Hey, I didn't ax the question. K6XK
-----Original Message-----
From: km1h@juno.com <km1h@juno.com>
To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
Date: Sunday, January 31, 1999 4:57 PM
Subject: Re: [AMPS] Re: paralleling power diodes
>
>
>
>On Sun, 31 Jan 1999 11:14:26 -0600 "Roy Koeppe" <royanjoy@ncn.net>
>writes:
>>
>>Hi and yes,
>>
>>Equalizing resistors are in order. Use a fractional-ohm resistor in
>>series
>>with each diode to equalize forward resistance. Also, if you have
>>plenty to
>>choose from, try measuring forward drop under load (a voltmeter across
>>each
>>one of a test series string with say 0.1 A flowing thru the string).
>>Then
>>pick out matched groups.
>>
>>73, K6XK
>
>
>>
>
>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
>
>
>
>
>
>>-----Original Message-----
>>From: john merryman <andy_m_99@yahoo.com>
>>To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
>>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
>>parallel
>>>them for a high voltage 1 amp use. What is the current thinking on
>>>this method, and should equalizers be used.
>>>
>>>Thanks
>>>
>>>
>>>
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>>
>>
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>
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