[Boatanchors] BC-348 tuning shaft and worm

[howard holden]

Hi Dave, I own a BC-348Q which was my Dad's first electronic project, and was my original Novice receiver, along with a Heath AT-1. Don't know about the dial mounting, other than it's probably .375 diameter as most dial shafts areI. Never had a reason to check! I would think that shaft should be fairly easy to straighten as long as you have a dial indicator of some kind.

73, Howie WB2AWQ Reno NV


________________________________
From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of Dave and Sharon Maples via Boatanchors <boatanchors at mailman.qth.net>
Sent: Monday, January 19, 2026 6:48 AM
To: boatanchors at mailman.qth.net <boatanchors at mailman.qth.net>
Subject: [Boatanchors] BC-348 tuning shaft and worm

All: I have acquired a BC-348 receiver.  Apparently the tuning shaft is not
quite straight and the knob binds pretty hard for part of the rotation.

1. How is the worm secured to the shaft?  Is it pinned or are there
setscrews?  This one has been pinned and there's an empty setscrew hole.

2. Does anyone know what the diameter of this shaft is? I am thinking that
replacing it may be easier than fiddling with it if it can be done easily.

3. Does someone have a scrap parts unit laying around that has a good
working tuning mechanism?

Please feel free to forward.

Thanks,
Dave WB4FUR
dsmaples at comcast.net

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