Home OTL Asylum

OTL, Output Transformerless Amplifier User Group.

Fahrenheit or Centigrade?

I assume you are talking in Fahrenheit. I used the temperature probe on my Fluke meter to measure the glass temperature on the type 7241 output tubes in my MA240s, which originally sported 6C33Cs. At or near the top of the one tube I measured, I got 100 degrees C. I now cannot recall whether the tubes were allowed time to reach a steady state temperature, either. The 7241 draws 7.5A filament current and idles at 400mA in my amplifiers, with plate voltage = ~130VDC; they can easily take 500ma idle current at that plate voltage.


This post is made possible by the generous support of people like you and our sponsors:
  Kimber Kable  


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.