Fusion Message Board

In this space, visitors are invited to post any comments, questions, or skeptical observations about Philo T. Farnsworth's contributions to the field of Nuclear Fusion research.

Subject: Re: Diodes?
Date: Sep 23, 1:00 pm
Poster: Richard Hull

On Sep 23, 1:00 pm, Richard Hull wrote:

I almost forgot. If the diodes are really slow and have a wide divergence in cutoffs, placing capacitors of about .001ufd across each diode and resistor will help to shunt the vlotage rise across an early turned off diode.

Thus, for super protection against all faults exept power overload in diode strings, each diode should ideally have both shunt resistance and capacitance. These are absolute must haves in really long strings, (>4 diodes), and with very large piv's or noisey systems with a lot of untamed kickback. Above 50kv, I prefer a Machlett vacuum diode or GE kenetron under oil. Both are effectively obsolete and unobtainable except from old dental x-ray systems, but they could take a lot of abuse that would send a semiconductor diode to that big silicon valley in the sky.

Richard Hull