** A DO-5 case 3A rectifier dissipates c. 2.2W at 3A. Since rectifier
junctions typically have higher allowable junction temps than zener
junctions, running a DO-5 case zener at 4.5w is bananas.
>> You should have enough headroom. That's only .8^2 * 5.6= 3.6 watts per
>> diode. Maybe the heatsink is too small, or mounting is incorrect.
>
>Woops. Shouldn't be a square in there. .8 times 5.6 at about 4.5W is
>correct. 73, Tom W8JI
>W8JI@contesting.com
>
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>
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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