Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on June 15, 2012, 05:32:57 am

Title: Amperite 6-4 --- What is this ?
Post by: kagliostro on June 15, 2012, 05:32:57 am

The box is labeled Amperite 6-4 Resistor Current Regulating

it has an octal base but clearly isn't a tube (on my tube tester only as to make photo)

which was the use for this "lamp" ?

I would like to see schematics that use it as to give me an idea about it

Thanks

K

Title: Re: Amperite 6-4 --- What is this ?
Post by: sluckey on June 15, 2012, 06:31:10 am

It's exactly what it says it is...

http://www.amperite.com/assets/Documents/Ballasts.pdf (http://www.amperite.com/assets/Documents/Ballasts.pdf)

Title: Re: Amperite 6-4 --- What is this ?
Post by: kagliostro on June 15, 2012, 07:05:47 am

Ach so !

So the regulation is due to the fact that the filament has a positive temperature coefficient of resistance

Thanks Sluckey

K