[AMPS] Another doorknob question:

[Rich Measures]

>
>I have a capacitor marked only 'Sprague 1000MMFD6KVDC'.  It's about 1" 
>(2.5cm)
>diameter and 5/8" (1.56cm) thick.  Is this a 'TV doorknob'?  

€  no

>I had planned to
>use it for a blocking capacitor for my 1500-watt output (3KV on plate) amp 
>Comments?

€  it should fly ok at 1500w.  .  
>
>I also have some Centralab type 850s 5KV doorknob capacitors that I was
>intending to use for padding the tune and load C on 160 and 80 meters.  Are
>these appropriate?

€  For a tuned circuit, one needs 750ppm/degree Celcius  temp. 
coefficient or better.   In >100pF units the dielectric is usually not 
temperature stable.  Y5P dielectric is far from stable.  
-  later, Vic


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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