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Sci.Electronics.Basics -> How does this circuit work? Is it a pre-amp?
There are 21 messages in this thread.
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Author: Jasen BettsDate: 07:54 05-07-07
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On 2007-07-03, MRW <mr.whatever@gmail.com> wrote:
>
> The paper also says: "L2 is 112nH (this tunes to the middle of the FM
> band, 98 MHz), with C13 at its center value 33pF. L2 is 5 turns of 22
> swg enameled copper wire close-wound on a 5mm diameter former. You can
> also have a fixed 33pF capacitor instead of the variable C13 and have
> L2 as an adjustable molded coil."
>
> ... btw, what's a "former"?
something to wrap the wires round.
A 5mm drill bit would work (and willbe exactly 5mm) 22swg is stiff enough
to hold its shape after the bit is withdrawn. (leaving the drill bit
in place would foul everything up)
--
Bye.
Jasen
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