I have a dual (split-stator) 20-100pF air cap, 0.040" gap (so ~1500V) I need a single 15-50pF, 3000V for a tank tuning cap. So is there any reason I can't simply series-connect the split stators and
ORIGINAL MESSAGE: ** REPLY SEPARATOR ** It's done often. Should be no problem. Bill, W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contestin
Scott, The capacitors rotor has to go to ground, and the stator to the tank coil to work. Generally, the rotor is connected through frame ground via a wiper. The stator is insulated. There's no way o
I messed up here. Adding two series sections cuts the capacitance in half, and paralleling them increases it. Why I got turned around I don't know. Anyhow, jumping the screws over adds capacitance so
Will, The sections will be put in series by the common rotor. Each of the 2 stators ends will be capacititor's end. The rotor and the frame will be insulated and will work OK. Have done that. 73, Val
Val, How is it possible to change the voltage rating unless the air gap spacing is farther apart? I can't see how you can make a series circuit if the rotors are on a common aluminum shaft unless the
Ok, I see where your coming from. Hook the first stator to the tank coil. Then hook the rear staor to ground. That forms up the two caps in series and you insulate the shaft and the frame. I swear, I
I would also make sure the rotor shaft is WELL isolated from the front frame (and your hand!) by using some kind of long non-conducting shaft extention. You don't want the value of the circuit changi
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Mon, 20 Mar 2006 13:55:05 +0100 (CET)
Besides either an insulated shaft or a good low capacity shaft coupler and a grounded metal shaft, if the capcitor is directly across the HV, something like 10 Megohm from rotor to ground. Otherwise,
Peter suggests "something like 10 Megohm from rotor to ground" There is another advantage to that. Without the resistor to ground, there could be a voltage between the rotor and grounded stator. It w
Oren Elliot makes a line of their caps with a nylon shaft entension. They have this on all there caps, large or small. Best, Will ** REPLY SEPARATOR ** _______________________________________________
One advantage of this is that there will be no current flow through the wipers connecting the rotor to the frame. I presume that, especially if it's an old capacitor and the wipers aren't in top cond