  ***PLEASE SEE UPDATED VERSION*** These Power Supply boards replace the original can capacitors in Dynaco ST70. Fit on standoffs under the output transformers, no cutting or drilling required to install, just bolt in, hook up the wires and go! This ST70 capacitor board kit replaces the original aluminum can capacitor and increases capacity from the original 30-20-20-20 to 50-160-50-50 uF at 500V, and also replaces the bias supply capacitors & diode as well. Either 5AR4/GZ34 tube rectifier or solid-state diodes may be used. One board is required per amplifier. Note that if you buy a blank board, the board capacitors must be snap-in radial lead types and on the ST70 board cannot exceed 25mm high by 30mm diameter, in order to fit under he chassis. In all cases the first section should not exceed 50 uF if a tube rectifier is used. One can use these boards for homebrew projects, any Panasonic TS series (or equiv such as Sprague 80D or 82D) that don't exceed diameter limits can be used, taller ones can be used if you have clearance. Capacitors supplied with the board + parts kits are Panasonic and/or Chemicon parts temperature rated 85 C. |
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