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New Heil Elite iC pro set with HC-6

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Linda and Bob

New Heil Elite iC pro set with HC-6

Does anyone use the newer Heil Pro iC Elite headset with the HC-6 element? Elecraft does not have that model available. I imagine that you will have to set the bias voltage for the mic. Can you use this with the K3 mic/earphone adapter? Is that a separate option from Elecraft?

How well does the Elecraft Heil Pro iC headset work with the K3? Do I need to spend more money on the HC-6 version? Thanks.

Bob Wilderman, K3SRO
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Robert Mitilieri - N9EF

Re: New Heil Elite iC pro set with HC-6

I have the Heil Pro Elite HC6 (not the Pro iC) and it works great with the K3. I've adjusted the TX equalizer to make it sound almost like the Heil Goldline and set another TX equalizer setting to make it sound like an HC5. The Pro Elite uses the same adapter as the the other Heil boomsets that don't need bias (the Kenwood adapter).

The HC6 has a very wide response curve and I needed to adjust the first three equalizer bands way down or it sounded very muddy. I also boosted the highs to add some presence but that may depend on your voice.

Robert N9EF

On Aug 26, 2010, at 6:44 PM, Linda and Bob wrote:

> Does anyone use the newer Heil Pro iC Elite headset with the HC-6 element? Elecraft does not have that model available. I imagine that you will have to set the bias voltage for the mic. Can you use this with the K3 mic/earphone adapter? Is that a separate option from Elecraft?
>
> How well does the Elecraft Heil Pro iC headset work with the K3? Do I need to spend more money on the HC-6 version? Thanks.
>
> Bob Wilderman, K3SRO
> [hidden email]
>

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Joe Subich, W4TV-4

Re: New Heil Elite iC pro set with HC-6

In reply to this post by Linda and Bob

> Does anyone use the newer Heil Pro iC Elite headset with the HC-6
> element? Elecraft does not have that model available. I imagine that
> you will have to set the bias voltage for the mic.

The Heil HC elements are dynamic ... no bias!

> Can you use this with the K3 mic/earphone adapter?

It's a mic PTT adapter (Heil AD1-K).

> How well does the Elecraft Heil Pro iC headset work with the K3? Do I
> need to spend more money on the HC-6 version?

I'd strongly recommend the Yamaha CM-500 instead of any Heil headset.
The CM-500 is every bit the equal of the Heil ProSet iC for less than
1/3 the price (ca., $45 at B&H Photovideo). The CM-500 mic behaves
just the same as the iC element ... roll off the bottom three bands
and add some modest boost at 1600/2400/3200 Hz and you will have super
audio with plenty of punch.

73,

... Joe, W4TV

On 8/26/2010 7:44 PM, Linda and Bob wrote:

> Does anyone use the newer Heil Pro iC Elite headset with the HC-6
> element? Elecraft does not have that model available. I imagine that
> you will have to set the bias voltage for the mic. Can you use this
> with the K3 mic/earphone adapter? Is that a separate option from
> Elecraft?
>
> How well does the Elecraft Heil Pro iC headset work with the K3? Do I
> need to spend more money on the HC-6 version? Thanks.
>
> Bob Wilderman, K3SRO [hidden email]
> ______________________________________________________________
> Elecraft mailing list Home:
> http://mailman.qth.net/mailman/listinfo/elecraft Help:
> http://mailman.qth.net/mmfaq.htm Post:
> mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this
> email list: http://www.qsl.net/donate.html
>

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Gary Gregory

Re: New Heil Elite iC pro set with HC-6

Joe,

Good advice. I concur

I have never been happy with any of the 3 Heil Mic's I have had. Too much
money for so little quality..just my 2cents..keep the change!...(:-))

Gary

On Fri, Aug 27, 2010 at 10:53 AM, Joe Subich, W4TV <[hidden email]> wrote:

>
> > Does anyone use the newer Heil Pro iC Elite headset with the HC-6
> > element? Elecraft does not have that model available. I imagine that
> > you will have to set the bias voltage for the mic.
>
> The Heil HC elements are dynamic ... no bias!
>
> > Can you use this with the K3 mic/earphone adapter?
>
> It's a mic PTT adapter (Heil AD1-K).
>
> > How well does the Elecraft Heil Pro iC headset work with the K3? Do I
> > need to spend more money on the HC-6 version?
>
> I'd strongly recommend the Yamaha CM-500 instead of any Heil headset.
> The CM-500 is every bit the equal of the Heil ProSet iC for less than
> 1/3 the price (ca., $45 at B&H Photovideo). The CM-500 mic behaves
> just the same as the iC element ... roll off the bottom three bands
> and add some modest boost at 1600/2400/3200 Hz and you will have super
> audio with plenty of punch.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 8/26/2010 7:44 PM, Linda and Bob wrote:
> > Does anyone use the newer Heil Pro iC Elite headset with the HC-6
> > element? Elecraft does not have that model available. I imagine that
> > you will have to set the bias voltage for the mic. Can you use this
> > with the K3 mic/earphone adapter? Is that a separate option from
> > Elecraft?
> >
> > How well does the Elecraft Heil Pro iC headset work with the K3? Do I
> > need to spend more money on the HC-6 version? Thanks.
> >
> > Bob Wilderman, K3SRO [hidden email]
> > ______________________________________________________________
> > Elecraft mailing list Home:
> > http://mailman.qth.net/mailman/listinfo/elecraft Help:
> > http://mailman.qth.net/mmfaq.htm Post:
> > mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net Please help support this
> > email list: http://www.qsl.net/donate.html
> >
> ______________________________________________________________
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Nr4c

Re: New Heil Elite iC pro set with HC-6

In reply to this post by Linda and Bob

>From Heil advertising, the HC-6 is a Dynamic Element, not an electret type
like the IC units they make for ICOM and others including Elecraft.
Therefore it does not require BIAS and would use the regular Kenwood adapter
for front panel connections.

I have had great success with the Yamaha CM-500 headset, and it plugs right
into the real jacks.

...bd nr4c s/n K3-4536

-----Original Message-----
From: Linda and Bob [mailto:[hidden email]]
Sent: Thursday, August 26, 2010 7:44 PM
To: [hidden email]
Subject: [Elecraft] New Heil Elite iC pro set with HC-6

Does anyone use the newer Heil Pro iC Elite headset with the HC-6 element?
Elecraft does not have that model available. I imagine that you will have to
set the bias voltage for the mic. Can you use this with the K3 mic/earphone
adapter? Is that a separate option from Elecraft?

How well does the Elecraft Heil Pro iC headset work with the K3? Do I need
to spend more money on the HC-6 version? Thanks.

Bob Wilderman, K3SRO
[hidden email]
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Mike Reublin

Re: New Heil Elite iC pro set with HC-6

In reply to this post by Joe Subich, W4TV-4

+ 1 on the Yamaha CM-500 recommendation. And I have a Heil.

73, Mike NF4L

On 8/26/2010 8:53 PM, Joe Subich, W4TV wrote:

> > Does anyone use the newer Heil Pro iC Elite headset with the HC-6
> > element? Elecraft does not have that model available. I imagine that
> > you will have to set the bias voltage for the mic.
>
> The Heil HC elements are dynamic ... no bias!
>
> > Can you use this with the K3 mic/earphone adapter?
>
> It's a mic PTT adapter (Heil AD1-K).
>
> > How well does the Elecraft Heil Pro iC headset work with the K3? Do I
> > need to spend more money on the HC-6 version?
>
> I'd strongly recommend the Yamaha CM-500 instead of any Heil headset.
> The CM-500 is every bit the equal of the Heil ProSet iC for less than
> 1/3 the price (ca., $45 at B&H Photovideo). The CM-500 mic behaves
> just the same as the iC element ... roll off the bottom three bands
> and add some modest boost at 1600/2400/3200 Hz and you will have super
> audio with plenty of punch.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 8/26/2010 7:44 PM, Linda and Bob wrote:
>> Does anyone use the newer Heil Pro iC Elite headset with the HC-6
>> element? Elecraft does not have that model available. I imagine that
>> you will have to set the bias voltage for the mic. Can you use this
>> with the K3 mic/earphone adapter? Is that a separate option from
>> Elecraft?
>>
>> How well does the Elecraft Heil Pro iC headset work with the K3? Do I
>> need to spend more money on the HC-6 version? Thanks.
>>
>> Bob Wilderman, K3SRO [hidden email]
>> ______________________________________________________________
>> Elecraft mailing list Home:
>> http://mailman.qth.net/mailman/listinfo/elecraft Help:
>> http://mailman.qth.net/mmfaq.htm Post:
>> mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Don Wilhelm-4

Re: New Heil Elite iC pro set with HC-6

In reply to this post by Joe Subich, W4TV-4

Joe,

The Proset iC is an electret element designed for use with Icom radios.
All Heil microphones are not created equal, the type designation is
important.
Yes, I believe Heil products are overpriced, but that is a different story.

73,
Don W3FPR

On 8/26/2010 8:53 PM, Joe Subich, W4TV wrote:

Richard-3

Re: New Heil Elite iC pro set with HC-6

In reply to this post by Joe Subich, W4TV-4

Hi Joe. Using a CM-500 and microKeyer II, are you plugging into the
mKer or directly into the back panel of the K3?
Thanks.
Rich
NU6T

Joe Subich, W4TV wrote:

> <snip>
>
> I'd strongly recommend the Yamaha CM-500 instead of any Heil headset.
> The CM-500 is every bit the equal of the Heil ProSet iC for less than
> 1/3 the price (ca., $45 at B&H Photovideo). The CM-500 mic behaves
> just the same as the iC element ... roll off the bottom three bands
> and add some modest boost at 1600/2400/3200 Hz and you will have super
> audio with plenty of punch.
>
> 73,
>
> ... Joe, W4TV

Joe Subich, W4TV-4

Re: New Heil Elite iC pro set with HC-6

In reply to this post by Don Wilhelm-4

Don,

> The Proset iC is an electret element designed for use with Icom
> radios. All Heil microphones are not created equal, the type
> designation is important.

The original question (which I quoted) mixed the two elements but the
answers are still correct: the HC6 element should have no bias and the
CM-500 performs as well or better than either the Proset Elite iC or
Proset Elite HC6.

The Proset Elite is available in two versions HC-6 ("full range dynamic
broadcast element") and iC ("specially designed high performance
electret condenser"). The iC element is used in all of the Heil "iC
mics" including the Proset K2/K3, Proset iC, Proset Elite iC, Quiet
Phone iC, BM10 iC, Handi Mic iC, and iCM .

The Yamaha mic is spec'd at 100 - 20K vs. 80 - 12.5K for the iC element
or 100 - 12.5K for the HC-6.

In either case, the difference in specifications are insignificant
and certainly don't justify 3 x the price - street prices: $44 for
CM-500 (B&H Photo) vs. $149 for Proset Elite HC6 or $159 for Proset
Elite iC (R & L Electronics).

73,

... Joe, W4TV

On 8/26/2010 10:04 PM, Don Wilhelm wrote:

> Joe,
>
> The Proset iC is an electret element designed for use with Icom radios.
> All Heil microphones are not created equal, the type designation is
> important.
> Yes, I believe Heil products are overpriced, but that is a different story.
>
> 73,
> Don W3FPR
>
> On 8/26/2010 8:53 PM, Joe Subich, W4TV wrote:
>> > Does anyone use the newer Heil Pro iC Elite headset with the HC-6
>> > element? Elecraft does not have that model available. I imagine that
>> > you will have to set the bias voltage for the mic.
>>
>> The Heil HC elements are dynamic ... no bias!
>>
>> > Can you use this with the K3 mic/earphone adapter?
>>
>> It's a mic PTT adapter (Heil AD1-K).
>>
>> > How well does the Elecraft Heil Pro iC headset work with the K3? Do I
>> > need to spend more money on the HC-6 version?
>>
>

AD4C2009

Re: New Heil Elite iC pro set with HC-6

In reply to this post by Gary Gregory

100% agree,I have been using the CM-500 for almost a year now on my K3,TX and RX audio is awesome,construction quality is superior to Heil boomsets,and the price is just $54 instead of over a hundred from Heil,you can have it on your easrs for many hours without been feeling tired.Either for punchy dx audio or for ESSB wider audio,the CM-500 have to be the choice,73

AD4C

"If you see a driver handling a cell phone on her/his hands while driving,do please stay away from that vehicle,its a moving bomb.Your life is at danger.Keep yourself and your family alive"

--- On Fri, 8/27/10, Gary Gregory <[hidden email]> wrote:

From: Gary Gregory <[hidden email]>
Subject: Re: [Elecraft] New Heil Elite iC pro set with HC-6
To: "Joe Subich, W4TV" <[hidden email]>
Cc: [hidden email]
Date: Friday, August 27, 2010, 12:59 AM

Joe,

Good advice. I concur

I have never been happy with any of the 3 Heil Mic's I have had. Too much
money for so little quality..just my 2cents..keep the change!...(:-))

Gary

On Fri, Aug 27, 2010 at 10:53 AM, Joe Subich, W4TV <[hidden email]> wrote:

--
Gary
VK4FD - Motorhome Mobile
http://www.qsl.net/vk4fd/
K3 #679
For everything else there's Mastercard!!!
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Dave Hachadorian

Re: Yamaha CM-500 (was Heil Elite thread)

--------------------------------------------------
From: "Hector Padron" <[hidden email]>
Sent: Friday, August 27, 2010 10:33 AM
To: "Gary Gregory" <[hidden email]>
Cc: <[hidden email]>
Subject: Re: [Elecraft] New Heil Elite iC pro set with HC-6

> 100% agree,I have been using the CM-500 for almost a year now
> on my K3,TX and RX audio is awesome,construction quality is
> superior to Heil boomsets,and the price is just $54
---------------------------------------------

$44.99, free shipping, no tax for most:

http://www.samash.com/webapp/wcs/stores/servlet/product_CM500%20Headphones%20with%20Microphone_-1_10052_10002_-49969751?cm_mmc=Froogle-_-Studio%20Headphones-_-CM500%20Headphones%20with%20Microphone-_-YCM500XXX

Dave Hachadorian, K6LL
Big Bear Lake, CA

.

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Lu Romero - W4LT

Re: New Heil Elite iC pro set with HC-6

In reply to this post by Linda and Bob

Add my vote for the Yamaha CM500.

I have retired my BM5-4, BM10-4 and my Koss SB40 modified
with a DX4 capsule and moved my ProSet DX4 to the "portable"
kit.

I use the CM500 exclusively now with great results, plus, my
glasses small piano wire frame legs dont cause creases in my
temples anymore.

The CM500 is extremely comfortable and sounds just
wonderful, both for receiving and transmitting!

-lu-w4lt-

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ussv dharma

Re: Yamaha CM-500 (was Heil Elite thread)

In reply to this post by Dave Hachadorian

what impedance is the headphone jack on the k3?

If you don't change direction you WILL arrive exactly where you're headed!! Susan Meckley, Skipper W7KFI-mm AFA9SM USSV DHARMA

--- On Fri, 8/27/10, Dave Hachadorian <[hidden email]> wrote:

> From: Dave Hachadorian <[hidden email]>
> Subject: Re: [Elecraft] Yamaha CM-500 (was Heil Elite thread)
> To: "Elecraft Reflector" <[hidden email]>
> Date: Friday, August 27, 2010, 8:49 AM
> --------------------------------------------------
> From: "Hector Padron" <[hidden email]>
> Sent: Friday, August 27, 2010 10:33 AM
> To: "Gary Gregory" <[hidden email]>
> Cc: <[hidden email]>
> Subject: Re: [Elecraft] New Heil Elite iC pro set with
> HC-6
>
> > 100% agree,I have been using the CM-500 for almost a
> year now
> > on my K3,TX and RX audio is awesome,construction
> quality is
> > superior to Heil boomsets,and the price is just $54
> ---------------------------------------------
>
>
> $44.99, free shipping, no tax for most:
>
> http://www.samash.com/webapp/wcs/stores/servlet/product_CM500%20Headphones%20with%20Microphone_-1_10052_10002_-49969751?cm_mmc=Froogle-_-Studio%20Headphones-_-CM500%20Headphones%20with%20Microphone-_-YCM500XXX
>
> Dave Hachadorian, K6LL
> Big Bear Lake, CA
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> .
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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> Please help support this email list: http://www.qsl.net/donate.html
>

Dave Hachadorian

Re: Yamaha CM-500 (was Heil Elite thread)

> what impedance is the headphone jack on the k3?

----------------------------------------------------
>From Lyle on 6/28/2010:

The LM4811 headphone amplifier provides maximum power transfer
into a 16 ohm load (105 mW), and 70mW into a 32 ohm load. As
you increase the load impedance, the headphone driver becomes
voltage limited. If you reduce the impedance too much, it
will become current limited. There are 8.2 ohm resistors in
series with left and right channel outputs of the LM4811 and
the front panel headphone jack, and another pair of 8.2
ohm resistors in series from the LM4811 to the rear panel
headphone jack. The resistors protect the headphone amplifier
from short circuits, and also reduce the effect of reduced
output in one set of headphones if another set is plugged
into the other headphone jack.

73,

Lyle KK7P
------------------------------------------
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P.B. Christensen

Re: Yamaha CM-500 (was Heil Elite thread)

The 8.2 ohm build-out resistors set the output Z of the K3's headphone amp.
Although not specified on the LM4811 datasheet, the output Z of the LM4811
is very low and is only a small fraction of the external build-out
resistance. So, I think it's safe to say that the K3's headphone output Z
is 8-ohms.

Don't try to strictly match headphone Z with the K3's 8-ohm output Z.
Although the LM4811 is specified to produce maximum power transfer at
16-ohms, headphone sensitivity can vary across models and brands. So, it's
possible that a set of headphones with a specified Z of 32 ohms could
produce more sound-pressure-level (SPL) than a set of phones with a
specified Z of 16 ohms.

Headphone driver technology has come a long way since the development of the
standard 8-ohm moving coil. Headphones that produce the most SPL per 1 mW
of audio input power are the most efficient. But, as purchasing factors,
sensitivity needs to be balanced with comfort, reliability and price.

Paul, W9AC

----- Original Message -----
From: "Dave Hachadorian" <[hidden email]>
To: "Elecraft Reflector" <[hidden email]>
Sent: Friday, August 27, 2010 4:29 PM
Subject: Re: [Elecraft] Yamaha CM-500 (was Heil Elite thread)

>> what impedance is the headphone jack on the k3?
>
>
> ----------------------------------------------------
>>From Lyle on 6/28/2010:
>
> The LM4811 headphone amplifier provides maximum power transfer
> into a 16 ohm load (105 mW), and 70mW into a 32 ohm load. As
> you increase the load impedance, the headphone driver becomes
> voltage limited. If you reduce the impedance too much, it
> will become current limited. There are 8.2 ohm resistors in
> series with left and right channel outputs of the LM4811 and
> the front panel headphone jack, and another pair of 8.2
> ohm resistors in series from the LM4811 to the rear panel
> headphone jack. The resistors protect the headphone amplifier
> from short circuits, and also reduce the effect of reduced
> output in one set of headphones if another set is plugged
> into the other headphone jack.
>
> 73,
>
> Lyle KK7P
> ------------------------------------------
> ______________________________________________________________
> Elecraft mailing list
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>

Joe Subich, W4TV-4

Re: Yamaha CM-500 (was Heil Elite thread)

In reply to this post by ussv dharma

Headphone and speaker outputs in modern electronic devices
don't really have "impedance" values in the same sense as
older tube type amplifiers with transformer coupled outputs.
Modern audio outputs are generally act like current sources.
The total power output based on the ability of the amplifier
to provide current at the supply voltage.

The headphone amplifier in the K3 is an LM4811 specified for
105mW (continuous average power) into a 16 Ohm load and 70
mW into a 32 Ohm load. However, that does not tell the whole
story ... higher impedance transducers (headphones and speakers)
are usually more sensitive - that is they generate more sound
pressure (e.g., volume) for a given amount of power than lower
impedance transducers.

The greater sensitivity of the higher impedance headphones
means that the audio output of most transceivers (including
the K3) is more than adequate with the "professional" style
headphones with their higher impedance even though the audio
amplifiers may not provide their full 4, 8 or 16 Ohm rated
power output.

73,

... Joe, W4TV

On 8/27/2010 4:18 PM, ussv dharma wrote:
> what impedance is the headphone jack on the k3?
>
> If you don't change direction you WILL arrive exactly where you're
> headed!!
> Susan Meckley, Skipper W7KFI-mm AFA9SM
> USSV DHARMA

>
>
> --- On Fri, 8/27/10, Dave Hachadorian<[hidden email]> wrote:
>
>> From: Dave Hachadorian<[hidden email]>
>> Subject: Re: [Elecraft] Yamaha CM-500 (was Heil Elite thread)
>> To: "Elecraft Reflector"<[hidden email]>
>> Date: Friday, August 27, 2010, 8:49 AM
>> --------------------------------------------------
>> From: "Hector Padron"<[hidden email]>
>> Sent: Friday, August 27, 2010 10:33 AM
>> To: "Gary Gregory"<[hidden email]>
>> Cc:<[hidden email]>
>> Subject: Re: [Elecraft] New Heil Elite iC pro set with
>> HC-6
>>
>>> 100% agree,I have been using the CM-500 for almost a
>> year now
>>> on my K3,TX and RX audio is awesome,construction
>> quality is
>>> superior to Heil boomsets,and the price is just $54
>> ---------------------------------------------
>>
>>
>> $44.99, free shipping, no tax for most:
>>
>> http://www.samash.com/webapp/wcs/stores/servlet/product_CM500%20Headphones%20with%20Microphone_-1_10052_10002_-49969751?cm_mmc=Froogle-_-Studio%20Headphones-_-CM500%20Headphones%20with%20Microphone-_-YCM500XXX
>>
>> Dave Hachadorian, K6LL
>> Big Bear Lake, CA
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> .
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
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>>
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>
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AC7AC

Re: Yamaha CM-500 (was Heil Elite thread)

In reply to this post by ussv dharma

CONTENTS DELETED

The author has deleted this message.

ussv dharma

Re: Yamaha CM-500 (was Heil Elite thread)

the yamaha cm500 are 120 ohms...is this ok with the K3

If you don't change direction you WILL arrive exactly where you're headed!! Susan Meckley, Skipper W7KFI-mm AFA9SM USSV DHARMA

--- On Fri, 8/27/10, Ron D'Eau Claire <[hidden email]> wrote:

> From: Ron D'Eau Claire <[hidden email]>
> Subject: RE: [Elecraft] Yamaha CM-500 (was Heil Elite thread)
> To: "'ussv dharma'" <[hidden email]>, "'Elecraft Reflector'" <[hidden email]>
> Date: Friday, August 27, 2010, 12:13 PM
> As you've seen from other comments,
> the impedance requirement is rather
> broad.
>
> As a benchmark in the "real world" I can hurt my ears
> easily with a pair in
> inexpensive 60 ohm phones by turning up the volume too
> loud.
>
> Ron AC7AC
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]]
> On Behalf Of ussv dharma
> Sent: Friday, August 27, 2010 1:19 PM
> To: Elecraft Reflector; Dave Hachadorian
> Subject: Re: [Elecraft] Yamaha CM-500 (was Heil Elite
> thread)
>
> what impedance is the headphone jack on the k3?
>
> If you don't change direction you WILL arrive exactly
> where you're
> headed!! Susan Meckley, Skipper W7KFI-mm
> AFA9SM
> USSV DHARMA
>
>
>

Joe Subich, W4TV-4

Re: Yamaha CM-500 (was Heil Elite thread)

> the yamaha cm500 are 120 ohms...is this ok with the K3

Absolutely ... there are dozens on this list using them
with the K3. Headphones are sensitive enough that I can
hear them across the room if the volume is turned up.

73,

... Joe, W4TV

On 8/27/2010 11:03 PM, ussv dharma wrote:

> the yamaha cm500 are 120 ohms...is this ok with the K3
>
> If you don't change direction you WILL arrive exactly where you're headed!! Susan Meckley, Skipper W7KFI-mm AFA9SM USSV DHARMA
>
>
> --- On Fri, 8/27/10, Ron D'Eau Claire<[hidden email]> wrote:
>
>> From: Ron D'Eau Claire<[hidden email]>
>> Subject: RE: [Elecraft] Yamaha CM-500 (was Heil Elite thread)
>> To: "'ussv dharma'"<[hidden email]>, "'Elecraft Reflector'"<[hidden email]>
>> Date: Friday, August 27, 2010, 12:13 PM
>> As you've seen from other comments,
>> the impedance requirement is rather
>> broad.
>>
>> As a benchmark in the "real world" I can hurt my ears
>> easily with a pair in
>> inexpensive 60 ohm phones by turning up the volume too
>> loud.
>>
>> Ron AC7AC
>>
>> -----Original Message-----
>> From: [hidden email]
>> [mailto:[hidden email]]
>> On Behalf Of ussv dharma
>> Sent: Friday, August 27, 2010 1:19 PM
>> To: Elecraft Reflector; Dave Hachadorian
>> Subject: Re: [Elecraft] Yamaha CM-500 (was Heil Elite
>> thread)
>>
>> what impedance is the headphone jack on the k3?
>>
>> If you don't change direction you WILL arrive exactly
>> where you're
>> headed!! Susan Meckley, Skipper W7KFI-mm
>> AFA9SM
>> USSV DHARMA
>>
>>
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Jim Brown-10

Re: Yamaha CM-500 (was Heil Elite thread)

In reply to this post by ussv dharma

On Fri, 27 Aug 2010 20:03:50 -0700 (PDT), ussv dharma wrote:

>the yamaha cm500 are 120 ohms...is this ok with the K3

YES. Pardon my frustration, but how many times must we repeat this?

AUDIO SYSTEMS HAVE NOT BEEN IMPEDANCE MATCHED FOR NEARLY 50 YEARS!
Audio output stages have very low output impedance, and are
designed to drive load impedances that are much higher (a rule of
thumb is about 100 times higher.

A speaker output stage typically has an output impedance of a tiny
fraction of an ohm, and is designed to drive any impedance from
about 4 ohms up, and will give its highest output with a load of
about 4 ohms, and its best performance with any load above 4 ohms.
Headphone amps are simply small versions of this, and typically
have an 4-8 ohm resistor in series to protect the output stage from
a short circuit as a headset is plugged in, or is wired improperly,
but the impedance of the output stage itself is typically a
fraction of an ohm.

Likewise, the output impedance of line level output stages is
typically 100 ohms for a pro product and 200-300 ohms for a
consumer product. Pro products are rated to drive a 600 ohm load,
but they give their best performance with a 10K ohm load. Consumer
output stages are designed to drive about 47K ohms.

Pro mics typically have output impedances between 100 ohms and 300
ohms, and are designed to drive impedances at least 5X their rated
impedance. Many condenser mics specify a minimum load impedance of
1,000 ohms.

73, Jim K9YC

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