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

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <A123X-at-aol-dot-com>

I don't know a lot about diodes except the whole rectification, max current,
and peak reverse voltage. Anyway, I am using these diodes to rectify the output
of a flyback(powered by 12v) to power a small TC. It does work pretty
well(spark output a little under 3"), but the thing is that the flyback itself
produces much shorter sparks when its rectified with the diodes. This causes
the spark gap to be hard to set good. Is there a reason the rectification does
this? 

Mark 

In a message dated 2/25/02 7:01:13 PM Eastern Standard Time, tesla-at-pupman-dot-com
writes: 


>
> For those of you interested in HV DC supplies, etc... 
>
> Vivek and I just measured (approximately) the reverse recovery time of the 
> 6kV, 200 mA diodes from All Electronics (http://www.allcorp-dot-com/) (part 
> number R6000, page 80 of catalog 701, $0.50 each, 100 for $40.00). 
>
> A lash up test rig with a 1 MHz square wave source at 4.5 Volts into a 50 
> ohm scope input shows the reverse recovery time is around 110-120 nSec. 
> Not blindingly fast, but certainly fast enough for line frequency 
> applications, and potentially fast enough for rectification at TC 
> frequencies (say, you wanted to build a AC/DC converter in the secondary to 
> measure voltages or currents). 
>
> No idea on the other diode parameters.. 
>
>