My pick is the RadioShack Optimus 8 or 11. I believe these are long out of
production but widely available used on the Internet. I also second N4LQ's
recommendation on the MFJ ClearTone for CW.
I think the audio "fullness" of the existing K3 speaker could be
substantially improved with the simple addition of a baffle. A few weeks
ago, I looked at this and there appears to be just enough room to form a
sealed square box around the speaker to form an "infinite baffle."
The problem with 99% of the existing communications speakers is that the
path from the back-wave of the speaker is far too short and results in
low-frequency cancellation. The baffle prevents back-wave and forward-wave
cancellation. The result is substantially improved low-end content below
400 Hz.
Paul, W9AC
----- Original Message -----
From: "wayne burdick" <[EMAIL PROTECTED]>
To: "Bruce Osterberg" <[EMAIL PROTECTED]>
Cc: "Elecraft Reflector" <[email protected]>
Sent: Saturday, May 03, 2008 11:43 PM
Subject: [Elecraft] Re: Perfect K3 Speaker
Hi Bruce,
For communications bandwidths, a sturdy 4-ohm, 3 or 4" diameter mobile
speaker (non-powered) does a great job. For a bit more fidelity and to
take advantage of the K3's stereo speaker outputs, I use a pair of good
quality bookshelf-style speakers (again, non-powered).
Right now I'm using Best Buy's "Insignia, 4-inch, 3-way surround
speakers," which sound quite good, although they're 8 ohms rather than 4
so the available per-channel peak power will be lower. They're about 4"W x
8"H.
I had been using just a single speaker, but having two allows me to get
L/R separation of the main and subreceivers, as well as take advantage of
the K3's "AFX" simulated stereo mode.
73,
Wayne
N6KR
On May 3, 2008, at 7:05 PM, Bruce Osterberg wrote:
Good Evening:
If I was to add an external speaker to the K3 what would it be, looking
for suggestions as Dayton is just around the corner.
73 Bruce N9BX
K3 # 775
---
http://www.elecraft.com
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