the prototypes.

The 'Top Boost' AC30 was/is arguably one of the best guitar amps ever built.

Yes all AC30 amps weighed a ton! LOL

A company has to start somewhere tha knows!

It just got to be Lactose Free 0%.

My Milkman only left milk on my door step!

Then why quote me?

4 minutes ago, Rollin Thunder said:

 

Thats the bit i don’t like 😂 

???

Back in the Sixties in my Telephone days there was a triple Darlington circuit that was supposed to monitor a line and engage a relay if a phone was lifted. It didn't work!  I realized that the ACY17 Germanium transistors had far too much leakage to ever work. I sent in an Electrical Change Order to Head office suggesting a silicon substitute and they agreed and provided BFX30 to replace them. I was left with a whole bunch of these ACY17s. 

I built a fuzz box for my guitarist of the time and he loved it. I think that I might still have a few of them in my stash of gash semiconductors. LOL

I always found it kinda ironic that all my playing career I was trying to get away from the distortions I was getting from my tube amplifiers. It took me a while but eventually I succeeded in sounding like a bass and not a low tuned guitar. LOL

All I can add is a simple 'Way to Go' from over the pond!  

Enjoy your new toy! It's great when a project comes together properly/

Back in the Sixties I borrowed an AC30B the bass version of the AC30. I was not expecting much from it but I needed an amp to play the gig. Much to my pleasant surprise the thing filled the Silver Blades Ice Rink in Liverpool. It was a sloped stage and the amp was walking down the stage but it handled everything my EB2 could throw at it!

I'll agree that the NuTube clip I found was a pleasing sound. The AC4? clip was not as clear but the amp had a little 'something' that was pleasant but a single ended Class A amp can't take you much past a practice amp and limited at that.

My own experiments into small pre-amps involves a journey into wire in double triodes. I've designed the unit but have yet to assemble it. Possibly a project for the fall.