Elecraft

Speaker problem

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Tom Zeltwanger

Speaker problem

Just got K2 5848 complete. Everything looks good except the speakers (int or
ext) do not work. Headphones work great. I double-checked the wiring, and I have
not reversed the speaker wires.

When I removed the speaker connector, I noticed that there is only about 0.12
volts at P5 (audio) connector on the control board, whether I have the headphone
plugged-in or not, and regardless of volume setting. Makes me think I have a bad
headphone jack switch. I have heard about these going bad. Is is common to see
bad ones from the factory? Or should I be looking for something else?

Thanks and 73,

Tom KG3V

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Gregg R. Lengling

RE: Speaker problem

See the K2 manual errata on the manual pages that was just updated...there
was a change in the jack wiring as the jack has changed apparently.

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Tom Zeltwanger
Sent: Saturday, February 17, 2007 4:01 PM
To: [hidden email]
Subject: [Elecraft] Speaker problem

Just got K2 5848 complete. Everything looks good except the speakers (int or
ext) do not work. Headphones work great. I double-checked the wiring, and I
have
not reversed the speaker wires.

When I removed the speaker connector, I noticed that there is only about
0.12
volts at P5 (audio) connector on the control board, whether I have the
headphone
plugged-in or not, and regardless of volume setting. Makes me think I have a
bad
headphone jack switch. I have heard about these going bad. Is is common to
see
bad ones from the factory? Or should I be looking for something else?

Thanks and 73,

Tom KG3V

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dave.wilburn

Re: Speaker problem

In reply to this post by Tom Zeltwanger

Copy of builders alert message.

We have a new Builder Alert, covering the wiring of the new type (RoHS
compliant) of K2 speaker jack.

Read about it on our website at:

http://www.elecraft.com/Apps/Builder's%20Alert%20New%20K2%20Speaker%20Jack%20Rev%20A.pdf

This Alert applies to K2 kits purchased since August, 2006. If you have
found that your external speaker doesn't work, please read this Alert.
No parts need to be replaced, just some very minor rewiring work needs
to be done to the external speaker jack. This change is not covered in
the manual, but is in the new Errata (Rev F-10) also available on our
website in the "Manuals and Downloads" section.

End copy

David Wilburn
[hidden email]

Tom Zeltwanger wrote:

> Just got K2 5848 complete. Everything looks good except the speakers (int or
> ext) do not work. Headphones work great. I double-checked the wiring, and I have
> not reversed the speaker wires.
>
> When I removed the speaker connector, I noticed that there is only about 0.12
> volts at P5 (audio) connector on the control board, whether I have the headphone
> plugged-in or not, and regardless of volume setting. Makes me think I have a bad
> headphone jack switch. I have heard about these going bad. Is is common to see
> bad ones from the factory? Or should I be looking for something else?
>
> Thanks and 73,
>
> Tom KG3V
>
>
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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Don Wilhelm-3

RE: Speaker problem

In reply to this post by Tom Zeltwanger

Tom,

If you are plugging the speaker into P5 on the CONTROL BOARD, it will NOT
work there.
Plug it into P5 on the RF Board and see what happens. If it still does not
work, you may have wired the external speaker jack incorrectly - it was
recently change (new ones have a hex nut) and the manual is no longer
correct - check th eBuilder's alert on the Elecraft website.

73,
Don W3FPR

> -----Original Message-----
>
> Just got K2 5848 complete. Everything looks good except the
> speakers (int or
> ext) do not work. Headphones work great. I double-checked the
> wiring, and I have
> not reversed the speaker wires.
>
> When I removed the speaker connector, I noticed that there is
> only about 0.12
> volts at P5 (audio) connector on the control board, whether I
> have the headphone
> plugged-in or not, and regardless of volume setting. Makes me
> think I have a bad
> headphone jack switch. I have heard about these going bad. Is is
> common to see
> bad ones from the factory? Or should I be looking for something else?
>
> Thanks and 73,
>
> Tom KG3V
>

--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.441 / Virus Database: 268.18.1/690 - Release Date: 2/16/2007
2:25 PM

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Ron D'Eau Claire-2

RE: Speaker problem

Miswiring the external speaker jack should not keep the speaker from
working, unless you reverse the copper (hot) and silver (ground) wires. The
new speaker jack reversed the position of the hot connections so if it was
wired according to the original illustration in the manual, there'd be no
audio output from the jack if an external speaker was plugged in. That's
because with the hot leads reversed, the tip of the external plug ends up
connected to the speaker in the K2 instead of the hot lead from the RF
board. But, with nothing in the jack the speaker would get normal audio.

Don's suggestion about possibly plugging it into the wrong place sounds
likely. The other thing is to make sure you inserted the leads into the plug
correctly. That silver/copper polarity assumes you inserted the leads into
the plug that goes to the RF board in the correct positions as shown in
Figure 7-3 (page 79 in the manual).

Ron AC7AC

> -----Original Message-----
>
> Just got K2 5848 complete. Everything looks good except the speakers
> (int or
> ext) do not work. Headphones work great. I double-checked the wiring,
> and I have not reversed the speaker wires.
>
> When I removed the speaker connector, I noticed that there is only
> about 0.12 volts at P5 (audio) connector on the control board, whether
> I have the headphone
> plugged-in or not, and regardless of volume setting. Makes me
> think I have a bad
> headphone jack switch. I have heard about these going bad. Is is
> common to see
> bad ones from the factory? Or should I be looking for something else?
>
> Thanks and 73,
>
> Tom KG3V
>

Tom Zeltwanger

RE: Speaker problem

In reply to this post by Don Wilhelm-3

Don,

You hit it on the head, as usual. When I plug the speaker connector into the
RIGHT connector, it works. Thought I read the directions and never imagined two
2-pin P5 connector in a small area. So I plugged in to the Control board!

First try to use an external speaker did not work, and I guess that may be
related to the speaker jack wiring. I will check out the errata for that, but it
can wait till I am installing the KPA-100 I just started.

Thanks all for the help. K2 #5848 is now on the air, and working like a charm so
far.

73,

Tom KG3V

Quoting Don Wilhelm <[hidden email]>:

> Tom,
>
> If you are plugging the speaker into P5 on the CONTROL BOARD, it will NOT
> work there.
> Plug it into P5 on the RF Board and see what happens. If it still does not
> work, you may have wired the external speaker jack incorrectly - it was
> recently change (new ones have a hex nut) and the manual is no longer
> correct - check th eBuilder's alert on the Elecraft website.
>
> 73,
> Don W3FPR
>
> > -----Original Message-----
> >
> > Just got K2 5848 complete. Everything looks good except the
> > speakers (int or
> > ext) do not work. Headphones work great. I double-checked the
> > wiring, and I have
> > not reversed the speaker wires.
> >
> > When I removed the speaker connector, I noticed that there is
> > only about 0.12
> > volts at P5 (audio) connector on the control board, whether I
> > have the headphone
> > plugged-in or not, and regardless of volume setting. Makes me
> > think I have a bad
> > headphone jack switch. I have heard about these going bad. Is is
> > common to see
> > bad ones from the factory? Or should I be looking for something else?
> >
> > Thanks and 73,
> >
> > Tom KG3V
> >
> --
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.5.441 / Virus Database: 268.18.1/690 - Release Date: 2/16/2007
> 2:25 PM
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
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>
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> Elecraft web page: http://www.elecraft.com
>