Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

RE: Cool old RCA 2a3 PP schematic.

Hi, amnesiac. The RCA theater amplifiers from 1939 were mostly
P-P 2A3 and sometimes 45. In the Deluxe houses these amps
which took up most of rack or more would drive a power amp
consisting of an input transformer and P-P 845. These classic
amplifiers have a lot of soul. Motion picture bandwidth topped
out at 10,000 Hz. It is a matter of speed of soundtrack past
the sound head. 24 frames per second translates to roughly
90 feet per minute. There was some experimentation done using
ultra-violet light and special optics in the sound camera to
push the high end a bit. It worked but did not become a standard.
This schematic is nice inspiration and a good place to start.



This post is made possible by the generous support of people like you and our sponsors:
  The Cable Cooker  


Follow Ups Full Thread
Follow Ups
  • RE: Cool old RCA 2a3 PP schematic. - elektron 05/31/1411:53:54 05/31/14 (0)

FAQ

Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.