Regarding the 2nd point - yes, you can easily put zeners in series. But the
wattages do not need to be the same necessarily - since they are in series, the
same current will flow in each one and the power dissipated will be:
Current through the string * voltage of each zener
You can start by calculating the maximum current through the existing zener for
the power rating (or be conservative and use 1/2 (or less) of the rated power)
and then use that current to calculate the power dissipation in the 'new'
choices.
73
Bob, WA2CKY
----- Original Message ----
From: Bob Maser <bmaser@tampabay.rr.com>
To: AMPS <amps@contesting.com>
Sent: Sunday, September 7, 2008 3:34:58 PM
Subject: [Amps] Zener Diode Needed
I need a 5W 56V zener for my Tetrode board. It is a 1N5370B. Anyone have
one that they are not using?
Also, I believe that zeners can be placed in series to achieve higher
voltage. Are there caveats to doing this as long as the zeners are the same
wattage.
Bob W6TR
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