>I saw the "jig" that is used to roll the coil in the Nye Viking MB V A, at
>the factory in north Idaho. Hard to explain, but really works neat!! Just
>some wheels and rollers.....hooked to a lathe at very slow speed.....
>BTW Rich and Carl, What do you think of the idea that Henry uses for there
>tanks in some of there amps. ??
? If C-tune is the right value, variable L works well.
>Having a fixed value of C tune, and a roller coil for the "plate tuning"
>..It uses a Pi-L and a standard loading cap. There is no C tune used on 10
>and 15 meters. Just the tube and stray capacitance. The amps put out a good
>1500 watts on 10 and 15 meters both......(2kd5)....They use "door knobs" for
>the tune caps. Using a neat switching arrangement for selecting them......
>Besides the high filament voltage and the low value of R across the
>electrolytic caps, the amp works great....
>What is the current through the door knob caps ?
? It is basically I=E/ohms of reactance. E is approx 90% of the
supply potential x 0.707.
- later, Jim
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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