Amperite Ballast

mltube · 16th May 2010, 07:12 PM

I have an Amperite Ballast Tube Type 8-4.
I haven't had any luck finding data on the net.
Would anyone happen to have the information or know where I could find it?

Thank you

bob91343 · 16th May 2010, 11:07 PM

I had all the data on those tubes and gave it away a couple of months ago. Maybe I'll ask the guy for it back and scan it for you.

Basically those were current regulators, often used in heater circuits to compensate for unstable power line. We mostly don't have that problem any more, so those have fallen out of favor.

Ballast tubes in general were used as dropping resistors for heater strings in consumer radios, especially small ones, back in the 1930s. They also used resistance line cords.

bob91343 · 4th July 2010, 11:39 PM

I found the data! If you want the info, let me know.

16th May 2010, 07:12 PM	#1
mltube diyAudio Member Join Date: Feb 2010 Location: Fergus Falls, MN	Amperite Ballast I have an Amperite Ballast Tube Type 8-4. I haven't had any luck finding data on the net. Would anyone happen to have the information or know where I could find it? Thank you

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16th May 2010, 11:07 PM	#2
bob91343 diyAudio Member Join Date: Mar 2010	I had all the data on those tubes and gave it away a couple of months ago. Maybe I'll ask the guy for it back and scan it for you. Basically those were current regulators, often used in heater circuits to compensate for unstable power line. We mostly don't have that problem any more, so those have fallen out of favor. Ballast tubes in general were used as dropping resistors for heater strings in consumer radios, especially small ones, back in the 1930s. They also used resistance line cords.

4th July 2010, 11:39 PM	#3
bob91343 diyAudio Member Join Date: Mar 2010	I found the data! If you want the info, let me know.

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