>> What are the headphone output impedances of the front panel and the rear
>> panel jacks and do they vary between modes?.
The LM4811 headphone amplifier provides maximum power transfer into a 16
ohm load (105 mW), and 70mW into a 32 ohm load. Ifas you increase th
eload impedance, the headpho
On Mon, 28 Jun 2010 17:07:51 -0400, Robert Kirkland wrote:
>We know that to obtain the maximum audio level between two devices we must
>match the impedances between them.
WRONG! Study my tutorial on audio for ham radio in
http://audiosytemsgroup.com/RFI-Ham.pdf
>What are the headphone output
Robert,
It is a misconception that audio devices must be impedance matched.
Audio transducers respond to voltage and current which equates to
power. Normally, audio output drivers are designed as low impedance
sources. That means that they will produce more power into a low
impedance load t
We know that to obtain the maximum audio level between two devices we must
match the impedances between them. The impedance of mono and stereo headsets
vary widely a good way to tell is if you have to rotate the volume control a
lot to get a small increase in volume there is a mismatch.The quest
>Jim said:
> Fifth, hams seem to confuse the setting of the
>front panel controls with how much audio the rig can put out.
Do you mean to tell me that I might be getting full audio output at 9
o clock ?
wow . ; )
I suppose that goes for my gutbuster car stereo as well..
(ps to
I see there is a new review on eham where he had low headphone audio.
John N1JM
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On Sun, 27 Jun 2010 12:52:47 -0400, Steve Ellington wrote:
>The K3's audio is just fine and there's plenty of it.
I agree. There are at least seven problems. First, Elecraft has a
design philosophy of minimizing current drain so that a rig works well
from batteries. That is a good thing, but it
> "I always run the speaker line out to a switching system, and I terminate
that line in a load safe for the radio. Then I bridge off that line with
either a good big speaker and audio amp, or headphones."
A while back, I found a used broadcast-quality 8 x 8 audio matrix switcher,
with built-in h
> From:
> To: "Steve Ellington" ;
> ; "Tom W8JI" ;
> ; "Elecraft"
> Sent: Sunday, June 27, 2010 12:19 PM
> Subject: Re: [Elecraft] Low headphone audio level
>
>
> > Steve,
> >
> > I have never found a radio with an internal s
rOf
course at 11:00 o'clock I do turn it down!
Steve
N4LQ
- Original Message -
From:
To: "Steve Ellington" ;
; "Tom W8JI" ;
; "Elecraft"
Sent: Sunday, June 27, 2010 12:19 PM
Subject: Re: [Elecraft] Low headphone audio level
> Steve,
>
>
To: Tom W8JI; ;
Subject: Re: [Elecraft] Low headphone audio level
As far as I'm concerned, all the audio is weak on the K3. Using the same
speaker, the little IC7000 blows the K3 off the desk. Maybe it's got
something to do with current drain. The Icom does use considerable more
power
My way around it is reasonably straightforward. I have a GAP (BHI Anem)
In-Line module on the speaker output. Besides having an excellent audio DSP
capability that I use routinely on SSB, it has a 5W audio amp and plenty of
gain to drive an external speaker to room filling volume levels.
Gran
t adequate
but just not very loud.
Steve
N4LQ
- Original Message -
From: "Tom W8JI"
To: ;
Sent: Sunday, June 27, 2010 9:16 AM
Subject: Re: [Elecraft] Low headphone audio level
>>> We sort of got sidetracked from the original posters remarks. It's about
>&g
>> We sort of got sidetracked from the original posters remarks. It's about
>> low
>> headphone level on the K3. If the level were a bit higher there would be
>> no
>> need to plug the headphones into the speaker jack. Similarly each pair of
>> headphones you grab seems to have a different level.
True on the sidetracking, but it seems to be a time honored tradition
here. :-)
The fone and speaker jacks on the back are separate.
My remarks were intended to offer an alternative to continually plugging
and unplugging stuff. Aside from the higher audio level at the rear
jack, plugging the mic
John Merrill wrote:
> I have a ProSet and it is fine at around 10 o'clock. I wonder if it an
> impedance thing?
Left most of my hearing on the other side of the planet one night nearly
a lifetime ago and I had the same problem, even with the menu set on HI.
I use the Heil from Elecraft and my
Hi Mike,
We sort of got sidetracked from the original posters remarks. It's about low
headphone level on the K3. If the level were a bit higher there would be no
need to plug the headphones into the speaker jack. Similarly each pair of
headphones you grab seems to have a different level. I have 3
I have the Yamaha CM5000 headset plugged into the rear panel, and toggle
the external speakers with a macro.
73, Mike NF4L
Mike K2MK wrote:
> Hi Pete,
>
> I have the same problem with the Heil Proset that I purchased from Elecraft.
> I also have a Sennheiser HD280 Pro which has a higher output b
You might consider plugging a stereo switchbox into the rear speaker jack
and plugging the speaker(s) and the headphones into the switchbox. I prefer
that because it's easier and involves no wear on the radio's jacks. I use
an old Radio Shack "Stereo Source Audio Selector (#42-2112). That one ha
Hi Pete,
I have the same problem with the Heil Proset that I purchased from Elecraft.
I also have a Sennheiser HD280 Pro which has a higher output but is not as
comfortable as the Proset.
I personally think the headphone AF output should be higher. (Yes I have the
config on HI). Admittedly my he
The answer is yes - TS-930 and Mark 5.
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000
On 6/25/2010 7:06 PM, N1JM
What maybe curious is that I bet Pete used that same headset on another ( JA)
radio with no problems.
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Judging from the various replies I have seen in the past, it would seem
that the drivers used in Heil headsets do vary.
Heil is very sparse with information about the amateur grade equipment,
other than pictures and good words. His Pro line is spec'ed better, I
guess those customers are not so
I wish Heil would put the headphone impedances on his website. He must supply
a wide variance in headphone impedances with his boom headsets, maybe
amongst the same models.
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Sent
On Fri, 25 Jun 2010 13:50:30 -0700, John Merrill wrote:
>I have a ProSet and it is fine at around 10 o'clock. I wonder if it an
>impedance thing?
It's a combination of impedance and sensitivity. Headphone output stages
are essentially constant voltage devices -- that is, they have a low
output
I have a ProSet and it is fine at around 10 o'clock. I wonder if it an
impedance thing?
On Fri, Jun 25, 2010 at 1:35 PM, Pete Smith wrote:
> It is already set on HI.
>
> 73, Pete N4ZR
>
> The World Contest Station Database, updated daily at
> www.conteststations.com
> The Reverse Beacon Network
Ah, I see - it also seems as if one side sometimes cuts in on the
headphones before the other, also contributing to the impression that
maybe the plug isn't in all the way.
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at h
And my AF gain is set to low.
On Fri, Jun 25, 2010 at 1:50 PM, John Merrill wrote:
> I have a ProSet and it is fine at around 10 o'clock. I wonder if it an
> impedance thing?
>
>
> On Fri, Jun 25, 2010 at 1:35 PM, Pete Smith wrote:
>
>> It is already set on HI.
>>
>> 73, Pete N4ZR
>>
>> The Wor
It is already set on HI.
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000
On 6/25/2010 4:04 PM, N1JM wrote:
> Have
Have you tried to change AF gain in the menu?
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__
Elecraft
> A tangentially related question - when I plug into the headphone jack,
> it appears that I have to push the phone plug into the jack quite firmly
> before the speak is cut off. Again, normal?
>
There is a delay of a second or so between when the headphones are
detected and the speaker am
ed!! Susan Meckley, Skipper W7KFI-mm AFA9SM USSV
DHARMA
--- On Fri, 6/25/10, Pete Smith wrote:
> From: Pete Smith
> Subject: [Elecraft] Low headphone audio level
> To: "Elecraft List"
> Date: Friday, June 25, 2010, 8:53 AM
> I have just gotten
I have just gotten around to trying headphones with my new K3, and am
surprised by how much audio gain is required for an adequate listening
level with my old Heil BN-10 (?) headset. I often find it at 2-3
o'clock. Is this normal? Output from the internal speaker seems normal
relative to the
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