On 2020-03-21 10:23 AM, Jim Rhodes wrote:
My only conclusion is that there is some logic in the K3 or the new
USB interface that is not routing the audio properly in AFSK mode.
If one look at the schematic fr the KIO3B there is *no difference*
between the KIO3B USB audio and the original KIO3 with an external
soundcard. The sound card output is routed through the normally
closed connections of the Line In jack.
The *only way* one can have transmit with DATA_A and no output in
AFSK_A is if the user has CONFIG:AFSK TX = FIL ON and the RTTY
program's MARK tone does not match the MARK tone set in "PITCH".
The easy way to confirm this issue is simply set CONFIG:AFSK TX =
FIL OFF.
Issues of VOX are a red herring ... one can use software command
for PTT (TX; / RX; in MMTTY) or the DTR line on the CAT port
CONFIG:PTT-KEY = DTR-off (both of which can be supported by MMTTY,
and N1MM+).
73,
... Joe, W4TV
On 2020-03-21 10:23 AM, Jim Rhodes wrote:
OK, I set things back up with AFSK for RTTY instead of FSK. My results were
the same as Joe's. If I set data mode to DATA A things work as expected
whether using VOX or my usual interface for PTT. However when I switch data
mode to AFSK and VOX on and hit the TX button nothing happens, if I plug in
the FSK interface just for PTT the K3 goes into transmit but there is no
output and no tones in the monitor. My only conclusion is that there is
some logic in the K3 or the new USB interface that is not routing the audio
properly in AFSK mode. This is apparently not the case with the K3S. So
Joe there is your answer. It is not your setup it is the radio. Maybe when
the K4 is all rolled out they can take a look at the firmware and come up
with a solution. My current FSK interface is 2 transistors and 2 resistors
in each of 2 db9s connected in parallel to the db15hd pins for PTT & FSK.
This allows for SO2V operation with minimal fuss. I have never owned a
commercial interface, so have no experience with them.
On Sat, Mar 21, 2020 at 6:26 AM n9ok <[email protected]> wrote:
Thanks to all who've provided suggestions.
I've given up on making ASFK-A work with RTTY and am going back to FSK.
It's
a more complex setup, but it works. The engineer part of me is pretty
irritated about this. I don't like giving up on problems. However, I think
I've done everything I can on this end and I have better things to do than
to stress about this.
73 Joe N9OK
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