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this auction
Inside a TS-21
via brian c
"As you can see in the photo, this is the third unit produced. This unit is completely hand wired from point-to-point, and in EXCELLENT condition. This unit has an extra knob in the rear which is not mentioned in the owners manual, leading me to believe that this could possibly be an early prototype. The rear knob has an affect on the frequency of an oscillator, separate than the ones the L1 and L2 knobs control.
Metasonix has put its knowledge of tube circuitry to good use in the design of the TS-21. The unit is made up of three stages, each with its own tube: a preamp with a VCA, a pulse-width modulator (PWM), and an LFO-controlled waveshaper. Vacuum tubes are also used for the LFO and for powering additional circuits, giving you a total of five tubes in the device. Despite the tube count, however, the TS-21 has very low self-noise and gets only slightly warm to the touch.
You can find the full post on Sequence 15
"600 Bucks: So Much Money, So Little Time
images via this auction. There is also one here.
"I have one and I use it all the time it as a kind of musical "leatherman" for testing MIDI related devices, or ideas .......I've also taken it with me on Craigslist purchases so I can check stuff out before I hand out the cash....although I haven't bought much in the last year....just a T-resonator ...I don't really use it for music making much, but sometimes when I travel I throw it in the suitcase as a sound module for the laptop. .....the canned sequences, tacky as they are, are also good for for trying out chord sequences because you can chain chords together within the sequencer and get an idea what it might sound like with better equipment, more space and more time. it has 16 channels so when I need a GM MIDI sound source it is a whole lot better than the built in one from microsoft woindows.. it does eat batteries however, so I carry a power adapter when I can. The LCD is barely readable in certain light conditions too"
images via this auction
"As you can see in the photo, this is the third unit produced. This unit is completely hand wired from point-to-point, and in EXCELLENT condition. This unit has an extra knob in the rear which is not mentioned in the owners manual, leading me to believe that this could possibly be an early prototype. The rear knob has an affect on the frequency of an oscillator, separate than the ones the L1 and L2 knobs control.
