[Elecraft] Yama CM-500 Replacement

[Mike Harris]

Hi,

I bought a pair of Koss SB-45 when my CM-500 ear cushion covers started 
disintegrating leaving the dreaded black dandruff. My wife fabricated a 
couple of fabric covers and the problem was resolved. Recently I was 
sent a pair of fabric earphone covers by a friend obtained from Amazon 
who for some reason won't ship to the Falklands. They are simple 
elasticated covers and they slip over the ear pieces. A satisfactory 
extension to the life of the CM-500.

Returning to the Koss  SB-45. I substituted them for the CM-500 and a 
local could hardly detect any difference. The mic boom is a bit more 
springy and take a bit more effort to tailor to the individual 
preference. The cord is much lighter than the CM-500 which could be a 
weak point. Mine have been in the draw for a couple of years unused 
because the CM-500 are refusing to die.

Regards,

Mike VP8NO



On 09/01/2019 02:51, Walter Underwood wrote:
> I’ve heard good things about the Koss SB-45. It has an electret mic and is about half the cost of the CM-500, at $25. I have not used the SB-45.
> 
> https://www.amazon.com/Koss-sb45-SB-45-Communication-Stereophones/dp/B00081A2CW
> 
> I would not get the Koss SB-40. That looks like the Yamaha, but has a dynamic mic that has gotten some bad reports.
> 
> A while back, I took a close look at the mic plug on my Yamaha CM-500 headset. It is labeled “Koss”.
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)