Re: reverse recovery time of 6 kV diodes from All-Electronics

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Justin,

On 26 Feb 2002, at 7:51, Tesla list wrote:

> Original poster: "Justin Hays by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<pyrotrons2000-at-yahoo-dot-com>
> 
> Thank you Jim for posting this information. I have wondered about the
> diode's Trr for quite some time now. 
> 
> I know they work great for rectifying the output of a flyback
> transformers, as I have used them to do this at frequencies greater
> than 100kHz. No problem for the diodes.
> 
> This leads me to believe that these actually COULD rectify the output
> of a Tesla coil. I wonder if it would work with spark-gap types, as a
> BUNCH might have to be put in series for the initial voltage pulse
> right after the gap fires.
>  
> It looks especially promising for the solid-state and vacuum-tube
> driven types as the output is very clean.
> 
> Got a question for Jim and All: What does putting the diodes in
> series do to the reverse recovery time (Trr) of the string? I have
> been told by an engineer whom I know, that it doesn't affect it at
> all. Trr remains the same, PIV' are added, and current handling
> capability stays the same.
> 
> Is this true?

It should be since Trr is an intrinsic property of the diodes.

Regards,
malcolm