Description
We developed this power supply for our TCLA and AIKIDO preamps as each of these use four tubes, and as a result a power supply with higher current ability is required. This power supply replaces the original PA211 power transformer as well as ALL associated power supply components, except for the 12X4 tube rectifier. Even though 95% of this power supply is solid state, we call it the analog version as it retains the 12X4 tube rectifier. For our 100% solid state regulated power supply that also does away with the 12X4 rectifier tube, please see below, kit#8.
High voltage B+ for the preamps as well as DC filament for the tubes are both regulated using solid state voltage regulators giving 100% stability and super low noise performance. It comes complete with its own two power transformers, both of which fit on the PCB. Quality metal film resistors, film and electrolytic capacitors are standard with this kit. The PCB is manufactured to FR4-TG standards with ground planes on both sides to improve screening as well as component screen printing to make assembly easier. A set of assembly instructions is also included. However the tube is not included. Please note that the photos are a general indication, and component colors and style can and will vary.
An important note about using this regulated power supply: it will NOT work with our clone PC5 & PC6 upgrade kit,
or original Dynaco circuits, due to a quirky way that Dynaco tied one end of the phono preamp tube filaments to main power ground, which does not agree with the way the DC filament regulator operates.
