[AMPS] In diodes we trust

[Rich Measures]

>
>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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