Home Tube DIY Asylum

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

RE: Power transformer for stereo 211 PP

If you are planning a cap-input filter, the rms current will be around twice the DC, so more like 386 V-A for the HV windings.

If you are having a custom transformer made, you might want to hold the magnetic induction to a lower value than the standard 16kgauss; this will reduce the core losses, radiated magnetic hum field, and vibration. You can ask for a 50/60Hz design which will be around 13kgauss at 60Hz. Personally I like to go lower, 10 kgauss or less. IIRC, Marantz ran at 8kgauss. In any case, make sure they understand this is for an audio amplifier, where hum pickup is a concern.

Between these two effects, the transformer would be quite a bit larger.


This post is made possible by the generous support of people like you and our sponsors:
  Signature Sound   [ Signature Sound Lounge ]


Follow Ups Full Thread
Follow Ups

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.