[MRCA] ARA Dynamotor Plug Replacement -- Screws Needed

Mark K3MSB mark.k3msb at gmail.com
Wed Jul 16 10:03:32 EDT 2025


Hi Everyone

I needed to replace the dynamotor plug on one of my ARA receivers as the
flower petals on one of the pins was missing.   Dave AB5S sent me a
replacement connector – Thanks Dave!

I proceeded to remove the old connector.

[image: image.png]

The connector from Dave was used, so it took a bit of bending and use of a
Dremel Tool to get it to fit into the hole, but a bit of patience yielded a
connector that slid into the hole with little effort.

[image: image.png]

The question was how to secure it to the chassis.  I had considered some
glues or J B Weld but instead decided on a purely mechanical solution.   I
used some spare 3x56 x ¼  screws and put then into the tops of the threaded
sleeves that are used to secure L-14 under the chassis:

[image: image.png]

This worked nicely, but I soon discovered there was no room in the sleeves
to secure L-14 from the bottom.   It took me several minutes to figure this
out as I was having a devil of a time securing L-14, and that's usually not
an issue.   My apologies to the Lord for some of the words I was
uttering.....

Searching in my hardware stash,  I discovered some longer 3x56 screws,  3/8
inches long..   I used them to secure L-14 from the bottom, and they
protruded above the sleeves (barely enough) to put some nuts on them to
hold the plug in place:

[image: image.png]

This seems to provide a secure mechanical only solution.

The screws I used were 3x56 x 3/8,  but ½ inch or longer would be better.
 With longer screws, I can use a washer to provide better overlap of the
plug.

Might any of you have some that you could send me?    Yes, I'm sure
McMasster-Carr has them, but I just need 2 for now.... 4 would be super!

73 Mark K3MSB
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