I am sorry, but I must disagree with both Jim and Ray on this issue.
Current computer audio interfaces are a fine way to introduce
hams to digital modes and the only way to connect to an analog
radio, but they are not the way to go for best-of-breed digital
mode operation. As with CW and SSB,
On 4/19/2012 9:11 PM, Matt Murphy wrote:
How does one determine the ideal balance of line out volume, line in
sensitivity, sound card output volume, and sound card mic sensitivity?
I've written some stuff up, and will post it when I return from
Visalia. It's pretty easy.
73, Jim K9YC
Matt,
You take the levels one at a time. Set the K3 Line Out to 9 or 10, then
adjust your soundcard Line in slider so you have good printing on the
screen.
Then out the K3 in TX TEST - set the soundcard Line out (or volume)
slider to about 2/3 of the scale, then adjust the K2 Line in gain to
With a K3, the audio starts in digital form in the DSP.
Converting it to analog to convert it back to digital for input
to the computer can only introduce distortion.
I'm lobbying Elecraft for a direct digital interface. :-)
Cheers - Bill, AE6JV
On 4/18/12 at 21:54,
On 4/20/2012 9:36 AM, Bill Frantz wrote:
With a K3, the audio starts in digital form in the DSP.
Converting it to analog to convert it back to digital for input
to the computer can only introduce distortion.
I'm lobbying Elecraft for a direct digital interface.
Yes, but -- there is the issue
Plus... if the audio levels are properly set, the distortion levels
should be very low. Certainly, the distortions of the RF signal due
to propagation would be worse than the conversion distortions.
If you use the on-board method of sending RTTY or PSK31, you would
get the benefit of not
If you don't use some sort of external interface, how do you key the rig?
Just set up your software for DTR/RTS via the COM port if you have the
RS-232 cable connected?
Thanks and 73,
Ian
Ian Kahn, KM4IK
Roswell, GA EM74ua
km4ik@gmail.com
K3 #281, P3 #688
HRD v5.x/6.0 Test Team
On Thu,
On Thu, Apr 19, 2012 at 8:05 AM, Ian Kahn km4ik@gmail.com wrote:
...how do you key the rig? Just set up your software for DTR/RTS via the
COM port...
=
Yep, that's the way I do it. Works for digital, CW, and FSK. Don Wilhelm
points out that for digital modes including AFSK you
On 4/19/2012 12:54 AM, Jim Brown wrote:
Right, and I've long promoted that concept. BUT -- I've recently been
comparing several (five so far) outboard A/D converters, four models
that connect to the computer via USB, on that uses Firewire, and I've
found that all of them result in
On 4/19/2012 9:05 AM, Ian Kahn wrote:
If you don't use some sort of external interface, how do you key the
rig? Just set up your software for DTR/RTS via the COM port if you
have the RS-232 cable connected?
You can do that if your logging software allows it (in some cases the
digital software
When I first got my K3, I was adamant about using an interface, and FSK.
I've since changed my opinion.
The only drawback I see to using VOX for the digital modes is that since
they are SSB, VOX for phone is on, and I really dislike that, preferring
a foot switch. Wayne has promised it's on
On 4/19/2012 6:05 AM, Ian Kahn wrote:
If you don't use some sort of external interface, how do you key the
rig? Just set up your software for DTR/RTS via the COM port if you
have the RS-232 cable connected?
VOX
Jim
__
Elecraft
On 4/19/2012 7:30 AM, Mike wrote:
The only drawback I see to using VOX for the digital modes is that since
they are SSB, VOX for phone is on, and I really dislike that, preferring
a foot switch. Wayne has promised it's on the list.
There's a simple menu setting to disable the Mic Input and use
...how do you key the rig? Just set up your software for DTR/RTS via the
COM port...
Yep, that's the way I do it. Works for digital, CW, and FSK.
Some questions about keying the K3/KX3 for FSK:
1. Can someone post a schematic of what this (second) cable looks like
(connectors, wiring) for
KJ7AE wrote:
Some questions about keying the K3/KX3 for FSK:
Answers interspersed with your questions below.
Can someone post a schematic of what this (second) cable looks like
(connectors, wiring) for the K3?
http://www.aa5au.com/rttyinterface.html shows the circuit; what is not
shown
Rich - Thanks. The was really helpful.
Wayne - Could FSK control be added to ACC2 GPIO (like K3 ACC DIG0) and PTT
toggled via the microphone connector, thus both available simultaneously to
external RTTY software?
I'm new at this, so apologies if I've proposed something stupid...
/eric,
Jim wrote: *as long as you take reasonable care to get levels right*
How does one determine the ideal balance of line out volume, line in
sensitivity, sound card output volume, and sound card mic sensitivity?
73,
Matt NQ6N
On Thu, Apr 19, 2012 at 7:02 PM, erehm er...@earthlink.net wrote:
Rich
Thanks for the replies.
I will check out MMTTY. Is it good only for AFSK or does it also support FSK?
On FSK D the interface cable USB/RS232 that came with the K3 works very well
with the K3 Utility software.
Should I run the rig at reduced power like I do with PSK or is 100 watts oiu
OK?
MMTTY will do either FSK or AFSK, but in order to do FSK with MMTTY you
will need additional hardware, namely a keying circuit from a separate
serial port or USB-to-serial adapter (*not* the same serial port or
adapter you are using for radio control) connected to pin 1 of the K3's
ACC
It's worth pointing out that no interface is necessary with the K3. You
don't need a Signalink or Rigblaster or whatever. All interfacing can be
done with cables directly from K3 to PC. This simplest of hookups works
with all digital modes including JT65 and WSPR, and nothing else is
necessary to
On 4/18/2012 7:11 PM, Tony Estep wrote:
It's worth pointing out that no interface is necessary with the K3. You
don't need a Signalink or Rigblaster or whatever. All interfacing can be
done with cables directly from K3 to PC.
Right, and I've long promoted that concept. BUT -- I've recently
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