Re: [Elecraft] K3 External speakers

2020-09-04 Thread Brian Hunt
Set CONFIG:SPKRS=2. Same audio comes out of both external speakers. AFX makes 
some effects that can be less tiring. 

73,
Brian, K0DTJ



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Re: [Elecraft] K3 External speakers

2020-09-04 Thread Nr4c
Press the button marked AFX. Otherwise there is no audio on the right channel 
without the Sub-Rec. 

Sent from my iPhone
...nr4c. bill


> On Sep 4, 2020, at 10:08 AM, Tom Muller  wrote:
> 
> Searched the archive however can't find info for speakers set to 2 and no
> sub receiver. Yesterday I got audio from both speakers, and today only one
> side is working. I have the correct adaptor and speakers are 8 Ohms
> unamplified. Everything checks good on the bench. Could something be wrong
> in the radio or something I'm missing in set up? I've read the manual and
> Cady book a few times each and can't seem to figure this out. Suggestions
> or advise Thanks
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[Elecraft] K3 External speakers

2020-09-04 Thread Tom Muller
Searched the archive however can't find info for speakers set to 2 and no
sub receiver. Yesterday I got audio from both speakers, and today only one
side is working. I have the correct adaptor and speakers are 8 Ohms
unamplified. Everything checks good on the bench. Could something be wrong
in the radio or something I'm missing in set up? I've read the manual and
Cady book a few times each and can't seem to figure this out. Suggestions
or advise Thanks
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Re: [Elecraft] K3 External Speakers

2012-01-10 Thread W5RDW
Ditto on the West Mountain Radio COMspkr. Ordered a pair after reading
reviews here on the forum and after installation, it took about 5 seconds to
hear the difference over my computer speakers. My other speakers had RFI on
certain bands, but these have no RFI on all the HF bands with the KPA500
running 500 watts. I am extremely satisfied. They are nice looking and have
enough of a base area that they will not tip over easily unless actually
pushed over. I am pleased. BTW, they arrived within a week of ordering them
on-line.

Roger W5RDW

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[Elecraft] K3 External Speakers

2012-01-05 Thread John Dziedziejko
Thanks for all the responses, I have ordered the West Mountain ComSpkrs
since they were so highly recommended. I appreciated the comments and
suggestions.

Regards,

John W9QP


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Re: [Elecraft] K3 External Speakers

2012-01-05 Thread Jim Brown
On 1/5/2012 9:26 AM, Joe Subich, W4TV wrote:
> The odd thing is that the COMSpkr appears to be the same device as many
> of the generic computer speakers*except*  the bypass/RFI suppression
> parts included on the chip makers reference design are present in the
> West Mountain Radio product but are lacking in the commodity products.

Those working professionally in the field of EMC (that is, RFI 
interference) know that this sort of problem is QUITE widespread. In 
most manufacturing companies, there is an engineer whose job it is to 
try to remove as many parts as possible from every product so that it 
can be made more cheaply and still be sold. RFI suppression components 
almost always the first to go.  Open up a noisy product (if you can) and 
you'll find empty holes on  the board where those parts should be.  The 
only time those holes are every filled is when the prototype is 
submitted for EMC testing.

73, Jim Brown K9YC
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Re: [Elecraft] K3 External Speakers

2012-01-05 Thread Joe Subich, W4TV

> 99.9% of all powered speakers suffer from RFI, including those from
> pro audio companies. It's good to hear that these do not.

The odd thing is that the COMSpkr appears to be the same device as many
of the generic computer speakers *except* the bypass/RFI suppression
parts included on the chip makers reference design are present in the
West Mountain Radio product but are lacking in the commodity products.

I have "cleaned up" several of the generic ($20) speakers by adding the
necessary parts to the holes *already present* on the circuit board!

73,

... Joe, W4TV


On 1/5/2012 11:58 AM, Jim Brown wrote:
> On 1/5/2012 8:38 AM, Rose wrote:
>> FWIW, my West Mountain Radio COMspkr set totally free of interference.
>> The unit with the amp is immediately beside a 1KW amp and the antenna
>> cables for several rigs pass within inches behind the unit(s).
>
> What matters for RFI is proximity to ANTENNAS, not rigs, amplifiers, or
> even coax feedlines.
>
> 99.9% of all powered speakers suffer from RFI, including those from pro
> audio companies. It's good to hear that these do not.
>
> 73, Jim K9YC
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Re: [Elecraft] K3 External Speakers

2012-01-05 Thread Jim Brown
On 1/5/2012 8:38 AM, Rose wrote:
> FWIW, my West Mountain Radio COMspkr set totally free of interference.
> The unit with the amp is immediately beside a 1KW amp and the antenna
> cables for several rigs pass within inches behind the unit(s).

What matters for RFI is proximity to ANTENNAS, not rigs, amplifiers, or 
even coax feedlines.

99.9% of all powered speakers suffer from RFI, including those from pro 
audio companies. It's good to hear that these do not.

73, Jim K9YC
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Re: [Elecraft] K3 External Speakers

2012-01-05 Thread Phil Hystad
I also have the West Mountain Radio COMspkr and agree it is absolutely clear 
and free of interference.  If I turn on my external computer speakers (creature 
speakers hooked to my iMac) then I can hear a loud buzz whenever I key down 
from those creature speakers but absolutely nothing from the COMspkr.

Highly recommended -- and, they are just the right size to sit in front of you 
without taking up a lot of room.

73, phil, K7PEH


On Jan 5, 2012, at 8:38 AM, Rose wrote:

> John,
> 
> FWIW, my West Mountain Radio COMspkr set totally free of interference.
> The unit with the amp is immediately beside a 1KW amp and the antenna
> cables for several rigs pass within inches behind the unit(s).
> 
> 73! de Ken Kopp - K0PP
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[Elecraft] K3 External Speakers

2012-01-05 Thread Rose
John,

FWIW, my West Mountain Radio COMspkr set totally free of interference.
The unit with the amp is immediately beside a 1KW amp and the antenna
cables for several rigs pass within inches behind the unit(s).

73! de Ken Kopp - K0PP
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[Elecraft] K3 External Speakers

2012-01-05 Thread John Dziedziejko
I am thinking of purchasing the Bose Companion 2 Series II Multimedia
Speakers for my K3. Is anyone using them and how good do they work? Is there
any RF getting into the speakers?

My best to all.

Regards,

John W9QP


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Re: [Elecraft] K3 external speakers

2010-12-22 Thread David Cutter
>From memory, (ie the regs changed I should check first) over here in Eu we 
have working place regulation set at 85dBA as a maximum for continuous 8 
hours listening environment, but it is advised (not mandatory till another 
3dB) to use some kind of ear protection; then 88dBA for 4 hours, 91dBA for 2 
hours, etc and there is a maximum somewhere around 90s duration.   I think 
*most* folk would find 85dBA very tiresome over 8 hours.  I think what I'm 
saying is that the K3 output is more than adequate and if it isn't for 
someone, then headphones would be better so as not to waken the family / 
neighbourhood.
73 and season's greetings
David
G3UNA
>
> The loudspeaker output stages in the K3 are sufficient to drive an
> external passive (unamplified) loudspeaker of reasonable efficiency to a
> more than enough level for those who aren't seriously hearing impaired.
>   A number to look for in loudspeaker specs is 85dBSPL or more for 1
> watt at one meter into 8 ohms.  Most of us would set a loudspeaker
> within 20 inches or so, which increases the level by 6dB, and, as I
> recall, the K3 has a 1 watt output stage. That puts a peak loudness of
> 91 dB in our ear for CW, and about 10dB less for SSB.
>
> 73, Jim Brown K9YC 

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Re: [Elecraft] K3 external speakers

2010-12-21 Thread Sam Morgan
I use a pair of amplified Labtec computer speakers
with my K3's rear Stereo speaker output
I like the ability to either listen on headphones and speakers
or turn down the speakers and have a quieter room using the cans

although I did have some rfi initially
it was getting in from the little wall wart power supply for the speakers
a simple fix was 8-9 wraps of the power cord where it entered the speaker
around a small yellow toroid salvaged from a dead computer supply

later I upped my power to 400w with an AL-811
and and the rfi from the speakers was back
this time I did a 6 turn wrap
through one of the square snapon toroids
this was placed on the line coming from the K3 to the speaker input
at the end right next to where it entered the amplified speaker

all I'm saying is don't just throw out the idea of using
a set of cheap computer speakers you may have around the shack
it may be a really simple fix to get the going.


GB & 73
K5OAI
Sam Morgan

On 12/21/2010 6:24 PM, Jim Brown wrote:
> On 12/21/2010 10:11 AM, George A. Thornton wrote:
>> Amplified computer speakers have been a problem for me.  They are not
>> well screened for RF and on occasion I have had bad feedback problems.
>
> Yes, amplified loudspeakers (that is, speakers with built-in amplifiers)
> are notorious for serious RFI problems, thanks to poor shielding, poor
> circuit board layout, poor input filtering, and Pin One Problems.  I
> work in the world of pro audio, and take a VHF/UHF talkie with me to
> trade shows to test for RFI immunity in various products. Over a period
> of about ten years,  I've seen only a couple of RFI-proof loudspeakers,
> and they were in the $3K range. And I've seen lots of loudspeakers in
> that range (or even higher) with nasty RFI problems. :)
>
> The loudspeaker output stages in the K3 are sufficient to drive an
> external passive (unamplified) loudspeaker of reasonable efficiency to a
> more than enough level for those who aren't seriously hearing impaired.
> A number to look for in loudspeaker specs is 85dBSPL or more for 1
> watt at one meter into 8 ohms.  Most of us would set a loudspeaker
> within 20 inches or so, which increases the level by 6dB, and, as I
> recall, the K3 has a 1 watt output stage. That puts a peak loudness of
> 91 dB in our ear for CW, and about 10dB less for SSB.
>
> 73, Jim Brown K9YC
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Re: [Elecraft] K3 external speakers

2010-12-21 Thread Jim Brown
On 12/21/2010 10:11 AM, George A. Thornton wrote:
> Amplified computer speakers have been a problem for me.  They are not
> well screened for RF and on occasion I have had bad feedback problems.

Yes, amplified loudspeakers (that is, speakers with built-in amplifiers) 
are notorious for serious RFI problems, thanks to poor shielding, poor 
circuit board layout, poor input filtering, and Pin One Problems.  I 
work in the world of pro audio, and take a VHF/UHF talkie with me to 
trade shows to test for RFI immunity in various products. Over a period 
of about ten years,  I've seen only a couple of RFI-proof loudspeakers, 
and they were in the $3K range. And I've seen lots of loudspeakers in 
that range (or even higher) with nasty RFI problems. :)

The loudspeaker output stages in the K3 are sufficient to drive an 
external passive (unamplified) loudspeaker of reasonable efficiency to a 
more than enough level for those who aren't seriously hearing impaired. 
   A number to look for in loudspeaker specs is 85dBSPL or more for 1 
watt at one meter into 8 ohms.  Most of us would set a loudspeaker 
within 20 inches or so, which increases the level by 6dB, and, as I 
recall, the K3 has a 1 watt output stage. That puts a peak loudness of 
91 dB in our ear for CW, and about 10dB less for SSB.

73, Jim Brown K9YC
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Re: [Elecraft] K3 external speakers

2010-12-21 Thread George A. Thornton
Amplified computer speakers have been a problem for me.  They are not
well screened for RF and on occasion I have had bad feedback problems.
Eliminating the amplified speakers solved the feedback problem.
Unamplified speakers work fine and audio is adequate without external
amp with smaller efficient speakers.  



-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike Rodgers
Sent: Sunday, December 19, 2010 9:15 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 external speakers

Ok, one more question. I run some external equipment in the external
speaker line with a mono plug and a mono speaker. I should be able to
use that from k3 external speaker set to 2 with a stereo to mono adapter
right?

I also have a set of computer speakers I can run on line out. I wonder
if setting 
Line out=phon allows volume adjustment thru regular volume control (af
gain)

Do you see anything wrong (danger/hazard) with this?

Thanks. 

I saw it on the radio!

Happy QSO'ing.  Mike R


  
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[Elecraft] K3 external speakers

2010-12-19 Thread Mike Rodgers
Ok, one more question. I run some external equipment in the external speaker 
line with a mono plug and a mono speaker. I should be able to use that from k3 
external speaker set to 2 with a stereo to mono adapter right?

I also have a set of computer speakers I can run on line out. I wonder if 
setting 
Line out=phon allows volume adjustment thru regular volume control (af gain)

Do you see anything wrong (danger/hazard) with this?

Thanks. 

I saw it on the radio!

Happy QSO'ing.  Mike R


  
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Re: [Elecraft] [K3] External speakers

2009-12-22 Thread K4IA
I use the Sounds Sweet.  It has gotten a bit pricey but it has the  
advantage of cutting down on the high frequencies.  This helps the "noisy  
receiver" issues that occupied so much bandwidth over the past few days. 
(Please  do 
not take this as an invitation to beat that dead horse any more!)
 
Buck
k4ia 
K3#101
 
 
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[Elecraft] [K3] External speakers

2009-12-22 Thread Julian, G4ILO


Tom Hammond-2 wrote:
> 
> I personally prefer UNamplified Motorola Mobile speakers, available
> regularly
> on EBay for $10 or less.
> 
I have a pair of passive speakers that look very like those though they may
not be made by Motorola, but they are a bit lacking in bass for my liking
and I prefer the sound of the internal speaker.

I have a pair of cheap Trust computer speakers which sound good but I needed
to wind all the cables on ferrites to keep the RF out and still got some
breakthrough on some bands. And unfortunately they looked like cheap
computer speakers.

I ordered some Logitech speakers which were black and looked good next to
the K3 but it turned out they were so wide open to RFI they were picking up
a buzz from a nearby DECT cordless phone and I nearly had heart failure the
first time I pressed the PTT. The trouble with computer speakers is that
most of them are unshielded and there is usually no way to get inside them
to add bypass capacitors and filters except by using a hammer.

So I'm still looking for some smart, compact, RFI-proof speakers with decent
bass response, preferably passive (who needs another wall-wart) that I can
use with my K3. I don't have space for hi-fi bookshelf speakers.

-
Julian, G4ILO. K2 #392  K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html

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Re: [Elecraft] K3 external speakers

2009-04-06 Thread Ralph Tyrrell

I have had these Best Buy speaker since Dec 1, small and sound great.
Am very pleased with them
73, Ty, K3 696


--- On Sat, 4/4/09, Jay Rodaman  wrote:

> From: Jay Rodaman 
> Subject: Re: [Elecraft] K3 external speakers
> To: elecraft@mailman.qth.net
> Date: Saturday, April 4, 2009, 2:45 PM
> I have also had a similar need for external speakers.
> The recommendation from an "unnamed source (heh heh)
> " on the left coast
> was the following
> 
> 
> http://www.bestbuy.com/site/olspage.jsp?skuId=7314523&type=product&id=111884
> 3685964   
> 
> they are not very expensive , to the delete of most of us
> and seem to work quite well
> 
> Jay
>  
> 
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken
> Kopp
> Sent: Saturday, April 04, 2009 2:18 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] K3 external speakers
> 
> The following may well be obvious to most, but I know of
> at least three K3 owners who've been "caught"
> by plugging
> mono plugs into the (stereo) speaker jack.
> 
> There is a "gotcha" involved in the use of
> external speakers
> with the K3.  It's addressed indirectly on page 20 of
> the D2 
> version of the manual in the 2nd paragraph under PHONES
> when it reads "... if you use a stereo plug at the
> external 
> speaker jack  but is easily glossed over by the reader.
> 
> Many / most monaural external speakers have a MONAURAL
> plug on their cords.  DON'T plug one of these
> (monaural) plugs
> into the speaker jack.  It's configured for stereo and
> the sleeve 
> of the mono plug will short the ring portion of the stereo
> jack 
> and thereby short one channel of audio.  I ... along with
> several
> others ... have experienced a failure of the audio
> amplifier IC on 
> the front panel board due to one channel being shorted by
> the 
> sleeve of a monaural plug.  It seems to take many hours of 
> 
> operation under this condition to cause the IC to fail ...
> over a 
> year in mine and another's case.  The IC is -NOT- an
> easy change!  
> 
> Just remember that one audio channel is on the tip and the
> other 
> is on the ring of the plug and connect speakers in this
> manner 
> using -only- a stereo plug.  My particular "trap"
> was forgetting that 
> using a  stereo "Y" merely moved the
> "trap" six inches away from 
> the jack. (;-)
> 
> As others have pointed out, speakers from the two-radio
> field are 
> good choices, and the CB isle at truck stops usually sell
> nice 
> speakers.  Mine are Barjan 320-701's.  Radio Scrap
> 21-549B's 
> are OK, too.
> 
> 73! Ken Kopp - K0PP
>  elecraftcov...@rfwave.net
>  http://tinyurl.com/7lm3m5
> 
>  



  
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Re: [Elecraft] K3 external speakers

2009-04-04 Thread Ken Kopp
The AF Output mod had been made to (at least) two of  the 
K3's that suffered the audio output IC failure, mine included.

Perhaps the mod only "helps" and that's why the problem took 
months to come to failure.  My board is slightly scorched, and 
the IC "burned up" on another board.

The audio IC is robust, so I'm told, but can only stand so much 
for so long.  BTW, headphone audio still works after the output 
IC's failure.

Perhaps I'm not too smart, in that I had / have two speakers, so 
I chose "two speakers" from the menu. (;-).  Duh!

73! Ken  Kopp - K0PP
  elecraftcov...@rfwave.net
 
  
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Re: [Elecraft] K3 external speakers

2009-04-04 Thread Jay Rodaman
I guess to many times hitting the "delete" key...should have been "delight"

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jay Rodaman
Sent: Saturday, April 04, 2009 2:46 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 external speakers

I have also had a similar need for external speakers.
The recommendation from an "unnamed source (heh heh) " on the left coast
was the following


http://www.bestbuy.com/site/olspage.jsp?skuId=7314523&type=product&id=111884
3685964 

they are not very expensive , to the delete of most of us
and seem to work quite well

Jay
 


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp
Sent: Saturday, April 04, 2009 2:18 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 external speakers

The following may well be obvious to most, but I know of
at least three K3 owners who've been "caught" by plugging
mono plugs into the (stereo) speaker jack.

There is a "gotcha" involved in the use of external speakers
with the K3.  It's addressed indirectly on page 20 of the D2 
version of the manual in the 2nd paragraph under PHONES
when it reads "... if you use a stereo plug at the external 
speaker jack  but is easily glossed over by the reader.

Many / most monaural external speakers have a MONAURAL
plug on their cords.  DON'T plug one of these (monaural) plugs
into the speaker jack.  It's configured for stereo and the sleeve 
of the mono plug will short the ring portion of the stereo jack 
and thereby short one channel of audio.  I ... along with several
others ... have experienced a failure of the audio amplifier IC on 
the front panel board due to one channel being shorted by the 
sleeve of a monaural plug.  It seems to take many hours of  
operation under this condition to cause the IC to fail ... over a 
year in mine and another's case.  The IC is -NOT- an easy change!  

Just remember that one audio channel is on the tip and the other 
is on the ring of the plug and connect speakers in this manner 
using -only- a stereo plug.  My particular "trap" was forgetting that 
using a  stereo "Y" merely moved the "trap" six inches away from 
the jack. (;-)

As others have pointed out, speakers from the two-radio field are 
good choices, and the CB isle at truck stops usually sell nice 
speakers.  Mine are Barjan 320-701's.  Radio Scrap 21-549B's 
are OK, too.

73! Ken Kopp - K0PP
 elecraftcov...@rfwave.net
 http://tinyurl.com/7lm3m5

 
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Re: [Elecraft] K3 external speakers

2009-04-04 Thread Ken Wagner K3IU
There is a mod on the website to fix this problem. Check out the K3 
Enhancements and Application Notes page and look for K3 AF OutPut Mod 
Kit. A simple installation of 2 resistors.
73, Ken K3IU


W0MU Mike Fatchett wrote:
> I guess I will have to check my speakers.  This is a warning that should be
> in bold in the manual.
>
>  
>
>
> CC Packet Cluster W0MU-1
> W0MU.NET or  67.40.148.194
>
> "A slip of the foot you may soon recover, but a slip of the tongue you may
> never get over." Ben Franklin 
>
>
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp
> Sent: Saturday, April 04, 2009 12:18 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] K3 external speakers
>
> The following may well be obvious to most, but I know of at least three K3
> owners who've been "caught" by plugging mono plugs into the (stereo) speaker
> jack.
>
> There is a "gotcha" involved in the use of external speakers with the K3.
> It's addressed indirectly on page 20 of the D2 version of the manual in the
> 2nd paragraph under PHONES when it reads "... if you use a stereo plug at
> the external speaker jack  but is easily glossed over by the reader.
>
> Many / most monaural external speakers have a MONAURAL plug on their cords.
> DON'T plug one of these (monaural) plugs into the speaker jack.  It's
> configured for stereo and the sleeve of the mono plug will short the ring
> portion of the stereo jack and thereby short one channel of audio.  I ...
> along with several others ... have experienced a failure of the audio
> amplifier IC on the front panel board due to one channel being shorted by
> the sleeve of a monaural plug.  It seems to take many hours of operation
> under this condition to cause the IC to fail ... over a year in mine and
> another's case.  The IC is -NOT- an easy change!  
>
> Just remember that one audio channel is on the tip and the other is on the
> ring of the plug and connect speakers in this manner using -only- a stereo
> plug.  My particular "trap" was forgetting that using a  stereo "Y" merely
> moved the "trap" six inches away from the jack. (;-)
>
> As others have pointed out, speakers from the two-radio field are good
> choices, and the CB isle at truck stops usually sell nice speakers.  Mine
> are Barjan 320-701's.  Radio Scrap 21-549B's are OK, too.
>
> 73! Ken Kopp - K0PP
>  elecraftcov...@rfwave.net
>  http://tinyurl.com/7lm3m5
>
>  
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
>   
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Re: [Elecraft] K3 external speakers

2009-04-04 Thread Jay Rodaman
I have also had a similar need for external speakers.
The recommendation from an "unnamed source (heh heh) " on the left coast
was the following


http://www.bestbuy.com/site/olspage.jsp?skuId=7314523&type=product&id=111884
3685964 

they are not very expensive , to the delete of most of us
and seem to work quite well

Jay
 


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp
Sent: Saturday, April 04, 2009 2:18 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 external speakers

The following may well be obvious to most, but I know of
at least three K3 owners who've been "caught" by plugging
mono plugs into the (stereo) speaker jack.

There is a "gotcha" involved in the use of external speakers
with the K3.  It's addressed indirectly on page 20 of the D2 
version of the manual in the 2nd paragraph under PHONES
when it reads "... if you use a stereo plug at the external 
speaker jack  but is easily glossed over by the reader.

Many / most monaural external speakers have a MONAURAL
plug on their cords.  DON'T plug one of these (monaural) plugs
into the speaker jack.  It's configured for stereo and the sleeve 
of the mono plug will short the ring portion of the stereo jack 
and thereby short one channel of audio.  I ... along with several
others ... have experienced a failure of the audio amplifier IC on 
the front panel board due to one channel being shorted by the 
sleeve of a monaural plug.  It seems to take many hours of  
operation under this condition to cause the IC to fail ... over a 
year in mine and another's case.  The IC is -NOT- an easy change!  

Just remember that one audio channel is on the tip and the other 
is on the ring of the plug and connect speakers in this manner 
using -only- a stereo plug.  My particular "trap" was forgetting that 
using a  stereo "Y" merely moved the "trap" six inches away from 
the jack. (;-)

As others have pointed out, speakers from the two-radio field are 
good choices, and the CB isle at truck stops usually sell nice 
speakers.  Mine are Barjan 320-701's.  Radio Scrap 21-549B's 
are OK, too.

73! Ken Kopp - K0PP
 elecraftcov...@rfwave.net
 http://tinyurl.com/7lm3m5

 
__
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Re: [Elecraft] K3 external speakers

2009-04-04 Thread W0MU Mike Fatchett
I guess I will have to check my speakers.  This is a warning that should be
in bold in the manual.

 


CC Packet Cluster W0MU-1
W0MU.NET or  67.40.148.194

"A slip of the foot you may soon recover, but a slip of the tongue you may
never get over." Ben Franklin 



-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp
Sent: Saturday, April 04, 2009 12:18 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 external speakers

The following may well be obvious to most, but I know of at least three K3
owners who've been "caught" by plugging mono plugs into the (stereo) speaker
jack.

There is a "gotcha" involved in the use of external speakers with the K3.
It's addressed indirectly on page 20 of the D2 version of the manual in the
2nd paragraph under PHONES when it reads "... if you use a stereo plug at
the external speaker jack  but is easily glossed over by the reader.

Many / most monaural external speakers have a MONAURAL plug on their cords.
DON'T plug one of these (monaural) plugs into the speaker jack.  It's
configured for stereo and the sleeve of the mono plug will short the ring
portion of the stereo jack and thereby short one channel of audio.  I ...
along with several others ... have experienced a failure of the audio
amplifier IC on the front panel board due to one channel being shorted by
the sleeve of a monaural plug.  It seems to take many hours of operation
under this condition to cause the IC to fail ... over a year in mine and
another's case.  The IC is -NOT- an easy change!  

Just remember that one audio channel is on the tip and the other is on the
ring of the plug and connect speakers in this manner using -only- a stereo
plug.  My particular "trap" was forgetting that using a  stereo "Y" merely
moved the "trap" six inches away from the jack. (;-)

As others have pointed out, speakers from the two-radio field are good
choices, and the CB isle at truck stops usually sell nice speakers.  Mine
are Barjan 320-701's.  Radio Scrap 21-549B's are OK, too.

73! Ken Kopp - K0PP
 elecraftcov...@rfwave.net
 http://tinyurl.com/7lm3m5

 
__
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[Elecraft] K3 external speakers

2009-04-04 Thread Ken Kopp
The following may well be obvious to most, but I know of
at least three K3 owners who've been "caught" by plugging
mono plugs into the (stereo) speaker jack.

There is a "gotcha" involved in the use of external speakers
with the K3.  It's addressed indirectly on page 20 of the D2 
version of the manual in the 2nd paragraph under PHONES
when it reads "... if you use a stereo plug at the external 
speaker jack  but is easily glossed over by the reader.

Many / most monaural external speakers have a MONAURAL
plug on their cords.  DON'T plug one of these (monaural) plugs
into the speaker jack.  It's configured for stereo and the sleeve 
of the mono plug will short the ring portion of the stereo jack 
and thereby short one channel of audio.  I ... along with several
others ... have experienced a failure of the audio amplifier IC on 
the front panel board due to one channel being shorted by the 
sleeve of a monaural plug.  It seems to take many hours of  
operation under this condition to cause the IC to fail ... over a 
year in mine and another's case.  The IC is -NOT- an easy change!  

Just remember that one audio channel is on the tip and the other 
is on the ring of the plug and connect speakers in this manner 
using -only- a stereo plug.  My particular "trap" was forgetting that 
using a  stereo "Y" merely moved the "trap" six inches away from 
the jack. (;-)

As others have pointed out, speakers from the two-radio field are 
good choices, and the CB isle at truck stops usually sell nice 
speakers.  Mine are Barjan 320-701's.  Radio Scrap 21-549B's 
are OK, too.

73! Ken Kopp - K0PP
 elecraftcov...@rfwave.net
 http://tinyurl.com/7lm3m5

 
__
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[Elecraft] K3, external speakers and an HF amp.

2008-10-24 Thread Frankie Hunt
 
I guess I missed the word "active".  I was worried about the af amp in the
K3
 
 
 
(Note to self:  Re-read twice before responding to list)
 
Frankie
 
K3/10  1688
 
 
 
 
just plug it to external Speaker, enable 2 Speakers in the setup Menu



. but do not use an linear-hf-amplifier - the af-amp in the active

speakers is not hf protected







73



OE6KYG



KX1 244



K2 1331



K3 115
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[Elecraft] K3, external speakers and an HF amp.

2008-10-24 Thread Frankie Hunt
 
I use an external speaker on my K3.  (Sounds Sweet speaker switch between
radios via an iplus by W2IHY)
I don't us an amp with the K3 but I do use an amp with my other radios.
(Orion II, Omni VII, Jupiter)  
I do sometimes get a little RF into my small stereo speaker system of which
I use to listen to TV or to commercial FM music.
I do not see any other RF issues in my ham station.
 
 
Reading the response from OE6KYG it appears that I could stand the chance of
taking out the audio amp in my K3.
Is this correct???
 
 
Thanks,
Frankie
K4TEN
 
K3/10  1688
 
 
 
 
 
just plug it to external Speaker, enable 2 Speakers in the setup Menu

. but do not use an linear-hf-amplifier - the af-amp in the active
speakers is not hf protected



73

OE6KYG

KX1 244

K2 1331

K3 115
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[Elecraft] K3 - External Speakers

2008-03-27 Thread Phil & Debbie Salas
I just picked up a set of Cyber Acoustics amplified speakers (stereo) Model
CA-2012 at my local Fry's Electronics.  Cost was just $10.  These speakers
sound great, and look great set-up on either side of my K3.  There is even a
headphone jack on the right speaker, which also works great.  And no RFI
problems that I can find.  Anyway, highly recommended.

Phil - AD5X

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RE: [Elecraft] k3- external speakers

2007-11-27 Thread Larry Maguire
Lyle,

Thank you for the info. I'm about to order a Peavey Impulse II Monitor
Speaker for my Yaesu FT-920. The speaker specs out at 16 ohms. This will
work for the Yaesu, but I plan to switch this speaker to the K3...just
needed to know the range of the K3.

-Original Message-
From: Lyle Johnson [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, November 27, 2007 9:12 PM
To: Larry Maguire
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] k3- external speakers

> Does anyone know the impedance range of the external speakers for the K3? 

4 ohms to 16 ohms ought to work fine.  4 ohms will give you the loudest
audio since the amplifier is having to work directly from the 12V supply.

73,

Lyle KK7P

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Re: [Elecraft] k3- external speakers

2007-11-27 Thread Lyle Johnson
Does anyone know the impedance range of the external speakers for the K3? 


4 ohms to 16 ohms ought to work fine.  4 ohms will give you the loudest 
audio since the amplifier is having to work directly from the 12V supply.


73,

Lyle KK7P

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[Elecraft] k3- external speakers

2007-11-27 Thread Larry Maguire
Does anyone know the impedance range of the external speakers for the K3?  I
have looked and can't find it in the specs...no doubt I've overlooked
something that is obvious.
 
Larry
wd4mbe
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