>
>Hi Peter,
>
>By the way, I pulled the WEB page up and looked at the national
>standards for measuring RF power and like the e-mail said, it rules
>out using a scope.
>
? Call for references. This has the ring of the R+D manager thing. .
>Now it took about 2 weeks and a hundred posts to sort through all
>the allegations and nonsense just to find out what anyone who is
>involved in measurements already knows, no one uses a scope
>except when they can't use anything else.
>
? If P does not vary for a minute or so, the choices are
bomb-calorimeter and calibrated oscilloscope to measure the potential
across the termination R. If P is transitory, eliminate
bomb-calorimeter.
>During FDA measurements here of pulsed medical RF devices, I
>had to use a calibrated Bird 4391 meter.
>
? how is this instrument calibrated?.
>Now let's see if we can sort through the rectifier thing in an equally
>professional manner.
>
>> >After that time, all the diodes will return to their blocking state
>> >and will share the reverse voltage...
>
>It appears Peter and I have the same question. What mechanism
>is it that causes this "shared reverse voltage"? My concern is
>some of the statements made in the Motorola Rectifier and Diode
>Handbook that seem to conflict with the idea the diodes won't
>suffer increased failure if voltage doesn't happen to divide equally.
>
>So maybe someone can explain, hopefully in a nice sane way, why
>the voltage divides equally.
>
? The potential does not necessarily divide equally. It divides
according to the avalanche-voltages.
>
- later, Tom
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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