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Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy
Executone PB 385-03 6550 tube amp Big and Heavy

Executone PB 385-03 6550 tube amp Big and Heavy

$ 158.4

  • Brand: Executone
  • Country/Region of Manufacture: United States
  • Model: PB-385-03
  • Type: Tube Amplifier

Description

This is an Executone PB 385-03 Tube Amplifier. These are push pull 6550 units that were designed to run 24 hours. This is not some wimpy HiFi unit made to run a few hours at a time. These were made to last. This appears to be the Big Brother of the other Executone units that I see on eBay. I'm selling this as parts only, no implied warranty. That said, the power transformer does show proper continuity as it should. The fuse (5 amp!) is intact which is always a good sign. I did plug it in (without a rectifier tube) and got 539 vac off the 5U4 rectifier socket pins. I measured 302 vac from the 5Y3 socket pins. Yes, this unit does use both a 5U4 and a 5Y3 for a mono amp. It's something of a beast. The laminated plates of the power transformer measure 4.5" x 3.75" x 3.5". That's just the plates. The heater windings to the rectifier and to the 6550 and small signal tube bases are as per the schematic as well. The output transformer primary measures 64Ω and 52Ω referenced to B+ center tap. The secondaries show proper continuity. That's all the testing I did. As stated, no warranty but I'd bet that it works though common sense says replace the caps and check everything out in some detail before trying it out. This was an Estate sale find. If I had two of these I'd build a pair of matching units. I think this is the only one of these that I have though and I really need the shelf space so I'm moving this one out. No tubes included. Only what's pictured. The unit does have the full base with schematic. Standard rack mount 19" basing. It's 6" wide and 6.5" tall at the highest point. Need a project? Here you go. With 539 vac, prudence should be your byword. Qualified builders only please. Yes, I do pack securely.