[Heathkit] SB-610 Selenium Diodes - caps across silicon diodes.

[Mike,W8KRR]

Still say "better safe than -"
Mike

Garey Barrell wrote:

> Pre 80's (roughly) diodes were not as consistent from unit to unit as 
> they are today.  Parallel resistors and capacitors were used in an 
> attempt to "force" equal distribution of static and dynamic voltages 
> across series connected devices even though one might have 
> considerably lower reverse current leakage, etc.
>
> Improvements in manufacturing techniques and materials have resulted 
> in devices that are near clones of each other and so have very closely 
> matched forward and reverse characteristics.
>
> 73, Garey - K4OAH
> Atlanta
>
> Drake C-Line Service Manual
> <http://www.k4oah.com>
>
>
> Tom NØJMY - AAR7FV wrote:
>
>> ----- Original Message ----- From: "Garey Barrell" 
>> <k4oah at mindspring.com>
>>
>>> None of my design references for power supplies recommends bypassing 
>>> of individual diodes
>>
>>
>>
>> <snip>
>>
>> I remember it was the recommended practice in the ARRL handbook at 
>> least until the mid-80's.  Things have changed since then, of course, 
>> and I haven't checked any of the more recent editions. I would be 
>> interested to see when and if (and, of course,  if so, then *why*) 
>> they dropped this recommendation.
>>
>> 73,
>> Tom
>>
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