Fred,
If set correctly, there's no difference. However, FSK is foolproof. It
can't be overdriven with excessive audio input resulting in excess bandwidth
and spurs. Some of it is historical, as in some older radios, narrow
filters cannot be used in AFSK mode.
Barry w2UP
--
View this message
FSK might not have excess bandwidth, but AFSK can have narrower bandwidth.
http://www.frontiernet.net/~aflowers/k3rtty/k3rtty.html#K3_AFSK_filter
On 3/24/2014 5:27 AM, Barry wrote:
Fred,
If set correctly, there's no difference. However, FSK is foolproof. It
can't be overdriven with
Well ... I'm not sure FSK is actually foolproof, based on the number
of posts to this list about problems getting FSK running using various
external interfaces. It is true that AFSK is Audio in/out and can
overdrive things, not easy in a K3 but certainly possible. Even cheap
sound cards
On 3/24/2014 5:30 PM, Fred Jensen wrote:
Even cheap sound cards deliver essentially pure sine wave audio,
Not quite. I've measured audio distortion at -30dB re: carrier for a
reasonably OK laptop sound card just below clip. That means you have
spurs only 30 dB below your signal. Not very
Wes (N7WS) wrote
No comparison. IMHO, wasted effort by Elecraft Engineering.
Wes N7WS
Not at all a wasted effort. I used to be an active RTTY DXer (RTTY DXCC
TOHR, all but BS7) and contester, but in my condo QTH, I just don't have the
room or desire for a rat's nest of cables to external
I have to agree with Barry. For a modest amount of code space (Flash
RAM), they added a very useful capability for the casual or field
operator. I once worked a DX RTTY station via FSK-D mode with paddle
keyboard. I could not have done that QSO any other way at that
time. The QSO was
Congratulations on your achievement; very impressive.
But what rat's nest of cables to external boxes? Sure you need a computer,
but who doesn't log using one these days? After that, it's two cables from the
Line In/Line Out of the radio to the same on the computer. Same number of
cables
Wes,
I'm not an AFSK fan, so it would be another COM port for FSK/PTT plus a box
with a couple of 2N's for the FSK and PTT lines. I'm satisfied with my
pre-programmed Mx buffers with callsign, 599, TU, etc. for the few RTTY QSOs
I make these days.
73,
Barry W2UP
P.S. I don't use a straight
Yes, the K3 certainly allows a multitude of modes, and within each mode,
several ways of doing it.
I'd really like to know ... no hidden aspersions here ... what the
difference is between direct FSK and AFSK. I use AFSK with two
RadioShack stereo cables between the laptop and the radio.
On 3/21/2014 9:05 AM, Wes (N7WS) wrote:
No comparison. IMHO, wasted effort by Elecraft Engineering.
My observations have been exactly thee opposite. I find that when I have
a RTTY signal carefully tuned in, the K3 decoder often beats MMTTY. The
carefully tuned part is critical, and I find
The P3 works really well for tuning RTTY signals for the K3 to
decode. Adjust the Span so you can easily see both frequencies
and lay the band on top of the waterfall.
Cheers - Bill, AE6JV (who would be in a world of hurt without
the P3)
On 3/21/14 at 11:07 PM, j...@audiosystemsgroup.com
Greetings,
I have played just a bit with the rtty via cw function of the K3 and am curious
if my casual observations match those of others. It appears that the K3 onboard
decoder takes a back seat in rtty decode ability to a radio/computer/mtty
combination. Agree/disagree/thoughts?
73,
Jim
No comparison. IMHO, wasted effort by Elecraft Engineering.
Wes N7WS
On 3/21/2014 8:45 AM, Jim Hoge wrote:
Greetings,
I have played just a bit with the rtty via cw function of the K3 and am curious
if my casual observations match those of others. It appears that the K3 onboard
decoder
But handy in a portable rig.
Phil -- Sent from my iPhone 5S
On Mar 21, 2014, at 9:05, Wes (N7WS) w...@triconet.org wrote:
No comparison. IMHO, wasted effort by Elecraft Engineering.
Wes N7WS
On 3/21/2014 8:45 AM, Jim Hoge wrote:
Greetings,
I have played just a bit with the rtty
I've found the K3 decode is adequate for casual contacts like W1AW/x when I
find them. Tuning is a bit touchy and the incoming signal needs to be strong.
Good for a quickie, though. I use the paddle for xmit.
73,
Brian, K0DTJ
I have played just a bit with the rtty via cw function of the K3
More like the rumble seat.
Dave, K2YG
Original message:
From: Jim Hogeknowk...@verizon.net
To: Elecraft Reflectorelecraft@mailman.qth.net
Subject: [Elecraft] K3 rtty decode vs: computer decode
I have played just a bit with the rtty via cw function of the K3 and am curious
if my casual
would feel the same way if I didn't have a P3. I find
the P3 an almost indispensable tuning indicator for the digital modes.
73,
Bill - NA5DX
Original message:
From: Jim Hogeknowk...@verizon.net
To: Elecraft Reflectorelecraft@mailman.qth.net
Subject: [Elecraft] K3 rtty decode vs: computer decode
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