Caline P5 Isolated Power Supply 5 Output DC9V 12V 18V Effect Pedals with Short Circuit Protection Category_Straps The SOV-1 used no vacuum

The SOV-1 used no vacuum tubes

Tuning accuracy: More or less 0

On/Off: POWER switch

and endpin jack PSY-BAA-MAA Presys II with Sonicore pickup

Caline P5 Isolated Power Supply 5 Output DC9V 12V 18V Effect Pedals with Short Circuit Protection Category_Straps The SOV-1 used no vacuumThis is a true isolated PSU without a wall wart. It has 5 isolated power section with switchable voltage. You can test that each section's ground are isolated. Guitar Pusher backs it up with 1 year personal warranty. This is a great alternative to some Voodoo Labs or Cioks PSU. You need this if you are running mixed analog and digital effects and experience noise in that setup. Note that noise can also be caused by bad AC power or low quality cables