Home Tube DIY Asylum

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

RE:I have a 200ma Fluke or something like that.

Using a ma meter as a ma meter should be straight forward, but not all ma meters are created equal, some expect you to know to put in a shunt resistor but others have this built in. Use a battery and a resistor, figure out current and put the meter in series, if it reads correctly (you can verify with a digital meter), then fine, just insert it. That being said, I'm always nervous of wires and screw terminals coming lose so I put a shunt to ground, like 100 ohms. The small resistance of the ma meter will swamp that resistor in normal practice, but if the meter connection opens, the output tubes will not red-plate.


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


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.