[Boatanchors] How to bush a knob for a 1/8" shaft

[Glenn Little WB4UIV]

Use hobby brass tubing available at craft or hardware stores.
You will probably need at least two different sizes to get the proper 
bushing.

73
Glenn
WB4UIV


On 3/28/2026 11:59 AM, Doug Hensley via Boatanchors wrote:
> I purchased a Millen grid dip meter (Model 90651A) over the internet only to have it damaged in shipping.  One issue is the two front knobs were broken.  As my luck would have it, while the left knob fits a standard 1/4" shaft, the right meter adjust knob is a 1/8" shaft.  Guess what the odds are of finding a matching pair like that anywhere?
>
> So, if I could find a way to bush a 1/4" knob bore down to 1/8" and use a longer set screw, that's my first idea.
>
> Has anyone solved this problem before and have you any suggestions?
>
>
> Doug W5JV
>
>
>
>
>
>
> Visithttps://www.qrz.com/db/W5JV  for some great vacuum tube finds.
>
>
> ______________________________________________________________
> Boatanchors mailing list
> Home:http://mailman.qth.net/mailman/listinfo/boatanchors
> Help:http://mailman.qth.net/mmfaq.htm
> Post:mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Gary Harmon, K5JWK
> ** For Assistance:gharmon at idworld.net  **
>
>
> This list hosted by:http://www.qsl.net
> Please help support this email list:http://www.qsl.net/donate.html
> Message delivered toglennmaillist at bellsouth.net  

-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIVwb4uiv at arrl.net     AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"