Re: HV DIODE VARO H180 vs. H1812

peter jones wrote:

>-----Original Message-----
>From: Rodger Boots <rlboots@cedar-rapids.net>
>To: vectorlist@vectorlist.org
>Date: Thu, 11 Mar 2004 13:47:49 -0600
>Subject: Re: VECTOR: HV DIODE VARO H180 vs. H1812
>
>
>
>>Although microwave diodes can certainly take the voltage, I wonder if
>>they are fast enough. Probably not, would put additional loading on the
>>flyback.
>>
>>
>>
>>
>forgeting microwave diodes for a second,
>is puting 2 diodes in series to double the voltage safe?
>i have a scope that i cant get the diode for, but getting diodes with a lower voltage is easy.
>it may double the voltage handling, but does it effect the leakage,voltdrop,speed etch.
>

It is done, but usually you'll want to put a resistor across each diode
to help balance the voltage to each diode. The value should be selected
depending on the application, but a megohm or so should work. But be
careful that the resistor can handle the voltage (for example, many half
watt resistors are only good for 250 volts or so, don't just rely on
power dissipation. The purpose here isn't to dump power.).

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Received on Fri Mar 12 15:20:30 2004