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The production run is finished. Ask Big City Music about purchasing.
Think of the T1 as a primitive box containing 3 screaming children, being punched in the face to the rhythm of the internal sequencer or user supplied (this means you!) control-voltage source. These screaming voices are generated by the thyratron VCOs that are staring at you right now (you do like to read the manual while you have the unit in front of you, right?) The VCOs are modified RK7 modules, okay?
The knobs control the amount of strangle of the screaming voice. Turn them to the right for higher pitched screaming, and turn to the left for a tighter strangle and more choking. They go thru a mixer/mangler similar to the RK3 module, thence thru a bandpass filter similar to the RK4, then to a lowpass filter/LPG similar to the RK6. Finally there is a pentode VCA on the output, and one envelope generator to control either it or the LPG, selectable by the toggle switch between the LPG and envelope. There is only ONE envelope on this bastard thing, because it’s supposed to be as primitive as possible. If you want to sweep the filter or suchlike, or you want an “LFO” thing, use the sequencer to do it. Or use external control-voltage sources. There were no such things as “envelope generators” or “LFOs” in the 1950s.
You can control the pitch of the VCOs in three internal ways: the short ribbon controller at the extreme left; the 13-key keyboard, where each key has a trimpot to adjust its pitch so you can have any scale you want; and an 8-step analog sequencer.
link to PDF user manual
Generally the T1 is a terrible, unruly, bad-tempered monster. A bit like an evil Music Easel. It is difficult to build because the thyratron tubes for the VCOs must be matched, and finding three of them to track reasonably well is a difficult and time consuming job. Tubes are evil little bastards that waste power and change in electrical characteristics as they age. This is why many controls have large “dead areas” in their ranges; we have to allow for tube drift and aging.
You can’t get more hardcore than this. US suggested retail price is $10,000. (Don’t like it, buy a Knifonium and piss off.) The T1 is an exclusive for Big City Music. A very limited number will be made.