Hi Paul.

Ken

M0KHW

To: <[email protected]>
Sent: Sunday, November 29, 2009 3:51 PM
Subject: Re: LF: Re: Re: 4kv diode


Ok Ken

and they will probably be fine. After all there are more stories out there
about blown diodes than equalizing resistor flash-overs.

sounds scary for 2.3kV peak.

BR

Paul-Henrik

Quoting Ken <[email protected]>:

Hi Paul.
On my last mailing I got the BY255 current wrong.

Ken

M0KHW

----- Original Message -----
From: "Paul-Henrik" <[email protected]>
To: <[email protected]>
Sent: Sunday, November 29, 2009 2:45 PM
Subject: Re: LF: Re: Re: 4kv diode


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
safely
without a reverse voltage equalizing network.

Make sure you implement a healthy safety marigin, ie. don't use just as many diodes needed to acheive the needed voltage rating. Using 3 amp diodes when

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 <[email protected]>:

> 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: [email protected]
>   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: [email protected]
>       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: [email protected]
>         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
>
>
>