Headroom, Chokes, and Transformers -- Tweed Pro, Super, and Bandmaster

I don't quite understand why you want to build a Weber kit, and replace the primary parts, xformers. Why not scratch build what you want?

That said, the difference in volume from 20 to 15 watts is almost nothing. Why not just build it as spec'd and use an attenuator?

 

Plus, if you try to restrict your output power by deliberately undersizing the OT, you'll definitely have reduced bass response and maybe some splatty-sounding distortion too.

Shea

 

I have used their twin sized iron in a high power twin and it sounds killer

 

Honestly, you won't hear much difference in the power output. Running 6L6's and 6V6's at the same B+ voltage will only be 2-3 Db difference in power.

You might think about a switch. You could lower the B+ a tad for the 6V6's.

 

I agree with the other poster... if you are going to get a kit, then change the
parts that make up 60% of the cost of the kit, why not build your own, or
get someone to build you a kit with those parts already?

Secondly, lowering the choke inductance will not lower headroom that much,
if any, and you will end up with less bass, and less of other things you want.

I suggest either a lower B+ switch, or triode mode switch, or change the front
end plate resistors and cathode resistors to put it totally symmetric, but at a lower
bias point for less gain. This will give you more control over headroom...

Just my $0.02.

 

If I were you, I'd just build a normal tweed Pro or tweed super, and just swap between 6L6s (or some nice old-school 5881s) and 6V6s. That's what I do with a 5F8A twin clone I made. The volume drops just enough to make the difference between insanely friggin' loud and just really loud. Just make sure the 6V6s can handle the B+ voltage - when in doubt, use JJs.

Shea