Hi,
I need a 33V 1W zener diode to repair a Samsung TV GX1395 (in tuner 33V line). I have a bunch of 33V 1/2 W NTE5036A zeners. Is there anything wrong with putting two 1/2W zeners in parallel?
I also have a 24V 1W and a 9V 1W. I thought about putting those in series.
Thanks in advance, Brad
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Two zeners in parallel doesn't really work, since there is no way to guarantee they will share current equally, or even share current at all. More likely one diode will "zener" first, then effectively bypass the other.
Zeners in series, however, works fine in my experience.
Mark Z.
The one with the slightly lower voltage will dissipate most of the power.
That's better.
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On Thu, 31 Mar 2005 12:30:14 GMT, snipped-for-privacy@verizon.net (Brad) put finger to keyboard and composed:
Many TV tuning circuits require temperature compensated reference zener diodes, eg TAA550B, uPC574J. I'm not sure if a regular zener is stable enough for these sets, even after allowing for AFT.
- Franc Zabkar
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