Universal Stereo Tube Output Stage (UTS)
Design and performance
Complete module including the specially designed over spec power transformer for 115 to 240 V operation. Hybrid anode follower with circle of two CCS using ECC88/6922/6DJ8/6H1/6CG7 (not included); S/N ratio > 100 DBA, 2V RMS into a 10K THD is around 0.1%, 20 Hz to 20 KHz <-0.5db, output minimum 10V RMS on clip into 10K load <1% THD, output impedance is 75-100 ohm; Also includes Obbligatto coupling capacitor.
one board can do stereo RCA output tube stage for a DAC, two boards can do balance output tubes stage DAC. One board could make a nice simple line stage, two boards could be configured as a balanced line stage, or an RC RIAA between two boards would make a nice phono stage with about 40 DB of gain, or two boards with a 10K LCR and a 10K termination resistor would be an easy way to build an LCR phono stage.
ECC88/6DJ8/6922/6H1/6CG7 only. Do NOT fit 6H30 or 6H6
140 mm x 80 mm x 45 mm
Here is the manual in all of its glorious 39 pages! It gives detailed instructions for using the UTS as a voltage or current output DAC, single ended or balanced line stage with 6 or 12 DB gain, and instructions to implement as a moving magnet single ended stereo RIAA EQ preamplifier. In addition to the instructions provided it is also possible to use the UTS as a single or balanced tape head stage, classic high gain two channel transformer coupled microphone preamplifier, and input and summing amplifier such as a classic tube mixer.
NOTE :This is for the purchase of the module without the power transformer, without 2.2uF coupling caps and without the tube.