[Prev][Next][Index][Thread]
Small tesla coil (1sq ft) findings
----------
From: Bill Noble [SMTP:william_b_noble-at-email.msn-dot-com]
Sent: Tuesday, June 23, 1998 2:01 AM
To: Tesla List
Subject: Re: Small tesla coil (1sq ft) findings
according to my everready battery handbook the following are recommended
currents.:
AAA cell - 20 ma
AA cell 25 ma
C 80 ma
D 150 ma
G 300 ma
LeClanche' (#711) 500 ma
LeClanche' (#742) 100 ma
"6" 1.5 amp (this is like an airplane glow plug battery)
LeClanche' (#222) 8 ma (this is a typical 9V battery)
So, an aa cell will give you 1.5X.02=.03 watts, AA .0375 watts, C .12 watts,
D .225 watts, G .45 watts, and a "6" 3 watts. A 9v 222 will give you .072
watts. These are short duration contiuous power - good for a few hourss but
not days. Short circuit current is higher - for example:
AAA 1 amp, or 2 hrs per day at 100 ma, with a 0.8V cutoff will give a life
of 1.8 days, or 60 minutes at 375 ma (e.g. about half a watt)
222 is good for 16 ma for 2 hrs per day with a 4.8 v cutoff voltage with a
life of 44 days
>
>----------
>From: Jeff Corr [SMTP:corr-at-enid-dot-com]
>Sent: Monday, June 22, 1998 1:13 AM
>To: Tesla List
>Subject: Re: Small tesla coil (1sq ft) findings
>
>Just for a small assumption... how many watts is a battery capable of
>supplying... say a 9 volt battery. Perhaps 4 double "A" batteries...
>I'm just wondering on the ability to produce a coil from a few small
>batteries and a flyback transformer. Anyone ever tried this? A small
>handheld coil would be neat.
>
>>Hi Jeff,
>>
>>> From: Jeff Corr [SMTP:corr-at-enid-dot-com]
>>> Sent: Friday, June 19, 1998 12:25 AM
>>> To: Tesla List
>>> Subject: Re: Small tesla coil (1sq ft) findings
>>>
>>> >This post makes me think it could be time to resurrect Robert
>>> >Stephen's suggestion of a competition for small coils. I would
>>> >definitely be a starter in the bang for buck stakes. Whatthinks?
>>>
>>> Sounds interesting. By "small coils" do you mean the primary and
>>> secondary or the entire setup... with chokes, without, what?
>>
>>I guess I really mean lower power. One can't run 100W say into a 10"
>>coil and expect any output because the voltage developed would be too
>>low. Therefore one would want to use a small resonator with low
>>capacitance. I'd just be interested to see what is possible with say,
>>a primary energy fixed at some level and BPS unlimited. I think a lot
>>could be learned from such an exercise. I recently got better than
>>12" from a 5kV 30mA transformer. I didn't scope the BPS but it would
>>have been around 100, certainly not more. Perhaps it's something I
>>should pursue.
>>
>>Malcolm
>>
>>
>
>
>