Re: [Elecraft] Yamaha Headphones

[David Gilbert]

According to many of the reviews of the SB40 I've read on various forums 
(B&H, Amazon, and even this reflector), apparently you can go wrong.


73,
Dave   AB7E



On 12/1/2022 10:36 PM, Todd KH2TJ wrote:

AT $27 with free  shipping, can't go wrongI've been using an older SB49 for 
a few years now without any trubs.

https://www.bhphotovideo.com/c/product/1066286-REG/koss_184755_full_size_headphones_noise_cancelling.html/overview

Later,

Todd KH2TJ


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Re: [Elecraft] Yamaha Headphones

[Ed W0YK]

$26 on Amazon, but the SB45 for $30 may be better for our use.73,Ed W0YK
 Original message From: Todd KH2TJ  Date: 
12/1/22  21:38  (GMT-08:00) To: Walter Underwood , 
Elecraft@mailman.qth.net Subject: Re: [Elecraft] Yamaha Headphones AT $27 with 
free  shipping, can't go wrongI've been using an older SB49 for a few years 
now without any 
trubs.https://www.bhphotovideo.com/c/product/1066286-REG/koss_184755_full_size_headphones_noise_cancelling.html/overviewLater,Todd
 KH2TJFrom: elecraft-boun...@mailman.qth.net 
 on behalf of Walter Underwood 
Sent: Monday, November 21, 2022 11:42 AMTo: 
Elecraft@mailman.qth.net Subject: Re: [Elecraft] 
Yamaha HeadphonesOn Nov 18, 2022, at 6:24 AM, Mike Smith VE9AA 
 wrote:>> Recently I bought a few sets of the Koss SB40 and 
by gosh they look an awful> lot like the Yamaha's..maybe made in the same 
factory - who knows.  They are> starting to get hard to find as well but I 
found mine on amazon.ca for> around $60 CDNThe Koss SB40 appears to be the same 
headset as the Yamaha CM500, but with a dynamic mic. My first CM500 headset 
actually said “KOSS” on the microphone plug, so yes, they are probably made in 
the same factory.An electret mic has much better fidelity than an inexpensive 
dynamic mic, so the CM500 is probably a better choice.wunderK6WRUWalter 
UnderwoodCM87wjhttp://observer.wunderwood.org/ (my 
blog)__Elecraft 
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Re: [Elecraft] Yamaha Headphones

[Todd KH2TJ]

AT $27 with free  shipping, can't go wrongI've been using an older SB49 for 
a few years now without any trubs.

https://www.bhphotovideo.com/c/product/1066286-REG/koss_184755_full_size_headphones_noise_cancelling.html/overview

Later,

Todd KH2TJ

From: elecraft-boun...@mailman.qth.net  on 
behalf of Walter Underwood 
Sent: Monday, November 21, 2022 11:42 AM
To: Elecraft@mailman.qth.net 
Subject: Re: [Elecraft] Yamaha Headphones

On Nov 18, 2022, at 6:24 AM, Mike Smith VE9AA  wrote:
>
> Recently I bought a few sets of the Koss SB40 and by gosh they look an awful
> lot like the Yamaha's..maybe made in the same factory - who knows.  They are
> starting to get hard to find as well but I found mine on amazon.ca for
> around $60 CDN

The Koss SB40 appears to be the same headset as the Yamaha CM500, but with a 
dynamic mic. My first CM500 headset actually said “KOSS” on the microphone 
plug, so yes, they are probably made in the same factory.

An electret mic has much better fidelity than an inexpensive dynamic mic, so 
the CM500 is probably a better choice.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

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Re: [Elecraft] Yamaha Headphones

I tried the Logitech G335 headset for SSB Sweepstakes this year with my K3s.
They are affordable at $39.99 and seemed to work as well or better than my
(now broken) Yamaha Headset.  The receive audio seemed at least as good & a
friend said the microphone sounded fine.  The earmuffs are fabric rather
than plastic (we'll see how that wears), there is no windscreen for the
microphone (but that didn't seem to matter).  My only complaint is that they
have a volume dial that seems unnecessary.  I taped mine to keep it from
being inadvertently bumped (after a misguided "my radio is broken!" panic).
I operated for 22-hours & found it to be a good purchase for me - and the
price was right.

 

73,

Rob - AE7AP

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Re: [Elecraft] Yamaha Headphones

[Josh Fiden]

I see on amazon they list both versions, SB45 and SB45-USB. They’re selling the 
non-USB version for $30.73. Just ordered to try them, that’s really inexpensive!

73
Josh W6XU

Sent from my iPad

> 
> 
> USB plugs on the ends of them, not the 1/8” phono type for Mic and Ear 
> (stereo).

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Re: [Elecraft] Yamaha Headphones

[john]

Koss makes a SB45 headset and a SB45 USB headset. If it does not have USB
listed it should have the 3.5mm connectors that you wanted.

John KK9A
 


Mike Smith VE9AA wrote:

While that may be true Jim, the Koss SB45's I saw on Amazon.ca (ca=Canada)
had USB plugs on the ends of them, not the 1/8" phono type for Mic and Ear
(stereo).

 

I looked at many ads, and there was enough inconsistencies in the ads (some
ads showed USB & 1/8" pictures, both) that I did not buy that particular
model.

 

I was headed to the Caymans for a contest expedition and time was of the
essence, so I erred on the side of safety as there would not be enough time
to buy the proper one later, should I have rec'd the USB ones (that were no
good to me)

 

Mike VE9AA (ZF2AA in CQWW SSB 2022)

 

 

Mike, Coreen & Corey

Keswick Ridge, NB

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Re: [Elecraft] Yamaha Headphones

[Jim Brown]

On 11/21/2022 4:07 PM, John Marvin wrote:
Proximity effect has nothing to do with the technology of the 
transducer, i.e. dynamic, condenser, electret, ribbon, etc.


Yes. In lay terms, it's a property of directional microphones with a 
single rear opening. EV is well known for their Variable-D cardioid 
mics, like the RE10-11-15-16-18-20-27 mics, which have multiple rear 
openings spaced along the "barrel" of the mic. Proximity effect (bass 
boost when very close to the sound source) is greatly reduced by this 
construction. Their first mic of this type was the 666, known as the 
"Buchannon Hammer," because EV was based in Buchannon, MI, and one of 
the company's owners demonstrated its ruggedness by driving nails with 
it. :)  For a few years, AKG and Shure both made a few variable-D mics, 
but they're long discontinued. I still own one, the AKG D224, which is a 
very nice mic.


73, Jim K9YC


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Re: [Elecraft] Yamaha Headphones

[Mike Smith VE9AA]

That’s an American website.

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

From: Jorge Diez - CX6VM [mailto:cx6vm.jo...@gmail.com] 
Sent: November 21, 2022 9:17 PM
To: Mike Smith VE9AA
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Yamaha Headphones

 

hello Mike

 

you have both, SB45 and SB45-USB on this link 
https://www.amazon.com/-/es/Koss-Estere%C3%B3fonos-de-comunicaci%C3%B3n-SB-45/dp/B00081A2CW

 

And really a good price, $30

 

73,

Jorge

CX6VM/CW5W

 

El lun, 21 nov 2022 a las 21:49, Mike Smith VE9AA () 
escribió:

While that may be true Jim, the Koss SB45’s I saw on Amazon.ca (ca=Canada) had 
USB plugs on the ends of them, not the 1/8” phono type for Mic and Ear (stereo).



I looked at many ads, and there was enough inconsistencies in the ads (some ads 
showed USB & 1/8” pictures, both) that I did not buy that particular model.



I was headed to the Caymans for a contest expedition and time was of the 
essence, so I erred on the side of safety as there would not be enough time to 
buy the proper one later, should I have rec’d the USB ones (that were no good 
to me)



Mike VE9AA (ZF2AA in CQWW SSB 2022)





Mike, Coreen & Corey

Keswick Ridge, NB



From: Jim Rhodes [mailto:jimk...@gmail.com] 
Sent: November 21, 2022 8:08 PM
To: Mike Smith VE9AA
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Yamaha Headphones



If you want a Koss and an electret mike get an SB45. Basically an SB40 with 
electret instead of dynamic mike.





On Fri, Nov 18, 2022 at 8:25 AM Mike Smith VE9AA  wrote:

I have a pair of CM500's I've used extensively for the past 7-8 yrs.maybe
longer.

I typically wear them from 12-40hrs on any major contest weekend.  It would
not be an exaggeration to say

I have well in excess of 1000hrs on them. (a guess..the # might be 2 or
3k.who knows.)



All I did was wear out the bonded pleather, but liked the phones so much I
bought new velour earpads for them that cost nearly as much as the
headphones originally cost, hi. They are better than new now. No issues ever
with the headband.



Recently I bought a few sets of the Koss SB40 and by gosh they look an awful
lot like the Yamaha's..maybe made in the same factory - who knows.  They are
starting to get hard to find as well but I found mine on amazon.ca for
around $60 CDN



Good luck!



Mike VE9AA



Mike, Coreen & Corey

Keswick Ridge, NB



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-- 

Jim K0XU

j...@rhodesend.net

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-- 

73,
Jorge
CX6VM/CW5W

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Re: [Elecraft] Yamaha Headphones

[Jorge Diez - CX6VM]

hello Mike

you have both, SB45 and SB45-USB on this link
https://www.amazon.com/-/es/Koss-Estere%C3%B3fonos-de-comunicaci%C3%B3n-SB-45/dp/B00081A2CW

And really a good price, $30

73,
Jorge
CX6VM/CW5W

El lun, 21 nov 2022 a las 21:49, Mike Smith VE9AA ()
escribió:

> While that may be true Jim, the Koss SB45’s I saw on Amazon.ca (ca=Canada)
> had USB plugs on the ends of them, not the 1/8” phono type for Mic and Ear
> (stereo).
>
>
>
> I looked at many ads, and there was enough inconsistencies in the ads
> (some ads showed USB & 1/8” pictures, both) that I did not buy that
> particular model.
>
>
>
> I was headed to the Caymans for a contest expedition and time was of the
> essence, so I erred on the side of safety as there would not be enough time
> to buy the proper one later, should I have rec’d the USB ones (that were no
> good to me)
>
>
>
> Mike VE9AA (ZF2AA in CQWW SSB 2022)
>
>
>
>
>
> Mike, Coreen & Corey
>
> Keswick Ridge, NB
>
>
>
> From: Jim Rhodes [mailto:jimk...@gmail.com]
> Sent: November 21, 2022 8:08 PM
> To: Mike Smith VE9AA
> Cc: Elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Yamaha Headphones
>
>
>
> If you want a Koss and an electret mike get an SB45. Basically an SB40
> with electret instead of dynamic mike.
>
>
>
>
>
> On Fri, Nov 18, 2022 at 8:25 AM Mike Smith VE9AA 
> wrote:
>
> I have a pair of CM500's I've used extensively for the past 7-8 yrs.maybe
> longer.
>
> I typically wear them from 12-40hrs on any major contest weekend.  It would
> not be an exaggeration to say
>
> I have well in excess of 1000hrs on them. (a guess..the # might be 2 or
> 3k.who knows.)
>
>
>
> All I did was wear out the bonded pleather, but liked the phones so much I
> bought new velour earpads for them that cost nearly as much as the
> headphones originally cost, hi. They are better than new now. No issues
> ever
> with the headband.
>
>
>
> Recently I bought a few sets of the Koss SB40 and by gosh they look an
> awful
> lot like the Yamaha's..maybe made in the same factory - who knows.  They
> are
> starting to get hard to find as well but I found mine on amazon.ca for
> around $60 CDN
>
>
>
> Good luck!
>
>
>
> Mike VE9AA
>
>
>
> Mike, Coreen & Corey
>
> Keswick Ridge, NB
>
>
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to jimk...@gmail.com
>
>
>
>
>
>
> --
>
> Jim K0XU
>
> j...@rhodesend.net
>
> __
> Elecraft mailing list
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> This list hosted by: http://www.qsl.net
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> Message delivered to cx6vm.jo...@gmail.com



-- 
73,
Jorge
CX6VM/CW5W
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Re: [Elecraft] Yamaha Headphones

[Bert]

Sorry, made a mistake. I mixed it up with another headset I just bought. 
The KOSS

SB 45 came with two 3.5 mm stereo plugs, mic and phone separately.
Bert VE3NR

On 2022-11-21 19:49, Mike Smith VE9AA wrote:

While that may be true Jim, the Koss SB45’s I saw on Amazon.ca (ca=Canada) had 
USB plugs on the ends of them, not the 1/8” phono type for Mic and Ear (stereo).

  


I looked at many ads, and there was enough inconsistencies in the ads (some ads 
showed USB & 1/8” pictures, both) that I did not buy that particular model.

  


I was headed to the Caymans for a contest expedition and time was of the 
essence, so I erred on the side of safety as there would not be enough time to 
buy the proper one later, should I have rec’d the USB ones (that were no good 
to me)

  


Mike VE9AA (ZF2AA in CQWW SSB 2022)

  

  


Mike, Coreen & Corey

Keswick Ridge, NB

  


From: Jim Rhodes [mailto:jimk...@gmail.com]
Sent: November 21, 2022 8:08 PM
To: Mike Smith VE9AA
Cc:Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Yamaha Headphones

  


If you want a Koss and an electret mike get an SB45. Basically an SB40 with 
electret instead of dynamic mike.

  

  


On Fri, Nov 18, 2022 at 8:25 AM Mike Smith VE9AA  wrote:

I have a pair of CM500's I've used extensively for the past 7-8 yrs.maybe
longer.

I typically wear them from 12-40hrs on any major contest weekend.  It would
not be an exaggeration to say

I have well in excess of 1000hrs on them. (a guess..the # might be 2 or
3k.who knows.)



All I did was wear out the bonded pleather, but liked the phones so much I
bought new velour earpads for them that cost nearly as much as the
headphones originally cost, hi. They are better than new now. No issues ever
with the headband.



Recently I bought a few sets of the Koss SB40 and by gosh they look an awful
lot like the Yamaha's..maybe made in the same factory - who knows.  They are
starting to get hard to find as well but I found mine on amazon.ca for
around $60 CDN



Good luck!



Mike VE9AA



Mike, Coreen & Corey

Keswick Ridge, NB



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Re: [Elecraft] Yamaha Headphones

[Bert]

I just bought a KOSS SB45 headset and it came with a 3.5 mm TRRS plug.
Bert VE3NR



On 2022-11-21 19:49, Mike Smith VE9AA wrote:

While that may be true Jim, the Koss SB45’s I saw on Amazon.ca (ca=Canada) had 
USB plugs on the ends of them, not the 1/8” phono type for Mic and Ear (stereo).

  


I looked at many ads, and there was enough inconsistencies in the ads (some ads 
showed USB & 1/8” pictures, both) that I did not buy that particular model.

  


I was headed to the Caymans for a contest expedition and time was of the 
essence, so I erred on the side of safety as there would not be enough time to 
buy the proper one later, should I have rec’d the USB ones (that were no good 
to me)

  


Mike VE9AA (ZF2AA in CQWW SSB 2022)

  

  


Mike, Coreen & Corey

Keswick Ridge, NB

  


From: Jim Rhodes [mailto:jimk...@gmail.com]
Sent: November 21, 2022 8:08 PM
To: Mike Smith VE9AA
Cc:Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Yamaha Headphones

  


If you want a Koss and an electret mike get an SB45. Basically an SB40 with 
electret instead of dynamic mike.

  

  


On Fri, Nov 18, 2022 at 8:25 AM Mike Smith VE9AA  wrote:

I have a pair of CM500's I've used extensively for the past 7-8 yrs.maybe
longer.

I typically wear them from 12-40hrs on any major contest weekend.  It would
not be an exaggeration to say

I have well in excess of 1000hrs on them. (a guess..the # might be 2 or
3k.who knows.)



All I did was wear out the bonded pleather, but liked the phones so much I
bought new velour earpads for them that cost nearly as much as the
headphones originally cost, hi. They are better than new now. No issues ever
with the headband.



Recently I bought a few sets of the Koss SB40 and by gosh they look an awful
lot like the Yamaha's..maybe made in the same factory - who knows.  They are
starting to get hard to find as well but I found mine on amazon.ca for
around $60 CDN



Good luck!



Mike VE9AA



Mike, Coreen & Corey

Keswick Ridge, NB



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Re: [Elecraft] Yamaha Headphones

[Mike Smith VE9AA]

While that may be true Jim, the Koss SB45’s I saw on Amazon.ca (ca=Canada) had 
USB plugs on the ends of them, not the 1/8” phono type for Mic and Ear (stereo).

 

I looked at many ads, and there was enough inconsistencies in the ads (some ads 
showed USB & 1/8” pictures, both) that I did not buy that particular model.

 

I was headed to the Caymans for a contest expedition and time was of the 
essence, so I erred on the side of safety as there would not be enough time to 
buy the proper one later, should I have rec’d the USB ones (that were no good 
to me)

 

Mike VE9AA (ZF2AA in CQWW SSB 2022)

 

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

From: Jim Rhodes [mailto:jimk...@gmail.com] 
Sent: November 21, 2022 8:08 PM
To: Mike Smith VE9AA
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Yamaha Headphones

 

If you want a Koss and an electret mike get an SB45. Basically an SB40 with 
electret instead of dynamic mike.

 

 

On Fri, Nov 18, 2022 at 8:25 AM Mike Smith VE9AA  wrote:

I have a pair of CM500's I've used extensively for the past 7-8 yrs.maybe
longer.

I typically wear them from 12-40hrs on any major contest weekend.  It would
not be an exaggeration to say

I have well in excess of 1000hrs on them. (a guess..the # might be 2 or
3k.who knows.)



All I did was wear out the bonded pleather, but liked the phones so much I
bought new velour earpads for them that cost nearly as much as the
headphones originally cost, hi. They are better than new now. No issues ever
with the headband.



Recently I bought a few sets of the Koss SB40 and by gosh they look an awful
lot like the Yamaha's..maybe made in the same factory - who knows.  They are
starting to get hard to find as well but I found mine on amazon.ca for
around $60 CDN



Good luck!



Mike VE9AA



Mike, Coreen & Corey

Keswick Ridge, NB



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Jim K0XU

j...@rhodesend.net

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Re: [Elecraft] Yamaha Headphones

[Jim Rhodes]

If you want a Koss and an electret mike get an SB45. Basically an SB40 with
electret instead of dynamic mike.


On Fri, Nov 18, 2022 at 8:25 AM Mike Smith VE9AA  wrote:

> I have a pair of CM500's I've used extensively for the past 7-8 yrs.maybe
> longer.
>
> I typically wear them from 12-40hrs on any major contest weekend.  It would
> not be an exaggeration to say
>
> I have well in excess of 1000hrs on them. (a guess..the # might be 2 or
> 3k.who knows.)
>
>
>
> All I did was wear out the bonded pleather, but liked the phones so much I
> bought new velour earpads for them that cost nearly as much as the
> headphones originally cost, hi. They are better than new now. No issues
> ever
> with the headband.
>
>
>
> Recently I bought a few sets of the Koss SB40 and by gosh they look an
> awful
> lot like the Yamaha's..maybe made in the same factory - who knows.  They
> are
> starting to get hard to find as well but I found mine on amazon.ca for
> around $60 CDN
>
>
>
> Good luck!
>
>
>
> Mike VE9AA
>
>
>
> Mike, Coreen & Corey
>
> Keswick Ridge, NB
>
>
>
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Re: [Elecraft] Yamaha Headphones

[John Marvin]

Proximity effect has nothing to do with the technology of the 
transducer, i.e. dynamic, condenser, electret, ribbon, etc.


Proximity effect is due to the type of transducer, i.e. whether it is a 
pressure transducer or a pressure gradient transducer or a mix of the 
two. That determines the pickup pattern, and that also determines the 
amount of proximity effect the mike has.  A pure pressure transducer has 
an omni-directional pickup pattern and absolutely no proximity effect.  
A pure pressure gradient transducer has a figure 8 pickup pattern (i.e. 
bidirectional cardiod) and the highest level of proximity effect.  One 
of the most common pickup patterns is the cardioid pattern, which is a 
directional pattern and has a decent amount of proximity effect.


Your experience with dynamic vs. condenser mics was probably more to do 
with the pickup pattern. There are a variety of "cardioid" patterns, one 
of them being hyper cardioid, which is more prevalent in condenser 
mikes.  It is more directional than a cardioid and has further "reach", 
which would allow a vocalist to be further away from the mike and still 
be picked up well (but would fall of quicker if they moved off to the 
side).  That further distance could significantly reduce or eliminate 
proximity effect.


Another possibility is a sub cardioid pattern which is less directional 
than a standard cardioid pattern, which would also have less proximity 
effect at the same distance from the mike.


John
AC0ZG

On 11/21/2022 2:56 PM, Joe Subich, W4TV wrote:

An electret mic is much easier/cheaper to manufacture than an
equivalent dynamic capsule.  With the built-in FET follower,
the electret output is some 20-25dB higher than the dynamic
making RFI and hum reduction much easier to manage in consumer
electronics.  In addition, the electret does not suffer as
badly from the proximity effect that is common with all dynamic
mics (a benefit of using condenser mics for studio vocals -
particularly with vocalists that don't know good mic technique!).


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Re: [Elecraft] Yamaha Headphones

[Fred Jensen]

A long time ago, velocity ["ribbon"] mics were common in broadcast, 
apparently they're not any more.  Really boosted the bass if you close 
talked them.  At 17, I could crawl way up close to the RCA 44 at the 
board and sound like James Earl Jones.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Al Lorona wrote on 11/21/2022 12:03 PM:

An electret mic has much better fidelity than an inexpensive dynamic mic,
so the CM500 is probably a better choice.

Is that really true? If you looked inside all of your local AM broadcast 
stations, all you'd see are dynamic microphones.

I'm not sure why most headsets have electret mics. Maybe it's because they have 
a higher output which lessens the need for a lot of preamplification? I don't 
know.

Al  W6LX/4

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Re: [Elecraft] Yamaha Headphones

[Joe Subich, W4TV]

On 2022-11-21 3:23 PM, Walter Underwood wrote:

> Yes, a $400 dynamic mic sounds great.

Many broadcast mics are nowhere near $400 (at least not when I
was specifying/buying them).  The hand mics you typically see
in the field on TV newscasts and the lavs on anchor lapels are
(where) < $150 ... the wireless transmitters that have become
ubiquitous are more expensive than the mic!

> But a $2 electret mic element sounds nearly as good.

An electret mic is much easier/cheaper to manufacture than an
equivalent dynamic capsule.  With the built-in FET follower,
the electret output is some 20-25dB higher than the dynamic
making RFI and hum reduction much easier to manage in consumer
electronics.  In addition, the electret does not suffer as
badly from the proximity effect that is common with all dynamic
mics (a benefit of using condenser mics for studio vocals -
particularly with vocalists that don't know good mic technique!).

73,

   ... Joe, W4TV

On 2022-11-21 3:23 PM, Walter Underwood wrote:

That is exactly why I said “inexpensive” dynamic mics. Yes, a $400 dynamic mic 
sounds great. But a $2 electret mic element sounds nearly as good. Electrets 
are a really amazing technology, invented at Bell Labs. They are a cheap, 
rugged relative of the condenser mics used in studios.

Here is one for $1.50: https://www.adafruit.com/product/1064 


wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/  (my blog)


On Nov 21, 2022, at 12:03 PM, Al Lorona mailto:alor...@sbcglobal.net>> wrote:


An electret mic has much better fidelity than an inexpensive dynamic mic,
so the CM500 is probably a better choice.


Is that really true? If you looked inside all of your local AM broadcast 
stations, all you'd see are dynamic microphones.

I'm not sure why most headsets have electret mics. Maybe it's because they have 
a higher output which lessens the need for a lot of preamplification? I don't 
know.

Al  W6LX/4




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Re: [Elecraft] Yamaha Headphones

[Jim Brown]

On 11/21/2022 12:03 PM, Al Lorona wrote:

Is that really true? If you looked inside all of your local AM broadcast 
stations, all you'd see are dynamic microphones.


You're absolutely right, Al. Dynamic mics have long dominated broadcast 
announce and DJ studios. EV owned that market until the '90s, when Shure 
started making some inroads with their SM7B (which has long been one of 
several popular studio narration mics).


I'm not sure why most headsets have electret mics. 


Because they are much less expensive to build with very good sound 
quality, and because they are MUCH smaller. The electret capsule in the 
mics built into headsets and most ham mics probably costs much less than 
a buck to manufacture. I suspect that the housings for Heil mics cost a 
lot more than the capsules. NY9H, a former broadcast engineer who later 
represented a major mic mfr, and who was an early K2 builder, was the 
first to observe that the mic Elecraft sold with the K2 was a cheap 
capsule crammed into the PTT housing with a bit of foam behind it. If I 
remember correctly, was marketed as a Heil product.


Maybe it's because they have a higher output which lessens the need for 
a lot of preamplification?


Unbalanced electret mics are built with a FET-follower output stage that 
allows them to drive an unbalanced input stage with a reasonably high 
input Z, and with bias supplied between the signal pair and return 
through a high-value resistor.


When I was a kid, the most widely used mic, by far, was the carbon mic 
used in ALL telephones (back when AT&T was a monopoly, and Bell Labs was 
the premier engineering research institution on the planet). It was 
displaced (maybe in the '80s?) with the invention of the electret.


73, Jim K9YC

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Re: [Elecraft] Yamaha Headphones

[Walter Underwood]

That is exactly why I said “inexpensive” dynamic mics. Yes, a $400 dynamic mic 
sounds great. But a $2 electret mic element sounds nearly as good. Electrets 
are a really amazing technology, invented at Bell Labs. They are a cheap, 
rugged relative of the condenser mics used in studios.

Here is one for $1.50: https://www.adafruit.com/product/1064 


wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/  (my blog)

> On Nov 21, 2022, at 12:03 PM, Al Lorona  > wrote:
> 
 An electret mic has much better fidelity than an inexpensive dynamic mic, 
 so the CM500 is probably a better choice.
> 
> Is that really true? If you looked inside all of your local AM broadcast 
> stations, all you'd see are dynamic microphones. 
> 
> I'm not sure why most headsets have electret mics. Maybe it's because they 
> have a higher output which lessens the need for a lot of preamplification? I 
> don't know.
> 
> Al  W6LX/4
> 
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Re: [Elecraft] Yamaha Headphones

[Lee Hiers]

There are definitely a ton of Shure SM-7 dynamic mics used in
broadcasting...but they're not "cheap" dynamics.

73 de Lee, AA4GA

On Mon, Nov 21, 2022 at 3:03 PM Al Lorona  wrote:

> >>> An electret mic has much better fidelity than an inexpensive dynamic
> mic,
> >>> so the CM500 is probably a better choice.
>
> Is that really true? If you looked inside all of your local AM broadcast
> stations, all you'd see are dynamic microphones.
>
> I'm not sure why most headsets have electret mics. Maybe it's because they
> have a higher output which lessens the need for a lot of preamplification?
> I don't know.
>
> Al  W6LX/4
>
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Re: [Elecraft] Yamaha Headphones

[Al Lorona]

>>> An electret mic has much better fidelity than an inexpensive dynamic mic, 
>>> so the CM500 is probably a better choice.

Is that really true? If you looked inside all of your local AM broadcast 
stations, all you'd see are dynamic microphones. 

I'm not sure why most headsets have electret mics. Maybe it's because they have 
a higher output which lessens the need for a lot of preamplification? I don't 
know.

Al  W6LX/4

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Re: [Elecraft] Yamaha Headphones

[Walter Underwood]

On Nov 18, 2022, at 6:24 AM, Mike Smith VE9AA  wrote:
> 
> Recently I bought a few sets of the Koss SB40 and by gosh they look an awful
> lot like the Yamaha's..maybe made in the same factory - who knows.  They are
> starting to get hard to find as well but I found mine on amazon.ca for
> around $60 CDN

The Koss SB40 appears to be the same headset as the Yamaha CM500, but with a 
dynamic mic. My first CM500 headset actually said “KOSS” on the microphone 
plug, so yes, they are probably made in the same factory.

An electret mic has much better fidelity than an inexpensive dynamic mic, so 
the CM500 is probably a better choice.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

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Re: [Elecraft] Yamaha Headphones

[Jim KO5V]

I get the digest, but I haven't received it in a couple of days. I received 
some direct responses, so I checked the archive. Thanks to everyone who replied.

The problem is that the headphones creep a bit as I use them - and it's a 
distraction. From the responses, it seems some people have had no trouble with 
this, but others have suggested ways to cope with what I am seeing. So, there's 
probably a 50/50 chance of getting get a better set if I exchange them.

I like the way they sound, so I'll probably keep them, and try something to 
help increase the friction in the adjustment detents

73,

Jim  KO5V
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Re: [Elecraft] Yamaha Headphones

[Mike Dodd]

On 11/18/2022 9:24 AM, Mike Smith VE9AA wrote:

All I did was wear out the bonded pleather, but liked the phones so
much I bought new velour earpads for them that cost nearly as much as
the headphones originally cost, hi.


This page  shows how I replaced 
the original pads on my CM500 with generic replacements I ought on eBay 
for $6.00. They're not leather or velour, but they feel great and work fine.


73, Mike N4CF
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Re: [Elecraft] Yamaha Headphones

[Mike Smith VE9AA]

I have a pair of CM500's I've used extensively for the past 7-8 yrs.maybe
longer.

I typically wear them from 12-40hrs on any major contest weekend.  It would
not be an exaggeration to say

I have well in excess of 1000hrs on them. (a guess..the # might be 2 or
3k.who knows.)

 

All I did was wear out the bonded pleather, but liked the phones so much I
bought new velour earpads for them that cost nearly as much as the
headphones originally cost, hi. They are better than new now. No issues ever
with the headband.

 

Recently I bought a few sets of the Koss SB40 and by gosh they look an awful
lot like the Yamaha's..maybe made in the same factory - who knows.  They are
starting to get hard to find as well but I found mine on amazon.ca for
around $60 CDN

 

Good luck!

 

Mike VE9AA

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

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Re: [Elecraft] Yamaha Headphones

[Mike Dodd]

On 11/17/2022 9:54 AM, Jim KO5V wrote:

I recently purchased the Yamaha CM 500 headphones. I think the "headphone part" 
works very well, but they won't stay adjusted - the plastic friction parts are just too 
loose. I'm not nitpicking here, it's a real problem.


Scroll to the bottom of this page: 
 to see how I dealt with loose 
adjustments.


73, Mike N4CF

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Re: [Elecraft] Yamaha Headphones

[Wes]

I have three sets here and have retired others in the past.  They mostly all 
have the issue you speak of. I have a large head (why a Koss won't work for me) 
and have to expand the band to the limit.  Every time I put them on I have to 
adjust.  I've thought to just pin them or glue them in place but I just 
habitually adjust them when I put them on.


Wes  N7WS

11/17/2022 7:54 AM, Jim KO5V wrote:

I recently purchased the Yamaha CM 500 headphones. I think the "headphone part" 
works very well, but they won't stay adjusted - the plastic friction parts are just too 
loose. I'm not nitpicking here, it's a real problem.

They were cheap, so maybe I shouldn't expect more, but I'm wondering if anyone 
else had this same experience. If other people have not had this issue, I will 
return them and try another set, but maybe I should just spend the money and 
try something else.

My hearing is changing, so headphones are probably going to be necessary. As I 
said, I am happy with the Yamaha's performance. Maybe I got a lemon.

Thanks. 73, Jim KO5V


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Re: [Elecraft] Yamaha Headphones

[Nate Bargmann]

* On 2022 17 Nov 08:55 -0600, Jim KO5V wrote:
> I recently purchased the Yamaha CM 500 headphones. I think the
> "headphone part" works very well, but they won't stay adjusted - the
> plastic friction parts are just too loose. I'm not nitpicking here,
> it's a real problem.

When I'm not wearing them mine will slide to different spots when I'm
handling them.  Once I put them where I want and am wearing them,
they've always stayed in place.

Are yours slipping out of place when you're wearing them?

73, Nate, N0NB

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Re: [Elecraft] Yamaha Headphones

[David Sumner]

My two pair also work fine. One is new, one older.

Dave K1ZZ

Sent from my iPhone

> On Nov 17, 2022, at 10:07 AM, David Gilbert  wrote:
> 
> 
> My CM500 works fine, although I added cloth ear muffs for more comfort.
> 
> The friction detents in the adjustment are accessible.  Try putting some 
> rosin or other friction enhancer on them.  If you are the only one who ever 
> uses the headset and if your setting was always the same, you could probably 
> even superglue them in place.
> 
> 73,
> Dave   AB7E
> 
> 
> 
>> On 11/17/2022 7:54 AM, Jim KO5V wrote:
>> I recently purchased the Yamaha CM 500 headphones. I think the "headphone 
>> part" works very well, but they won't stay adjusted - the plastic friction 
>> parts are just too loose. I'm not nitpicking here, it's a real problem.
>> 
>> They were cheap, so maybe I shouldn't expect more, but I'm wondering if 
>> anyone else had this same experience. If other people have not had this 
>> issue, I will return them and try another set, but maybe I should just spend 
>> the money and try something else.
>> 
>> My hearing is changing, so headphones are probably going to be necessary. As 
>> I said, I am happy with the Yamaha's performance. Maybe I got a lemon.
>> 
>> Thanks. 73, Jim KO5V
>> 
>> 
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Re: [Elecraft] Yamaha Headphones

[David Gilbert]

My CM500 works fine, although I added cloth ear muffs for more comfort.

The friction detents in the adjustment are accessible.  Try putting some 
rosin or other friction enhancer on them.  If you are the only one who 
ever uses the headset and if your setting was always the same, you could 
probably even superglue them in place.


73,
Dave   AB7E



On 11/17/2022 7:54 AM, Jim KO5V wrote:

I recently purchased the Yamaha CM 500 headphones. I think the "headphone part" 
works very well, but they won't stay adjusted - the plastic friction parts are just too 
loose. I'm not nitpicking here, it's a real problem.

They were cheap, so maybe I shouldn't expect more, but I'm wondering if anyone 
else had this same experience. If other people have not had this issue, I will 
return them and try another set, but maybe I should just spend the money and 
try something else.

My hearing is changing, so headphones are probably going to be necessary. As I 
said, I am happy with the Yamaha's performance. Maybe I got a lemon.

Thanks. 73, Jim KO5V


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[Elecraft] Yamaha Headphones

[Jim KO5V]

I recently purchased the Yamaha CM 500 headphones. I think the "headphone part" 
works very well, but they won't stay adjusted - the plastic friction parts are 
just too loose. I'm not nitpicking here, it's a real problem.

They were cheap, so maybe I shouldn't expect more, but I'm wondering if anyone 
else had this same experience. If other people have not had this issue, I will 
return them and try another set, but maybe I should just spend the money and 
try something else.

My hearing is changing, so headphones are probably going to be necessary. As I 
said, I am happy with the Yamaha's performance. Maybe I got a lemon.

Thanks. 73, Jim KO5V


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[Elecraft] Yamaha Headphones

[Randy Cook]

As a brief aside, I am using a pair of Yamaha headphones (not headset)  
with my K3 (2051).  The model is HP-170.  As an audiophool of sorts, I  
appreciate the clear sound. These are VERY comfortable.  On the ear  
style, so I can still hear the louder goings on in the house, but am  
not bothered by most of the racket from two teenage boys. They  
replaced excellent, but less comfortable Sennheisers.

I have found similar Yamaha headsets at very reasonable prices on  
auction and closeout sites.

73

Randy Cook
k6...@arrl.net




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