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Speakers audio is gone

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Marcel Jorba

Speakers audio is gone

Hello

Since today, my K3 is not producing audio on the internal speaker or via an external speaker connected to the rear speaker socket
Audio is fine in my headest via the front or the rear connector

Time to time I can see HI CURR on the display. I must power off and on the eliminate it

Any idea?

Thanks

Marcel - EA3IN
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Mel

Re: Speakers audio is gone

Sounds like you have the same failure I do. Take the cover off and look for the DSP PCB and on the upper left side top is U1. Mine did not heat up or draw excessive current but was told that it might smoke smell bad and be hot to the touch. I think your U1 the audio amp is the culprit. I ordered the AF protection PCB assembly and a new IC from Elecraft. Not expensive but a bear to replace the SMD IC. Good luck

Mel, K6KBE

On Saturday, December 21, 2013 9:36 AM, Marcel Jorba <[hidden email]> wrote:

Hello

Since today, my K3 is not producing audio on the internal speaker or via an external speaker connected to the rear speaker socket
Audio is fine in my headest via the front or the rear connector

Time to time I can see HI CURR on the display. I must power off and on the eliminate it

Any idea?

Thanks

Marcel - EA3IN
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Ken G Kopp

Fwd: Speakers audio is gone

In reply to this post by Marcel Jorba

Hello Marcel,

Have you had a mono plug inserted into the speaker jack?

Even if you are just using one speaker, you -must- use a stereo
plug for the speaker/speakers.

The sleeve of a mono plug will short the audio IC and may
cause it to fail

73!

Ken - K0PP

On Sat, Dec 21, 2013 at 10:36 AM, Marcel Jorba <[hidden email]> wrote:

> Hello
>
> Since today, my K3 is not producing audio on the internal speaker or via
> an external speaker connected to the rear speaker socket
> Audio is fine in my headest via the front or the rear connector
>
> Time to time I can see HI CURR on the display. I must power off and on the
> eliminate it
>
> Any idea?
>
> Thanks
>
> Marcel - EA3IN
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Please help support this email list: http://www.qsl.net/donate.html
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Gary NL7Y

Re: Fwd: Speakers audio is gone

I have a Radio Shack P/N 274-0374 1/8" Mono Jack to 1/8 Stereo Plug Adapter stuck in the back of my K3. It feeds the mono plug to my ICOM SP 20.

No smoke so far, but I've wondered if the mono input side of the adapter still shorts the stereo output. Suppose I should test it and find out. I read somewhere that there was an internal K3 upgrade to potentially reduce the problem.

If it's an issue, maybe Elecraft should offer a preferred adapter? Of course I can always just solder up a stereo plug with the mono wiring.

73, Gary NL7Y

Don Wilhelm-4

Re: Fwd: Speakers audio is gone

Gary,

A stereo to mono adapter will usually not work. If you follow the
diagram for most of those adapters, the result will be the same as using
a mono plug - the ring will still be connected to the sleeve of the mono
plug.

The only real answer is to change the mono plug of your ICOM SP 20 to a
stereo plug with only the tip and the sleeve connected (No connection to
the ring).

73,
Don W3FPR

On 12/21/2013 8:49 PM, Gary NL7Y wrote:

> I have a Radio Shack P/N 274-0374 1/8" Mono Jack to 1/8 Stereo Plug Adapter
> stuck in the back of my K3. It feeds the mono plug to my ICOM SP 20.
>
> No smoke so far, but I've wondered if the mono input side of the adapter
> still shorts the stereo output. Suppose I should test it and find out. I
> read somewhere that there was an internal K3 upgrade to potentially reduce
> the problem.
>
> If it's an issue, maybe Elecraft should offer a preferred adapter? Of course
> I can always just solder up a stereo plug with the mono wiring.
>
> 73, Gary NL7Y
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Speakers-audio-is-gone-tp7581916p7581928.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
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Gary NL7Y

Re: Fwd: Speakers audio is gone

Hello Don and thanks for the info…that’s what I expected…a short from ring to sleeve. I have a 1/8 stereo plug to solder up to the SP 20 tomorrow per your suggestion. Somewhere I read that Elecraft had installed some bleeder resistors (or ?) to help delay the inevitable smoke from the audio amp.

As always thanks for your input. I left Elecraft four years to wander the desert looking for other rigs. My K3 review in E-Ham says it all. Glad I’m back. Soon 160 will return and my K3/P3 will be ready.

Merry Christmas/HNY to all

73, Gary NL7Y

Dave Hachadorian-2

Re: Speakers audio is gone

In reply to this post by Marcel Jorba

Marcel,

You have probably blown the speaker amplifier chip, U1 on the DSP
Board. Many of us have had the same problem. Elecraft has not
been able to determine the cause of the failures, so they have
not provided a solution.

The part is inexpensive, but is very difficult to replace because
the pins are very close together. If you know an excellent
soldering technician, maybe they could do it for you. Otherwise,
you have to send the radio, or just the DSP Board, for repair.

Dave Hachadorian, K6LL
Yuma, AZ

-----Original Message-----
From: Marcel Jorba
Sent: Saturday, December 21, 2013 10:36 AM
To: [hidden email]
Subject: [Elecraft] Speakers audio is gone

Hello

Since today, my K3 is not producing audio on the internal speaker
or via an external speaker connected to the rear speaker socket
Audio is fine in my headest via the front or the rear connector

Time to time I can see HI CURR on the display. I must power off
and on the eliminate it

Any idea?

Thanks

Marcel - EA3IN
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Gary NL7Y

Re: Fwd: Speakers audio is gone

In reply to this post by Don Wilhelm-4

Another mono/stereo speaker comment and question. Fred KE7X covers this topic well in his reference, as does Elecraft in their Owner's manual...to some extent.

Above noted earlier " I have a Radio Shack P/N 274-0374 1/8" Mono Jack to 1/8 Stereo Plug Adapter stuck in the back of my K3. It feeds the mono plug to my ICOM SP 20." That particular adapter shorts the tip (left speaker feed) and the ring (next up the plug; right speaker feed) when a monaural plug is inserted.

When OHM'd out the sleeve (third up the plug and metal body) sees 8 ohms between either the tip or ring when connected to the single monaural speaker (because they're shorted).

Question for those that better understand the Elecraft's audio wiring: Will shorting the left and right speaker channels cause harm when they see the same 8 ohm source?

73, Gary NL7Y

PS: Alternatively I can install a Radio Shack 274-375 dual mono to stereo adapter, or a simple stereo plug on my mono cord.

Don Wilhelm-4

Re: Fwd: Speakers audio is gone

Gary,

It seems that that is one adapter that 'does it right'. Many do not and
connect the ring of the stereo plug to the sleeve when a mono jack is
inserted, thus grounding the right channel. That is typical of the 1/8
inch to 1/4 inch adapters.

73,
Don W3FPR

On 12/22/2013 10:17 PM, Gary NL7Y wrote:

> Another mono/stereo speaker comment and question. Fred KE7X covers this topic
> well in his reference, as does Elecraft in their Owner's manual...to some
> extent.
>
> Above noted earlier " I have a Radio Shack P/N 274-0374 1/8" Mono Jack to
> 1/8 Stereo Plug Adapter stuck in the back of my K3. It feeds the mono plug
> to my ICOM SP 20." That particular adapter shorts the tip (left speaker
> feed) and the ring (next up the plug; right speaker feed) when a monaural
> plug is inserted.
>
> When OHM'd out the sleeve (third up the plug and metal body) sees 8 ohms
> between either the tip or ring when connected to the single monaural speaker
> (because they're shorted).
>
> Question for those that better understand the Elecraft's audio wiring: Will
> shorting the left and right speaker channels cause harm when they see the
> same 8 ohm source?
>
> 73, Gary NL7Y
>
> PS: Alternatively I can install a Radio Shack 274-375 dual mono to stereo
> adapter, or a simple stereo plug on my mono cord.
>
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Speakers-audio-is-gone-tp7581916p7581946.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
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> Please help support this email list: http://www.qsl.net/donate.html
>

Brian Campbell

K3 and WinTest CW setup

Could someone who is using WinTest to send CW on a K3 contact me off list please. I am not able to get Wintest to key up my K3 so I obviously have some ( or all ) of the settings wrong.

Thanks in advance

73
Brian
VE3MGY

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Brian Campbell

Re: K3 and WinTest CW setup

Just a quick update. I now can now QSY, change mode etc from the keyboard in Wintest so I know my computer is talking to my K3 through Wintest. Still can't get the K3 to TX CW from the keyboard / F1 F2... buttons however if anyone has any ideas. Thanks in advance.

73
Brian
VE3MGY

> From: [hidden email]
> To: [hidden email]
> Date: Mon, 23 Dec 2013 11:20:41 -0500
> Subject: [Elecraft] K3 and WinTest CW setup
>
> Could someone who is using WinTest to send CW on a K3 contact me off list please. I am not able to get Wintest to key up my K3 so I obviously have some ( or all ) of the settings wrong.
>
> Thanks in advance
>
> 73
> Brian
> VE3MGY
>
> ______________________________________________________________
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k6dgw

Re: K3 and WinTest CW setup

On 12/23/2013 9:42 AM, Brian Campbell wrote:
> Just a quick update. I now can now QSY, change mode etc from the
> keyboard in Wintest so I know my computer is talking to my K3 through
> Wintest. Still can't get the K3 to TX CW from the keyboard / F1 F2...
> buttons however if anyone has any ideas. Thanks in advance.

I use N1MM and have no experience setting up Wintest. However if you
are attempting to key the K3 on the serial CAT port, you need to do the
following:

1. Set Wintest to send CW on RTS

2. In the PTT-KEY menu on the K3 [TECH MD has to be ON], set it to put
CW on rtS.

You can also set up PTT on DTR if you want semi-QSK, I run full QSK and
don't use the PTT signal, and I key the K3 with a WinKeyUSB keyer. if
you're using an external keyer, Wintest will need to know the COM port
number of the keyer and to direct CW to that port.

Maybe you've already been through all this.

Merry Christmas,

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org

>
> 73 Brian VE3MGY
>
>> From: [hidden email] To: [hidden email] Date: Mon, 23
>> Dec 2013 11:20:41 -0500 Subject: [Elecraft] K3 and WinTest CW
>> setup
>>
>> Could someone who is using WinTest to send CW on a K3 contact me
>> off list please. I am not able to get Wintest to key up my K3 so I
>> obviously have some ( or all ) of the settings wrong.
>>
>> Thanks in advance
>>
>> 73 Brian VE3MGY
>> ______________________________________________________________
>> Elecraft mailing list Home:
>> http://mailman.qth.net/mailman/listinfo/elecraft Help:
>> http://mailman.qth.net/mmfaq.htm Post:
>> mailto:[hidden email]
>>
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>> email list: http://www.qsl.net/donate.html
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>
>
> ----- No virus found in this message. Checked by AVG - www.avg.com
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> 12/22/13
>
>

Richard Ferch

Re: K3 and WinTest CW setup

In reply to this post by Brian Campbell

Fred, as far as N1MM Logger is concerned you have DTR and RTS backwards.
N1MM Logger supports CW keying on DTR of a serial port but not on RTS,
whereas it supports PTT switching on either DTR or RTS.

If you want to use CW keying on the K3's radio control port, you would
configure N1MM Logger to use DTR on that port for CW, and set the K3's
CONFIG:PTT-KEY to OFF-DTR. If you also want to use that port for
hardware TX/RX switching, you would also configure N1MM Logger to use
RTS on the same port for PTT, and set the K3's CONFIG:PTT-KEY to RTS-DTR.

I don't know whether Wintest supports CW keying on the same serial port
that is used for radio control (not all software supports this
capability). If it does, the above configuration should work. If it does
not, you can connect a simple keying interface (transistor keying
circuit) between another serial port (or USB-to-serial adapter) and the
K3's Key In jack, again using DTR for CW, and RTS for PTT if desired,
and configure the software to use that second serial port for CW and/or
PTT. In this case you would set the K3's CONFIG:PTT-KEY to OFF-OFF, and
set DTR and RTS in the configuration for the radio control COM port to
Always Off.

For a more flexible and powerful solution, you can connect a K1EL
Winkeyer or WKUSB between the computer and the K3's Key In jack and
configure the software to use that. It will be on a different COM port
than the radio control port.

73,
Rich VE3KI

Fred Jensen wrote:

> I use N1MM and have no experience setting up Wintest. However if you
> are attempting to key the K3 on the serial CAT port, you need to do the
> following:
>
> 1. Set Wintest to send CW on RTS
>
> 2. In the PTT-KEY menu on the K3 [TECH MD has to be ON], set it to put
> CW on rtS.
>
> You can also set up PTT on DTR if you want semi-QSK, I run full QSK and
> don't use the PTT signal, and I key the K3 with a WinKeyUSB keyer. if
> you're using an external keyer, Wintest will need to know the COM port
> number of the keyer and to direct CW to that port.

k6dgw

Re: K3 and WinTest CW setup

On 12/23/2013 1:58 PM, Richard Ferch wrote:
> Fred, as far as N1MM Logger is concerned you have DTR and RTS backwards.
> N1MM Logger supports CW keying on DTR of a serial port but not on RTS,
> whereas it supports PTT switching on either DTR or RTS.

The odds that I'd get that wrong without checking were very close to
1.000 :-))
>
> If you want to use CW keying on the K3's radio control port, you would
> configure N1MM Logger to use DTR on that port for CW, and set the K3's
> CONFIG:PTT-KEY to OFF-DTR.

I used to let N1MM key the K3 on DTR and honestly, it worked fine nearly
100% of the time. Every now and then, unpredictable, Windoze would
decide it had some little task that was more important than running my
program and I'd get semi-CW at 130WPM for a second or so.

> For a more flexible and powerful solution, you can connect a K1EL
> Winkeyer or WKUSB between the computer and the K3's Key In jack and
> configure the software to use that.

That's what I finally did. Don't even have a paddle plugged into the WKUSB.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org

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Mel

Re: Fwd: Speakers audio is gone

In reply to this post by Don Wilhelm-4

Next rev of the DSP PCB should have the same series caps that all of the other audio output have!!!!!. Sized of course to the impedance, DUH.

Mel, K6KBE

On Sunday, December 22, 2013 11:14 PM, Don Wilhelm <[hidden email]> wrote:

Gary,

It seems that that is one adapter that 'does it right'. Many do not and
connect the ring of the stereo plug to the sleeve when a mono jack is
inserted, thus grounding the right channel. That is typical of the 1/8
inch to 1/4 inch adapters.

73,
Don W3FPR

On 12/22/2013 10:17 PM, Gary NL7Y wrote:

>

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Joe Subich, W4TV-4

Re: Fwd: Speakers audio is gone

The main board already has capacitors between the audio amplifier and
speaker switching on the KIO3 board. The capacitors - C2 and C3, 470
uF each - don't prevent accidental overload of the audio amplifier if
the output is shorted. With an impedance of less than 0 - j0.5 Ohms
at 1 KHz, they simply can't do the job.

The smart thing to do would be to replace L14 and L16 on the KIO3 Audio
IO Board with 1.2 Ohm to 2.2 Ohm resistors. Although 2.2 Ohms would
result roughly 2dB less maximum output (with 4 Ohm speakers), the
slight decrease would certainly be worthwhile to protect the audio
amplifier.

73,

... Joe, W4TV

On 12/23/2013 6:33 PM, Mel Farrer wrote:

> Next rev of the DSP PCB should have the same series caps that all of the other audio output have!!!!!. Sized of course to the impedance, DUH.
>
> Mel, K6KBE
>
>
>
>
>
> On Sunday, December 22, 2013 11:14 PM, Don Wilhelm <[hidden email]> wrote:
>
> Gary,
>
> It seems that that is one adapter that 'does it right'. Many do not and
> connect the ring of the stereo plug to the sleeve when a mono jack is
> inserted, thus grounding the right channel. That is typical of the 1/8
> inch to 1/4 inch adapters.
>
> 73,
> Don W3FPR
>
> On 12/22/2013 10:17 PM, Gary NL7Y wrote:
>> Another mono/stereo speaker comment and question. Fred KE7X covers this topic
>> well in his reference, as does Elecraft in their Owner's manual...to some
>> extent.
>>
>> Above noted earlier " I have a Radio Shack P/N 274-0374 1/8" Mono Jack to
>> 1/8 Stereo Plug Adapter stuck in the back of my K3. It feeds the mono plug
>> to my ICOM SP 20." That particular adapter shorts the tip (left speaker
>> feed) and the ring (next up the plug; right speaker feed) when a monaural
>> plug is inserted.
>>
>> When OHM'd out the sleeve (third up the plug and metal body) sees 8 ohms
>> between either the tip or ring when connected to the single monaural speaker
>> (because they're shorted).
>>
>> Question for those that better understand the Elecraft's audio wiring: Will
>> shorting the left and right speaker channels cause harm when they see the
>> same 8 ohm source?
>>
>> 73, Gary NL7Y
>>
>> PS: Alternatively I can install a Radio Shack 274-375 dual mono to stereo
>> adapter, or a simple stereo plug on my mono cord.
>>
>>
>>
>>
>> --
>> View this message in context: http://elecraft.365791.n2.nabble.com/Speakers-audio-is-gone-tp7581916p7581946.html
>> Sent from the Elecraft mailing list archive at Nabble.com.
>> ______________________________________________________________
>> 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
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Gary NL7Y

Re: Fwd: Speakers audio is gone

Enough drama already. For $1.99 I bought the recommended Radio Shack P/N 274-0375 1/8" dual mono jack to 1/8" stereo Y-adapter. Now I can op my stereo head set and play the current mono speaker w/o smoking the radio. It does fit the I/O board with everything next to it occupied.

I decided to go that route rather than making up a special purpose dual mono cable > stereo plug. I have a second receiver and plan stereo speakers. Now at will I can add a second unit and just plug it into the adapter.

Or, just run one in Contests, DX, or at Field Day for bystanders. Speakers + Phone = Yes and all work plus AFX. Press off on the speaker (IC SP 20) and it's headset only.

For the price of the adapter, it or similar should come with the radio and end this potential 'short and warning label' nonsense. Not everybody is like me and lives a mile from a parts supplier, and new owners may not be aware of the potential for damage until...

73, Gary NL7Y

Raymond Sills

Re: Fwd: Speakers audio is gone

Hi Gary:

On the Radio Shack website, it's now priced at 97 cents.... and that
means that it's being closed out. So, if someone needs that item, now
is the time to try to get it.

73 de Ray
K2ULR

On Dec 23, 2013, at 10:46 PM, Gary NL7Y wrote:

> Enough drama already. For $1.99 I bought the recommended Radio Shack
> P/N
> 274-0375 1/8" dual mono jack to 1/8" stereo Y-adapter. Now I can op my
> stereo head set and play the current mono speaker w/o smoking the
> radio. It
> does fit the I/O board with everything next to it occupied.

<snip>

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Gary NL7Y

Re: Fwd: Speakers audio is gone

This post was updated on .

Another product offering dual 1/8" mono to single 1/8" stereo. Search: Hosa YMM-261 Y adapter

73, Gary NL7Y

Brian Campbell

Re: K3 and WinTest CW setup Thank You!

In reply to this post by Brian Campbell

Thanks to all of the helpful emails I received l am now TX CW on my K3 from Win test. I did not realize how many different configurations people are using. I will be breaking both in this weekend in the RAC and Stew Perry.

Hope to work you all then.

Mx es HNY

73
Brian
VE3MGY

> From: [hidden email]
> To: [hidden email]
> Date: Mon, 23 Dec 2013 12:42:31 -0500
> Subject: Re: [Elecraft] K3 and WinTest CW setup
>
> Just a quick update. I now can now QSY, change mode etc from the keyboard in Wintest so I know my computer is talking to my K3 through Wintest. Still can't get the K3 to TX CW from the keyboard / F1 F2... buttons however if anyone has any ideas. Thanks in advance.
>
> 73
> Brian
> VE3MGY
>
> > From: [hidden email]
> > To: [hidden email]
> > Date: Mon, 23 Dec 2013 11:20:41 -0500
> > Subject: [Elecraft] K3 and WinTest CW setup
> >
> > Could someone who is using WinTest to send CW on a K3 contact me off list please. I am not able to get Wintest to key up my K3 so I obviously have some ( or all ) of the settings wrong.
> >
> > Thanks in advance
> >
> > 73
> > Brian
> > VE3MGY
> >
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