This is in the process of being built now. it is basically a Williamson but updated and improved using modern components. Copies would be between £4,000 and £5,000. And you’d have to have it without the Avro-Lancaster-T1154 meters, as I only have one more,
I designed the entire transformer set of four myself, and they were specially wound to order by a good maker in England. An identical set would cost about £1,000 of the total price, like a Bentley or an Aston Martin. You could have lesser ones of course, which would work perfectly well, like a Peugeot, for less than £500 of it.
The specifications are as follows:-
(1) Two channels, VERY conservatively rated at 50Watts RMS per channel.
(2) Total Harmonic distortion <0.7% between 30Hz and 30KHz.
(3) Outputs to speakers 4, 8 or 16 ohms.
(4) 40-volts DC aux power supply for preamp using valves or transistors.
(5) variable or removable neg-feedback.
(6) Front-panel meters from recycled Lancaster bombers (you will not be able to have any more of this pattern as this was the last pair I owned, but others could be subbed.)
(7) Optional high-voltage-delay for valves (heaters on first).
Those of you who knnow about audio/HiFi and valves also know that there is a certain indefinable something about the valve sound. Yes of course transistor amps are perfectly faithful to the signal and in some ways even more reliable and responsive, but …. it’s not like that entirely. Valve stuff just, well, sounds better to the human ear.
If you would like a Williamson, get in touch. I am happy to make it entirely to your order, and will quote bespoke accordingly. In a recession, Libertarians have got to do what they have got to do.