Hi Ron,
I just ordered my K3 on Thursday. Do you know if this modification has
already been phased in to new kits?
73,
James KC2UEE
Ron D'Eau Claire wrote:
Hello David:
Wayne asked me to reply since I prepared the application note. Only two
resistors are needed, so if you've done the
According to the Enhancements and App Notes page at:
http://www.elecraft.com/K3/k3_app_notes.htm
This modification is needed for all K3s shipped approximately before
01/12/09 containing either a Revision XB or Revision A KIO3
board.
Bob NW8L
On Sat, Feb 14, 2009 at 5:41 PM, KC2UEE
in the
document.
Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob Cunnings
Sent: Saturday, February 14, 2009 5:09 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Caution when using an external monaural speaker
David Pratt-4 wrote:
In a recent message, wayne burdick n...@elecraft.com wrote ...
The short version is: put 1/8-W (or larger), 470-ohm resistors from
each speaker output to ground. (The actual value isn't critical;
anything from 330 to 1000 ohms would probably work just as well.) This
In a recent message, Ron D'Eau Claire r...@cobi.biz wrote ...
The version shown in the app note mimics what Aptos is doing as they modify
the boards in inventory. The resistors are in the same place electrically,
but they chose to put them on the main KIO3 board instead.
Thank you, Ron, for your
In a recent message, David Pratt da...@g4dmp.fsnet.co.uk wrote ...
Thank you, Ron, for your explanation. I have carried out the mod as in
the App note. I was particularly puzzled by the resistor across pins 29
(TXD) 35 of P76 which appears to put the resistor between pin 14 of U1
and ground. I
In a recent message, wayne burdick n...@elecraft.com wrote ...
The short version is: put 1/8-W (or larger), 470-ohm resistors from
each speaker output to ground. (The actual value isn't critical;
anything from 330 to 1000 ohms would probably work just as well.) This
can be done conveniently on
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Pratt
Sent: Wednesday, January 14, 2009 1:10 PM
To: wayne burdick
Cc: Elecraft List
Subject: Re: [Elecraft] K3 Caution when using an external monaural speaker
In a recent message, wayne burdick
Notice that the app note (rev A) for this has an error. Figure 4 legend
reads Installing the 470K Ohm resistors Should read ... 470 Ohm
resistors.
-Bruce N1RX
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: Re: [Elecraft] K3 Caution when using an external monaural speaker
Notice that the app note (rev A) for this has an error. Figure 4 legend
reads Installing the 470K Ohm resistors Should read ... 470 Ohm
resistors.
-Bruce N1RX
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Most of the K3 owners probably already know this but for the benefit of
those that don't please be aware that you may damage the audio amplifier
chip on the DSP board if you enable Config Speaker 2 and then plug a
monaural speaker plug into the rear panel speaker jack. This overloads the
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