Re: Capacitor Help

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: robert heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>

Malcolm: Dr res. suggestion that you start with a scrap wire primary is a
valid point. I hope 25 ft of tubing is long enough. I have had coils that
required only 2 turns , but it is common to nead over 50 ft. That depende on
the size of your capacitor and your resonant frequency. The lower the
frequency the larger the coil and capacitor.
     Robert   H
--


> From: "Tesla list" <tesla@xxxxxxxxxx>
> Date: Tue, 13 Dec 2005 19:02:47 -0700
> To: tesla@xxxxxxxxxx
> Subject: Fw: Capacitor Help
> Resent-From: tesla@xxxxxxxxxx
> Resent-Date: Tue, 13 Dec 2005 19:20:03 -0700 (MST)
>
> Original poster: "MalcolmTesla" <tesla@xxxxxxxxxxxxx>
>
> Opps, made a typo.  I was supposed to say 27 AWG below, not 17.
>
> Thanks
> Malcolm
>
> ----- Original Message -----
> From: "MalcolmTesla" <tesla@xxxxxxxxxxxxx>
> To: "Tesla list" <tesla@xxxxxxxxxx>
> Sent: Tuesday, December 13, 2005 6:17 PM
> Subject: Re: Capacitor Help
>
>
>> I started making my primary.  I'll give a link to a picture below.  It's
>> made from 25 feet of 1/4" ice maker copper tubing.  There are 7 full turns
>> and a little more on the sides.  As you can see in the pic the overall
>> diameter is about 17 ~ 18" depending on where you measure.  Inside
> diameter
>> starts around 6 ~ 7".
>> The wire I've ordered for the secondary is 17 AWG (1.3 lbs on the way).
> My
>> PVC is 4" diameter.
>> When winding my secondary should I pay more attention to counting turns or
>> more attention as to how far up the PVC the windings go?  Someone had
>> mentioned about 18", others have said 1300 to 1500 windings.  Now that you
>> see my primary and have more information what do you guys recommend?
> Thanks
>> :)
>>
>> Oh and this pic is after spending some time bending the tubing, it's not
>> fastened down yet, just loosely laying there so it looks a little sloppy.
> I
>> must say I have great respect for you guys that have such perfect looking
>> primary's.  How on earth do you guys bend them up so neatly?
>>
>> http://www.v8-ranger.com/temp/tesla/7.jpg
>>
>> Thanks
>> Malcolm
>>
>> ----- Original Message -----
>> From: "Tesla list" <tesla@xxxxxxxxxx>
>> To: <tesla@xxxxxxxxxx>
>> Sent: Tuesday, December 13, 2005 2:37 PM
>> Subject: Re: Capacitor Help
>>
>>
>>> Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>
>>>
>>> Hi,
>>>
>>> At 12:27 PM 12/13/2005, you wrote:
>>>> Hey guys,
>>>>
>>>> After much searching and calling around I finally got the 338-1175-nd
>> caps
>>>> from Digi.  I got 14 so I'll have two extra incase of problems.
>>>
>>> Cool!  They should be fine.  It helps some to take stress off the
>>> caps by keeping the secondary frequency low (lots of secondary turns
>>> and big top terminal), but don't worry about it much.
>>>
>>>> Everywhere
>>>> I called only had 10 pound spools of wire and the cheapest I found was
> $9
>> a
>>>> pound for 28 AWG.  I was about to break down and pay the $90 from a
> local
>>>> supplier when I got back in touch with surplussales.com to see if
>> anything
>>>> had changed since my last call to them and sure enough the guy had 1.3
>>>> pounds of 27 AWG for $13.  Woo Hoo!  He's shipping that out to me right
>>>> away.
>>>
>>> Cool!!
>>>
>>>
>>>> Thanks guys.
>>>>
>>>> Oh and I have another quick question :) on the high voltage side I see
>> some
>>>> people wire the capacitor in series with the primary and others put the
>>>> spark gap in series and the capacitor in parrallel with the NST.  Which
>> way
>>>> is correct? or does it even matter?  I was going to put the capacitor
> in
>>>> series with the primary.
>>>
>>> The spark gap should be across the NST parallel with the NST.  When
>>> the gap fires, it tends to put a short across the NST which helps to
>>> protect it greatly.
>>>
>>> Cheers,
>>>
>>> Terry
>>>
>>>
>>>
>>>> Thanks
>>>> Malcolm
>>>
>>>
>>>
>>>
>>
>
>