Supplying Power To A Mullard Vacuum Tube

**ScienceNerd36** · Nov11-09, 10:59 AM

How would a curious young gentleman like myself go about supplying power to a Mullard vacuum tube? I have several different types of Mullard tubes, but no idea as to how I can generate the electron beam.

P.S. If side-effects of solution include death, injury or Hannah Montana please do not post.

**Bob S** · Nov11-09, 04:38 PM

I had a pair of Mullard EL-34 pentodes as the final push-pull stage in a big vacuum tube audio amplifier. As I recall, the plates ran so hot that they turned red. See
http://upload.wikimedia.org/wikipedi...llard_el34.jpg
http://en.wikipedia.org/wiki/EL34
Here is a data sheet
http://www.drtube.com/datasheets/el34-philips1969.pdf
Max plate current, voltage is 100 mA, 250 V
http://www.eierc.com/rc/EL34.htm
The difference between the max supply voltage and anode voltage is the cathode bias resistor IR drop from cathode to ground.
Finally found a Mullard datasheet for EL-34:
http://www.hifitubes.nl/weblog/wp-co...llard-el34.pdf

Bob S