Here is what I posted almost a year ago ...
So far both rebuilt sets are holding up as expected. I have
not had occasion to check if the links given are still valid
- particularly since I picked up enough spares to rebuild both
sets a second time <G>.
I would not recommend the "goop" method as using the correct
cushions the way they were designed is quick, easy and neat.
-------- Forwarded Message --------
Subject: Re: [Elecraft] CM 500 Ear Covers - Update
Date: Sun, 21 May 2023 12:23:30 -0400
From: Joe Subich, W4TV <li...@subich.com>
To: elecraft@mailman.qth.net
A follow-up ...
Since I had two pairs of CM-500 that needed refurbishment
(my original pair - without any cushions - and my current
pair - that is starting to flake), I took a chance and
ordered cushions for the Koss QZPRO.
<https://koss.com/products/qzpro-ear-cushion>
They arrived a couple weeks ago and appear to be a perfect
fit for the CM-500. I would guess they are the same as the
suggested UR-20 cushions (which are "Sold Out").
As the foam was also gone (original pair) or falling apart
(current pair), I started looking for a suitable replacement
as I did not want to do a cut up sock and double stick tape
as suggested in one You Tube video. I found these:
<https://www.amazon.com/dp/B07WN8SWHR>
These are 90 mm round and I was able to simply tuck them
between the QZPRO cushions and the face of the CM-500
"speakers" after installing the new cushions. There was
no need to cut them down to fit the recesses of the CM-500
and hold them in place using double stick tape. The foam
is a bit thicker and softer than the original Yamaha (Koss).
Finally, and probably not necessary, I added cloth covers ...
<https://www.amazon.com/dp/B09B7JCY8H>
Although I took a chance and got a spare set of the cushions and
foam disks for each of my CM-500s, I decided the extra protection
from sweat, etc. was probably worthwhile for the long term. I
went with black but a station with multiple operators could use
a different color for each operator.
All in all, replacing the cushions and adding new foam is quite
easy - no broken speaker wires if one is careful. Getting to
the three screws (Phillips #0) is easy once one learns where
they are (front and +/- 120 degrees). For $18 total per headset
for cushions ($5), foam disks ($9) and covers ($8 for 2 pair)
the cost is far less than an equivalent replacement headset
(the CM-500 is currently $60 on Amazon).
73,
... Joe, W4TV
On 2/14/2024 3:32 PM, Jim Leder wrote:
I have two Yamaha CM500 headsets that I really like. However, both are
suffering from the ear pad deterioration problem. A long time back I saw
several postings suggesting replacement ear pads AND the foam inside cover.
Naturally now I can't find them. I would like to rebuild at least one of them
via the 'goop' (glue) method. Any recommendations for both the ear pad AND the
foam inside cover?
Thanks,
Jim Leder ... K8CXM
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