The problem with a 50w zener is that its Vz is not adjustable. A
fwd-biased Si diode string can be adjusted by changing taps.
>
>
>> How about the old trick of putting a power resistor in parallel with the
>> zener to take some of the "heat."
>>
>> WA5JCI
>>
>> //I wouldn't do that; it makes for a pretty sloppy regulator, having no
>> real "knee." I don't understand why hams resist simply using components
>> designed for the task at hand -- am I missing something? I can buy DO-5
>> case, 50W, 100Apk Iz rated, 5% tolerance zeners all day long for less than
>> the cost of a six-pack of 807's. And just one will do the job, and likely
>> outlast the operator.
>>
>> -WB2WIK/6
>> ...
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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