>
>Hi again,
>
>Was just looking at my components some more on my amp.
>
>The tune C is a Jennings UCS vacuum cap rated at 10KV. From my readings
>on tube amps that I have been doing recently, I remember reading that one
>must accept the fact that the AC voltage across the tune C can end up
>being twice that of the plate voltage.
>
Not if one uses a DC blocking capacitor. When such an amplifier is
tuned correctly the peak anode swing is slightly less than the anode
supply potential. // The RF peak volt rating of a vacuum tuning cap. is
60% of the DC rating.
>I have been wanting to run the 4-1000A at a plate voltage of 6 KV. After
>reading what I have read though, I feel I may have a problem. 6 KV means
>my AC swing could be as high as 12 KV which is above the rating of the
>cap.
hardly
>
>Are these caps conservatively rated? Are the rated for peak voltages or
>RMS voltages?
peak 60Hz volts or DC volts.
>Do I have a problem running a DC plate voltage of 6 KV and
>using this cap or should I lower my voltage to less than 5 KV which is
>something I really don't want to do as I'll lose some gain on the ole
>firebottle?
Provided that the vacuum cap. meets the DC voltage spec. of 10kV on a
high-pot, tester, I would not hesitate to run 6kV.
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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