[Amps] Amps Digest, Vol 241, Issue 1

[N4IJ]

Got it figured out. Had to disassemble it to see what is going on.
Solid tube in the ceramic coil form.  Two smaller short shafts that
fit inside the internal tube.  One side has a 1/4" rod pressed on, and that
is the end that moves the coil.   Most of you already knew this - so never
mind.

Doug N4IJ

On Tue, Jan 3, 2023 at 12:00 PM <amps-request at contesting.com> wrote:

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> Today's Topics:
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>    1. Roller inductor construction (N4IJ)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Mon, 2 Jan 2023 20:33:46 -0500
> From: N4IJ <dougn4ij at gmail.com>
> To: amps at contesting.com
> Subject: [Amps] Roller inductor construction
> Message-ID:
>         <CA+Ht2hPsCm_AL_7ESYvxjdGpCY=DT=
> 1v_p5-82phTf4x1v8qeg at mail.gmail.com>
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>
> I have an old Multronics roller inductor (229-203-001) That acts strangely
> best I can tell. I have to admit I have been a ham for a long time but
> never pais much attention to the construction of these,
>
> Is the coil shaft solid?  On this one, it looks like there should be spring
> spacers on
> each end of the coil shaft, but one is missing?  The ceramic form can shift
> along the shaft.   I do have the smaller 19uh version (229-201.11) that I
> can see two
> springs - one on each side of the shaft.  If I turn one end of the shaft,
> the coil turns
> but the other end of the shaft does not turn the coil.   But is
> electrically shorted.
>
> Puzzling.
>
> Doug N4IJ
>
>
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> End of Amps Digest, Vol 241, Issue 1
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