Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Christopher Hoover]

I just ordered the Amp800's smaller cousin, Behringer Microamp Ha400
Ultra-Compact 4-Channel Stereo Headphone Amplifier
,
for exactly this purpose.


On Wed, Jun 21, 2017 at 4:55 AM, KENT TRIMBLE  wrote:

> Headphones and Field Day have been yoked since time immemorial.  The K3's
> ability to output its audio into both headphones and speakers
> simultaneously has been a boon to those FD sites that encourage visitors.
> It permits the operator/logger to use headphones while visitors can monitor
> the action through speakers.  The problem lies in the volume levels that
> each of the participants require (or don't require).  This is especially
> true when multiple transceivers are occupying the same tent/trailer/room,
> etc., and each have their own group of listeners.  Cacophony is not the
> goal here.
>
> As veteran Field-Day clubs have discovered over the years, a valuable
> accessory is a multi-outlet headphone-amplifier with individual volume
> controls for each headphone.  For several years we have used a Behringer
> Amp800 (https://www.amazon.com/Behringer-AMP800-Four-Channel-Headph
> one/dp/B000KU87SM) at our CW position.  Lately, we have also been using a
> Rolls HA43 (http://www.rolls.com/product.php?pid=HA43) which is smaller
> and easier to operate.  Neither are bothered by stray RF.
>
> I have no vested interest in either.  There are similar products under
> various brand-names.  The Behringer can be had for around $70 and the Rolls
> for $50 from numerous online vendors.  The Behringer only accepts 1/4-inch
> phono plugs while the Rolls has dual input jacks to accept both 1/4-inch
> phono and 1/8th-inch plugs.  This is another reason I like the Rolls as no
> "tweenies" (adapters) are needed.
>
> Uses might include . . .
>
> A neophyte with an unconnected laptop, wearing his own headphones,
> entering call signs/exchanges into a practice logging program without
> disturbing the main operator.  Or the next shift warming-up before assuming
> the operator's position.  Or someone merely wanting to seriously listen for
> a while without being bothered by the inevitable traipsing in-and-out of
> visitors, kibitzers, the lost, the lonely, the huddled masses yearning to
> be free.
>
> Both of the above units accommodate up to four headphones.
>
> 73,
>
> Kent Trimble, K9ZTV
> Mid-MO Amateur Radio Club
> Jefferson City, MO
>
>
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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Mark Petiford via Elecraft]

RE:  "If you find one, let me know"

Walter,

There are portable aircraft intercoms available from aviation suppliers like 
Sporty's Pilot Shop, and possibly from Amazon, too.  They allow the passengers 
to talk to each other, and listen to the radio communications if they desire.   
The pilot can listen to only radio communications, or he can listen to the 
passenger chit-chat if he wants, with communications audio from the radio 
overriding that.  The pilot's mike goes to the radio for communications 
purposes if he pushes the PTT switch, or to the passengers chit-chat if he 
doesn't.

The biggest problem with these intercoms is that they are designed for carbon 
microphones and higher impedance headphones than we normally use.  I have seen 
circuits for converting stereo headphones and dynamic/electret microphones to 
work in aircraft, but not so much in the opposite direction.  That won't be a 
problem for the resourceful hams, but I suspect they won't work right out of 
the box.

Just a thought.

Mark
KE6BB
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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Bob McGraw K4TAX]

Just order you needs from Amazon today or tomorrow and have it by 
Friday.   I ordered my Koss SB 40 headset/mike on Friday and it was 
delivered Monday.  No expedited shipping either.


73

Bob, K4TAX


On 6/20/2017 6:05 PM, Clay Autery wrote:

Guessing there's a really good chance that we'll have one in 2018, too.
Just add the tip to your list for next year prep

Of course, you can likely get it to you from Amazon by Saturday...
Amazon Prime is awesome...

73,

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On 6/20/2017 4:31 PM, garyk9gs wrote:

All well and good..but FD is in 4 days.


73-Gary K9GS


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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Joe Subich, W4TV]

I believe there was a design for a device of that nature in a recent
(last 10 years) ARRL Handbook.  I don't have time to search the library
just now.

73,

   ... Joe, W4TV


On 6/20/2017 7:35 PM, Steve Sergeant wrote:

On 6/20/17 4:31 PM, Walter Underwood wrote:

If you find one, let me know. This could be useful for em-comm deployments.


On Jun 20, 2017, at 4:26 PM, Jack Brindle  wrote:
Does anyone make a distribution / intercom box that allows the two ops to talk 
between themselves without removing their headphones? One with a switch to 
select
one of the microphones to go to the rig might be an interesting box / project 
as well.


I designed a many-to-many audio router for the Behemoth [
http://www.computerhistory.org/revolution/mobile-computing/18/345/1703 ]
that would do what you're requesting. Alas I no longer have the design
files for the PC boards.
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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Steve Sergeant]

On 6/20/17 4:31 PM, Walter Underwood wrote:
> If you find one, let me know. This could be useful for em-comm deployments.
> 
>> On Jun 20, 2017, at 4:26 PM, Jack Brindle  wrote:
>> Does anyone make a distribution / intercom box that allows the two ops to 
>> talk between themselves without removing their headphones? One with a switch 
>> to select
>> one of the microphones to go to the rig might be an interesting box / 
>> project as well.

I designed a many-to-many audio router for the Behemoth [
http://www.computerhistory.org/revolution/mobile-computing/18/345/1703 ]
that would do what you're requesting. Alas I no longer have the design
files for the PC boards.
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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Walter Underwood]

If you find one, let me know. This could be useful for em-comm deployments.

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

> On Jun 20, 2017, at 4:26 PM, Jack Brindle  wrote:
> 
> Actually, thanks. I have been looking for something like this for a while, 
> and since they are available locally, it might be a good trip on my way to 
> the FD site.
> 
> Does anyone make a distribution / intercom box that allows the two ops to 
> talk between themselves without removing their headphones? One with a switch 
> to select
> one of the microphones to go to the rig might be an interesting box / project 
> as well.
> 
> - Jack, W6FB
> 
> 
>> On Jun 20, 2017, at 2:44 PM, Raymond Sills  wrote:
>> 
>> Those types of headphone distribution amps can often be found at music 
>> stores, like Guitar Center, Sam Ash, etc.  They might also have some compact 
>> amps with speakers, too.
>> 
>> 
>> 73 de Ray
>> K2ULR
>> KX3 #211
>> 
>> 
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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Jack Brindle]

Actually, thanks. I have been looking for something like this for a while, and 
since they are available locally, it might be a good trip on my way to the FD 
site.

Does anyone make a distribution / intercom box that allows the two ops to talk 
between themselves without removing their headphones? One with a switch to 
select
one of the microphones to go to the rig might be an interesting box / project 
as well.

- Jack, W6FB


> On Jun 20, 2017, at 2:44 PM, Raymond Sills  wrote:
> 
> Those types of headphone distribution amps can often be found at music 
> stores, like Guitar Center, Sam Ash, etc.  They might also have some compact 
> amps with speakers, too.
> 
> 
> 73 de Ray
> K2ULR
> KX3 #211
> 
> 
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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Clay Autery]

Guessing there's a really good chance that we'll have one in 2018, too. 
Just add the tip to your list for next year prep

Of course, you can likely get it to you from Amazon by Saturday... 
Amazon Prime is awesome...

73,

__
Clay Autery, KY5G

On 6/20/2017 4:31 PM, garyk9gs wrote:
> All well and good..but FD is in 4 days.
>
>
> 73-Gary K9GS 
>

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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Raymond Sills]

Those types of headphone distribution amps can often be found at music stores, 
like Guitar Center, Sam Ash, etc.  They might also have some compact amps with 
speakers, too.


73 de Ray
K2ULR
KX3 #211


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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Walter Underwood]

Your post talks about how handy it is to drive speakers and headphones. The K3 
can do that, but not all radios can. If you want speakers and headphones, you 
need more than a headphone distribution amp.

I wasn’t criticizing, just trying to help. The little DROK amp is quite handy.

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

> On Jun 20, 2017, at 2:18 PM, KENT TRIMBLE  wrote:
> 
> Walter . . .
> 
> That's why it's called a "headphone amplifier."
> 
> Kent
> 
> 
> 
> On 6/20/2017 4:10 PM, Walter Underwood wrote:
>> The Behringer can’t drive speakers
> 

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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[garyk9gs]

All well and good..but FD is in 4 days.


73-Gary K9GS 
 Original message From: KENT TRIMBLE  Date: 
6/20/17  3:55 PM  (GMT-06:00) To: Elecraft  Subject: 
[Elecraft] A VALUABLE FIELD DAY ACCESSORY 
Headphones and Field Day have been yoked since time immemorial.  The 
K3's ability to output its audio into both headphones and speakers 
simultaneously has been a boon to those FD sites that encourage 
visitors.  It permits the operator/logger to use headphones while 
visitors can monitor the action through speakers.  The problem lies in 
the volume levels that each of the participants require (or don't 
require).  This is especially true when multiple transceivers are 
occupying the same tent/trailer/room, etc., and each have their own 
group of listeners.  Cacophony is not the goal here.

As veteran Field-Day clubs have discovered over the years, a valuable 
accessory is a multi-outlet headphone-amplifier with individual volume 
controls for each headphone.  For several years we have used a Behringer 
Amp800 
(https://www.amazon.com/Behringer-AMP800-Four-Channel-Headphone/dp/B000KU87SM) 
at our CW position.  Lately, we have also been using a Rolls HA43 
(http://www.rolls.com/product.php?pid=HA43) which is smaller and easier 
to operate.  Neither are bothered by stray RF.

I have no vested interest in either.  There are similar products under 
various brand-names.  The Behringer can be had for around $70 and the 
Rolls for $50 from numerous online vendors.  The Behringer only accepts 
1/4-inch phono plugs while the Rolls has dual input jacks to accept both 
1/4-inch phono and 1/8th-inch plugs.  This is another reason I like the 
Rolls as no "tweenies" (adapters) are needed.

Uses might include . . .

A neophyte with an unconnected laptop, wearing his own headphones, 
entering call signs/exchanges into a practice logging program without 
disturbing the main operator.  Or the next shift warming-up before 
assuming the operator's position.  Or someone merely wanting to 
seriously listen for a while without being bothered by the inevitable 
traipsing in-and-out of visitors, kibitzers, the lost, the lonely, the 
huddled masses yearning to be free.

Both of the above units accommodate up to four headphones.

73,

Kent Trimble, K9ZTV
Mid-MO Amateur Radio Club
Jefferson City, MO


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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[KENT TRIMBLE]

Walter . . .

That's why it's called a "headphone amplifier."

Kent



On 6/20/2017 4:10 PM, Walter Underwood wrote:

The Behringer can’t drive speakers


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Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

[Walter Underwood]

The Behringer can’t drive speakers, it wants at least 47 Ohms and puts out 124 
mW per channel. If you want to power speakers, I recommend the $10 amp I use, 
it is 15 W per channel and runs from 12 V. The price varies, it is $8.50 today.

https://smile.amazon.com/DROK-Component-Amplifier-TDA7297-15W/dp/B00C4MT274/ 


I use it with my KX3. I have a simple splitter cable so the KX3 feeds my 
headphones and this amp.

https://observer.wunderwood.org/2017/03/04/speakers-for-my-elecraft-kx3/ 


Also, the Behringer HA400 is a 4-way headphone distribution amp for $25. 
Basically some op amps, volume controls, and jacks in a box. Other companies 
make pretty much the same thing for the same price.

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

> On Jun 20, 2017, at 1:55 PM, KENT TRIMBLE  wrote:
> 
> Headphones and Field Day have been yoked since time immemorial.  The K3's 
> ability to output its audio into both headphones and speakers simultaneously 
> has been a boon to those FD sites that encourage visitors.  It permits the 
> operator/logger to use headphones while visitors can monitor the action 
> through speakers.  The problem lies in the volume levels that each of the 
> participants require (or don't require).  This is especially true when 
> multiple transceivers are occupying the same tent/trailer/room, etc., and 
> each have their own group of listeners.  Cacophony is not the goal here.
> 
> As veteran Field-Day clubs have discovered over the years, a valuable 
> accessory is a multi-outlet headphone-amplifier with individual volume 
> controls for each headphone.  For several years we have used a Behringer 
> Amp800 
> (https://www.amazon.com/Behringer-AMP800-Four-Channel-Headphone/dp/B000KU87SM)
>  at our CW position.  Lately, we have also been using a Rolls HA43 
> (http://www.rolls.com/product.php?pid=HA43) which is smaller and easier to 
> operate.  Neither are bothered by stray RF.
> 
> I have no vested interest in either.  There are similar products under 
> various brand-names.  The Behringer can be had for around $70 and the Rolls 
> for $50 from numerous online vendors.  The Behringer only accepts 1/4-inch 
> phono plugs while the Rolls has dual input jacks to accept both 1/4-inch 
> phono and 1/8th-inch plugs.  This is another reason I like the Rolls as no 
> "tweenies" (adapters) are needed.
> 
> Uses might include . . .
> 
> A neophyte with an unconnected laptop, wearing his own headphones, entering 
> call signs/exchanges into a practice logging program without disturbing the 
> main operator.  Or the next shift warming-up before assuming the operator's 
> position.  Or someone merely wanting to seriously listen for a while without 
> being bothered by the inevitable traipsing in-and-out of visitors, kibitzers, 
> the lost, the lonely, the huddled masses yearning to be free.
> 
> Both of the above units accommodate up to four headphones.
> 
> 73,
> 
> Kent Trimble, K9ZTV
> Mid-MO Amateur Radio Club
> Jefferson City, MO
> 
> 
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[Elecraft] A VALUABLE FIELD DAY ACCESSORY

[KENT TRIMBLE]

Headphones and Field Day have been yoked since time immemorial.  The 
K3's ability to output its audio into both headphones and speakers 
simultaneously has been a boon to those FD sites that encourage 
visitors.  It permits the operator/logger to use headphones while 
visitors can monitor the action through speakers.  The problem lies in 
the volume levels that each of the participants require (or don't 
require).  This is especially true when multiple transceivers are 
occupying the same tent/trailer/room, etc., and each have their own 
group of listeners.  Cacophony is not the goal here.


As veteran Field-Day clubs have discovered over the years, a valuable 
accessory is a multi-outlet headphone-amplifier with individual volume 
controls for each headphone.  For several years we have used a Behringer 
Amp800 
(https://www.amazon.com/Behringer-AMP800-Four-Channel-Headphone/dp/B000KU87SM) 
at our CW position.  Lately, we have also been using a Rolls HA43 
(http://www.rolls.com/product.php?pid=HA43) which is smaller and easier 
to operate.  Neither are bothered by stray RF.


I have no vested interest in either.  There are similar products under 
various brand-names.  The Behringer can be had for around $70 and the 
Rolls for $50 from numerous online vendors.  The Behringer only accepts 
1/4-inch phono plugs while the Rolls has dual input jacks to accept both 
1/4-inch phono and 1/8th-inch plugs.  This is another reason I like the 
Rolls as no "tweenies" (adapters) are needed.


Uses might include . . .

A neophyte with an unconnected laptop, wearing his own headphones, 
entering call signs/exchanges into a practice logging program without 
disturbing the main operator.  Or the next shift warming-up before 
assuming the operator's position.  Or someone merely wanting to 
seriously listen for a while without being bothered by the inevitable 
traipsing in-and-out of visitors, kibitzers, the lost, the lonely, the 
huddled masses yearning to be free.


Both of the above units accommodate up to four headphones.

73,

Kent Trimble, K9ZTV
Mid-MO Amateur Radio Club
Jefferson City, MO


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