Building a Jansen 4/TWELVE SPECIAL copy (COMPLETE)

[Bg]

The blue tolex is nice. There's enough black and tweed around the place already

and banned....

[Jay]

vinyl is a complete PITA to apply, you'll find the tolex much easier and it will turn out much better.

Yes, I don't know why I went that way Anyway, there's always the TolexMeister just across the border

[Bg]

vinyl is a complete PITA to apply, you'll find the tolex much easier and it will turn out much better.

Yes, I don't know why I went that way Anyway, there's always the TolexMeister just across the border

Its easier to obtain... some is workable but the majority just doesn't want to conform. Then the backing comes off etc etc...

But I know that because, I've tried the same.

[Jay]

The original Jansen 4/Twelve does have a spare triode, not used for anything which seems a pity...

So finally I managed to put that triode to use and made the following changes:

• extra gain stage using the spare triode (separate bias and gain controlled by its own potentiometer)

• introduced more gain in the V2 section

• put in a Master Volume pot

These changes transformed this amp into a different beast. It can now roar with the growl of a grisly bear or wail like an old woman moaning about her lost beauty

Five knobs to fiddle with

Five knobs - 20210223_132818.jpg (360.64 KiB) Viewed 339 times

[Slowy]

These changes transformed this amp into a different beast. It can now roar with the growl of a grisly bear or wail like an old woman moaning about her lost beauty

Five knobs to fiddle with

Oh well, I still have the original.


Keen to hear it.

And if you're still up for a challenge, I have two other stunning amps for you to clone.

[Jay]

These changes transformed this amp into a different beast. It can now roar with the growl of a grisly bear or wail like an old woman moaning about her lost beauty

Five knobs to fiddle with

Oh well, I still have the original.


Keen to hear it.

And if you're still up for a challenge, I have two other stunning amps for you to clone.

Sure, but it should be heard with your speaker, not?

Let me know when you are free. Happy to drive your way if that is convenient.

ps1 - I had to change V1 from the AX7 to AY7 to tame the beast a bit. Before that it behaved even more brutal.

ps2 - always up to challenges, but a few too many on right now

[Olderama]

These changes transformed this amp into a different beast. It can now roar with the growl of a grisly bear or wail like an old woman moaning about her lost beauty

Five knobs to fiddle with

Oh well, I still have the original.


Keen to hear it.

And if you're still up for a challenge, I have two other stunning amps for you to clone.

Sure, but it should be heard with your speaker, not?

Let me know when you are free. Happy to drive your way if that is convenient.

ps1 - I had to change V1 from the AX7 to AY7 to tame the beast a bit. Before that it behaved even more brutal.

ps2 - always up to challenges, but a few too many on right now

Lol you know your getting old when you struggle to read the PS2

[bender]

Oh man, I’d be super keen on a clone of this.

[Jay]

Oh man, I’d be super keen on a clone of this.

That can be discussed, but I would like to do a couple then at least to make it more economical.

You did play the original one at the bollix which sounded superb and which then started this cloning process

Come and try the modded one to see if you like this variant of 3 mutations...

[Slowy]

Oh man, I’d be super keen on a clone of this.

You need to play Optimus first.
Seriously.

[StrummersOfThunder]

Warm feelings

[Slowy]

Warm feelings

Nowhere near enough headroom for you, I reckon.

[bender]

Oh man, I’d be super keen on a clone of this.

You need to play Optimus first.
Seriously.

I have! I loved it. But it was skull crushingly loud. Also, less cloneable.

[bender]

Oh man, I’d be super keen on a clone of this.

That can be discussed, but I would like to do a couple then at least to make it more economical.

You did play the original one at the bollix which sounded superb and which then started this cloning process

Come and try the modded one to see if you like this variant of 3 mutations...

I’d love to!

Also, I already have a tweed style cab if one could fit nicely in that format.

[Jay]

Warm feelings

Nowhere near enough headroom for you, I reckon.

There's heaps for intimate settings, just 'dime' it to 11 for extra warm feelings