Message-ID: <1259505915.4b1288fb018a7@imp.netikka.net>
Date: Sun, 29 Nov 2009 16:45:15 +0200
From: Paul-Henrik <phl@netikka.fi>
To: rsgb_lf_group@blacksheep.org
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BY255 should be a suitable building block rated 1300V PIV 3A.

Use equalizing resistors in parallell with each diode, typical values used=
 are
470...820kohm. Only controlled avalanche diodes can be series connected sa=
fely
without a reverse voltage equalizing network.

Make sure you implement a healthy safety marigin, ie. don't use just as ma=
ny
diodes needed to acheive the needed voltage rating. Using 3 amp diodes whe=
n 1
amp is called for is no luxury either. You don't want to hear the sound of=
 an
angry rattlesnake from your thunderbox... this sound is often followed by
popping and oozing electrolytic capacitors.


Good luck and please don't get zapped

Paul-Henrik

Quoting mal hamilton <g3kevmal@talktalk.net>:

> Yes series for more V  parallel for more I(amps) and preferable some R=
 and C
> across each except they are really identical.
> mal/g3kev
>
>   ----- Original Message -----
>   From: David Towers
>   To: rsgb_lf_group@blacksheep.org
>   Sent: Sunday, November 29, 2009 12:37 PM
>   Subject: Re: LF: Re: Re: 4kv diode
>
>
>   Hi Mal
>   surely "in series" to give a 4 KV diode at 1amp ?
>   dave G8SZX
>
>
>
>   mal hamilton wrote:
>     Ken
>     On the serious side, use 6 x 1Kvolt @ 1A in parallel if u are stuck.
>     Don't get zapped
>     73 mal/g3kev
>
>       ----- Original Message -----
>       From: mal hamilton
>       To: rsgb_lf_group@blacksheep.org
>       Sent: Sunday, November 29, 2009 11:28 AM
>       Subject: LF: Re: 4kv diode
>
>
>       Electric Chair Co
>       Zapenda Cul de sac
>       Hellda State
>       Zip73
>
>         ----- Original Message -----
>         From: Ken
>         To: rsgb_lf_group@blacksheep.org
>         Sent: Sunday, November 29, 2009 11:04 AM
>         Subject: LF: 4kv diode
>
>
>         Hello All.
>         I am looking for a BY4 or BY6 or equivalent diode, BY4   4kv @=
 1A,
> BY6  6kv @ 1A, I have searched the web and looked in Farnell, any ideas
> please.
>
>         73.
>         Ken
>
>         M0KHW
>
>
>