[AMPS] Re: paralleling power diodes
Sun, 31 Jan 1999 15:00:49 -0500
On Sun, 31 Jan 1999 11:14:26 -0600 "Roy Koeppe" <email@example.com>
>Hi and yes,
>Equalizing resistors are in order. Use a fractional-ohm resistor in
>with each diode to equalize forward resistance. Also, if you have
>choose from, try measuring forward drop under load (a voltmeter across
>one of a test series string with say 0.1 A flowing thru the string).
>pick out matched groups.
With 1N5408 3A 1KV diodes around .20 ea or .39 for the 1200V 1N5409 (
Qty 1-99 at Mouser) why on earth use 500ma antiques?
Just the time involved to play/match with the old ones negates their
value if anyone values his time. To top it off those antiques have
nowhere the surge current ratings of modern devices.
I had similar penny pinching leanings many years ago and finally got the
bright idea to take a lot of that stuff to the dump....no regrets.
73 Carl KM1H
>From: john merryman <firstname.lastname@example.org>
>To: email@example.com <firstname.lastname@example.org>
>Date: Sunday, January 31, 1999 6:57 AM
>Subject: [AMPS] Paralell Diodes for increased current rating
>>I have access to boxes of cheap .5amp diodes, i would like to
>>them for a high voltage 1 amp use. What is the current thinking on
>>this method, and should equalizers be used.
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