Looking at the layouts, the 18 watt and the 20 L&B seem to use the same power transformers.  Input can be 120 or 240V, and output is 290 or 3.15 V.  I'd rather not have a heavy transformer shipped from abroad, when I can get one in the US.  Looking at the Mojotone site, which is the distributor (I think) for the Heyboer transformers, they have a transformer for the 18 watt that has outputs of 290 (two of them) and 6.3 (one of them) volts.  Would this transformer work?  3.15 is half of 6.3, so maybe I'm just looking at the specs wrong.  If this won't work, can anyone recommend inexpensive but high quality transformers readily available in the US?  I'd rather not spend $ on a MM transformer.

As a second question, is it possible to build this amp as is, but with an additional jack to bypass the preamp, so that I can use other preamps with it?

Thanks

I'd like to see an alternative to the standard 20 Lead and Bass with the following features:

Most importantly, TMB controls.

Lighted power switch, so that front panel real estate doesn't need to be taken up with a light and a power switch.

No standby switch.

Separate jacks for 4,8,16 Ohms for the speakers.  No rotary dial.

As icing on the cake, but not necessary, another line-in jack that bypasses the preamp stage.



Thanks

I think the 20 watt lead and bass might be the amp for me. I'd like the ability to sculp the tone a bit more, though.
 Is there a way to add a tone stack, or would I be better off using an EQ pedal? Thanks.