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Re: Help w/ Chokes
On Thu, 30 May 1996 07:14:11 -0600, Tesla List
<tesla-at-poodle.pupman-dot-com>, you wrote:
>>From JParisse-at-DDLabs-dot-comThu May 30 07:13:04 1996
>
>O.K.... Is there a handy formula to help me wind the chokes to arrive at the
>240-320mH range? I've just wound wire on a tube in the past and would like to
>take a more educated approach this time. Thanks... ...Jeff
>
a^2 N^2
L = ------------------------------- microhenries
9a + 10l + 8.4c + 3.2(cl/a)
where:
a is the avarage radius of the multi-turn coil
l is the width of the coil
c is the hight of the winding
N is the number of turns
l
____ ------------
| |_____
c | |
____ ------------ a
| |
| |_____
| |
| |
------------
| |
| |
------------
Jeff,
I can't see enough of your transformer in the pics to tell if
it is shunt limited or not. Look for core material between the primary
and secondary windings. That makes the core a figure 8 rather than an
0 (both numbers square)
Regards,
jim