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Re: [Amps] series-connecting a split-stator variable cap

To: amps@contesting.com
Subject: Re: [Amps] series-connecting a split-stator variable cap
From: "Will Matney" <craxd1@verizon.net>
Reply-to: craxd1@verizon.net
Date: Mon, 20 Mar 2006 03:03:03 -0500
List-post: <mailto:amps@contesting.com>
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've been up way too long. The doc has me on 
a new medicine to help stave off some nerve pain I have behing my right eye, 
and it's keeping me awake and can't sleep even though I want to. Been like this 
now for four nights and it's getting to my thinking. Go see him in a couple of 
days and I'll get something done :)

Best,

Will

*********** REPLY SEPARATOR  ***********

On 3/20/06 at 9:24 AM Val wrote:

>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 LZ1VB
>
>> 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 of increasing the voltage
>unless the plates are spaced >further apart. If you series the sections by
>using a jumper across the screws, you increase the capacitance, not cut it
>in half. >You have to paralell them to do that and there's no way to do it.
>To get less capacitance, or cut it in half plus raise the >voltage, remove
>half the plates at every other plate. That will increase the air gap and
>the
>voltage rating, plus cut the >capacitance of the section in half. Those
>plates will come off as they're just pressed on.
>
>
>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.
>> *********** REPLY SEPARATOR  ***********
>>
>> On 3/19/06 at 4:19 PM Scott Townley wrote:
>>
>> >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
>> >float the rotor?  Obviously the rotor must be isolated from the chassis
>> >now, and I won't get 20/2=10pF min due to frame effects, but I only need
>> >15...anything I'm missing?
>> >TIA,
>> >
>> >
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>>
>>
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