Subject: GLOWBUGS digest 277

From: [email-masked]
Date: Fri, 30 Aug 1996 22:39:04 -0500 (CDT)

GLOWBUGS Digest 277

Topics covered in this issue include:

  1) Mystery Coil
	by [email-masked]

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Date: Fri, 30 Aug 1996 21:58:31 -0400
From: [email-masked]
To: [email-masked]
Subject: Mystery Coil
Message-ID: <[email-masked]>

I recently bought a box of assorted radio parts and got a very interesting
coil in the bargin.  The coil is about 3 inches in diameter, 5 inches long
and is wound with cotton covered stranded wire of about 20 guage.  About 2/3
up the coil there is a shaft that turns a smaller coil inside.  Half of the
windings on the roating coil overlap the lower 2/3rds of the larger coil and
the other half of the roating coil overlaps the upper 1/3rd of the larger
coil.  I was wondering if anyone could tell me what this coil was intended to
do?  I have seen rotating coils used to control feedback in regen receivers
and to adjust antenna coupling but, this one is a mystery to me.

73,

Eric, WD6DGX

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End of GLOWBUGS Digest 277
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