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KX1 headphones

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Pete Spotts

Re: KX1 headphones

On Sun, 23 Aug 2009 16:16:31 -0700
"Erik N Basilier" <[hidden email]> wrote:

> For the Amateur Service with its variations in modulation
> specifications, it doesn't make any sense to me to put response
> shaping in the headphones, as we then might want multiple sets for
> multiple modes. Also, it doesn't make sense to limit the bandwidth at
> a point where it doesn't affect AGC sensing. Many years ago when it
> was hard to come by good selectivity at the IF, some bandwidth
> limitation in the headphones may have been justified for reasons of
> economical implementation. I don't know if airplane pilots' headsets
> limit frequency response, but if they do, I suspect it is a matter of
> standards being hard to change, and manufacturers not wanting cheaper
> products made for other purposes to work well.
>

Now you did it; sent me to some airline-pilot-headset sites just for
curiosity's sake. Sennheisers for AL pilots, a mere $717.00, frequency
response 16-22,000 Hz. Given my high-fi speakers at 20-20,000, sounds
like airline pilots go hi-fi too. And noise cancelling as well. Move
over Bose! Telex and Plantronics aviation headsets had no easily
accessed information on frequency response.

Interesting discussion!

With best regards,

Pete

--
Peter N. Spotts -- KC1JB
http://www.kc1jb.net (under construction)
Email: [hidden email] | Skype: pspotts
QRP-ARCI # 4174 | North American QRP CW Club # 2446
Flying Pigs QRP # 1983 | SKCC # 4853 | QCWA #34679
W5JH Black Widow paddle #601

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n7ws

Re: KX1 headphones

Actually I do have a "communications" headset in the form of a David Clark H10-30.

http://www.davidclark.com/avHeadsetSpecs/avSpecs.aspx?ModelName=H10-30

Wearing these is close to putting your head in a vise since they are designed as hearing protection as well as communicating.

Wes N7WS

--- On Sun, 8/23/09, Peter N. Spotts <[hidden email]> wrote:

> From: Peter N. Spotts <[hidden email]>
> Subject: Re: [Elecraft] KX1 headphones
> To: [hidden email]
> Date: Sunday, August 23, 2009, 5:59 PM
> On Sun, 23 Aug 2009 16:16:31 -0700
> "Erik N Basilier" <[hidden email]>
> wrote:
>
> > For the Amateur Service with its variations in
> modulation
> > specifications, it doesn't make any sense to me to put
> response
> > shaping in the headphones, as we then might want
> multiple sets for
> > multiple modes. Also, it doesn't make sense to limit
> the bandwidth at
> > a point where it doesn't affect AGC sensing. Many
> years ago when it
> > was hard to come by good selectivity at the IF, some
> bandwidth
> > limitation in the headphones may have been justified
> for reasons of
> > economical implementation. I don't know if airplane
> pilots' headsets
> > limit frequency response, but if they do, I suspect it
> is a matter of
> > standards being hard to change, and manufacturers not
> wanting cheaper
> > products made for other purposes to work well.
> >
>
>
> Now you did it; sent me to some airline-pilot-headset
> sites just for
> curiosity's sake. Sennheisers for AL pilots, a mere
> $717.00, frequency
> response 16-22,000 Hz. Given my high-fi speakers at
> 20-20,000, sounds
> like airline pilots go hi-fi too. And noise cancelling as
> well. Move
> over Bose! Telex and Plantronics aviation headsets had no
> easily
> accessed information on frequency response.
>
> Interesting discussion!
>
> With best regards,
>
> Pete
>
>
>
>
>
>
>
> --
> Peter N. Spotts -- KC1JB
> http://www.kc1jb.net (under construction)
> Email: [hidden email] |
> Skype: pspotts
> QRP-ARCI # 4174 | North American QRP CW Club # 2446
> Flying Pigs QRP # 1983 | SKCC # 4853 | QCWA #34679
> W5JH Black Widow paddle #601
>

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Brett Howard

Re: KX1 headphones

This is one reason why I like the IEM's (in ear monitors) which seal
into your ear and provide excellent outside noise attenuation. I
consider noise cancellation nothing more than introduction of
distortion.

~Brett (KC7OTG)

On Sun, 2009-08-23 at 17:40 -0700, Wes Stewart wrote:

> Actually I do have a "communications" headset in the form of a David Clark H10-30.
>
> http://www.davidclark.com/avHeadsetSpecs/avSpecs.aspx?ModelName=H10-30
>
> Wearing these is close to putting your head in a vise since they are designed as hearing protection as well as communicating.
>
> Wes N7WS
>
> --- On Sun, 8/23/09, Peter N. Spotts <[hidden email]> wrote:
>
> > From: Peter N. Spotts <[hidden email]>
> > Subject: Re: [Elecraft] KX1 headphones
> > To: [hidden email]
> > Date: Sunday, August 23, 2009, 5:59 PM
> > On Sun, 23 Aug 2009 16:16:31 -0700
> > "Erik N Basilier" <[hidden email]>
> > wrote:
> >
> > > For the Amateur Service with its variations in
> > modulation
> > > specifications, it doesn't make any sense to me to put
> > response
> > > shaping in the headphones, as we then might want
> > multiple sets for
> > > multiple modes. Also, it doesn't make sense to limit
> > the bandwidth at
> > > a point where it doesn't affect AGC sensing. Many
> > years ago when it
> > > was hard to come by good selectivity at the IF, some
> > bandwidth
> > > limitation in the headphones may have been justified
> > for reasons of
> > > economical implementation. I don't know if airplane
> > pilots' headsets
> > > limit frequency response, but if they do, I suspect it
> > is a matter of
> > > standards being hard to change, and manufacturers not
> > wanting cheaper
> > > products made for other purposes to work well.
> > >
> >
> >
> > Now you did it; sent me to some airline-pilot-headset
> > sites just for
> > curiosity's sake. Sennheisers for AL pilots, a mere
> > $717.00, frequency
> > response 16-22,000 Hz. Given my high-fi speakers at
> > 20-20,000, sounds
> > like airline pilots go hi-fi too. And noise cancelling as
> > well. Move
> > over Bose! Telex and Plantronics aviation headsets had no
> > easily
> > accessed information on frequency response.
> >
> > Interesting discussion!
> >
> > With best regards,
> >
> > Pete
> >
> >
> >
> >
> >
> >
> >
> > --
> > Peter N. Spotts -- KC1JB
> > http://www.kc1jb.net (under construction)
> > Email: [hidden email] |
> > Skype: pspotts
> > QRP-ARCI # 4174 | North American QRP CW Club # 2446
> > Flying Pigs QRP # 1983 | SKCC # 4853 | QCWA #34679
> > W5JH Black Widow paddle #601
> >
>
>
>
>
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Mike Fitzgibbon

Re: KX1 Headphones

In reply to this post by K7TV

Here(below) are the Sennheisers that I use...they work great with the
KX1...plenty of volume. I have the original HD25 Studio Monitors...not
the IIs...but they are probably the same... They are not cheap, but
worth the 150 bux I paid for them back a few years. I use them with all
the qrp rigs. They are that good. They are also quite light and very
comfortable.

The one effect you see with cheap headphones is an over-emphasis of the
higher audio frequencies...that makes the hiss(that we commonly
encounter with receiver circuits) quite a bit louder. These phones have
a very level frequency response and just plain sound great...they are
easy to listen to(and wear) for long periods. I used to be heavily
into the audiophile stuff(back in the 70's) and have owned several sets
of Sennheisers...and still do...they are the Mercedes of phones...I
fully recommend them if you want this type of phone.

Fitz N0MF

http://www.sennheiser.com/sennheiser/home_en.nsf/root/private_headphones_dj-headphones-hd-25-sp-ii?Open&path=private_headphones_dj-headphones

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K7TV

Re: KX1 Headphones

Sennheiser makes good phones. I still have a pair somewhere (414's I think),
but gave up on them years ago because replacement cords were too expensive
relative to their modest robustness. Of course your HD25's are probably
better made than the 414's. Anyway, now I use AKG's for home qth operation,
with much better made cords. However, I wouldn't carry either in a backpack,
they are just too big and heavy.

73,
Erik K7TV

----- Original Message -----
From: "Mike Fitzgibbon" <[hidden email]>
To: "Elecraft list" <[hidden email]>
Sent: Sunday, August 23, 2009 8:48 PM
Subject: Re: [Elecraft] KX1 Headphones

> Here(below) are the Sennheisers that I use...they work great with the
> KX1...plenty of volume. I have the original HD25 Studio Monitors...not

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John Gibson

Re: KX1 headphones

In reply to this post by Brett Howard

A couple of years ago I decided that I wanted new headphones, so I checked
ratings on eHam and bought a pair that featured a frequency response tailored for
communications use.

When I tried the new headphones, I found them comfortable to wear, but it soon
became apparent that they exacerbated noisy band conditions; it was like
listening in a rain barrel. I then set the new headphones aside and went back to a
much older pair with a nominally flat frequency response that I find much easier
to listen to.

73,
John, no8v

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w8fn

Re: KX1 Headphones

In reply to this post by Mike Fitzgibbon

>The one effect you see with cheap headphones is an over-emphasis of the
>higher audio frequencies...that makes the hiss(that we commonly
>encounter with receiver circuits) quite a bit louder.

Watch out for the cheapies with "MegaBass", too. They have a
grotesque hump in their frequency response at around 60 Hz, the old
"Wurlitzer effect", that makes them sound really bad.

If you're looking for closed type phones that cover the entire ear,
I've personally settled on the Extreme Isolation EX-29 phones. They
really do have 29 dB or so of external sound isolation together with
great full-spectrum response. They're designed primarily for
musicians, especially drummers, who need to monitor their own parts
over a surrounding band. These are the only phones at a decent price
I have ever found that let me use transmit monitoring with a boom
microphone with zero feedback problems. I glued a boom microphone
from a defunct Heil BM-10 set to one earcup and ended up with a
really great combination. At around $100 street price, they're a good value.

73...
Randy, W8FN

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