Hello Rik, It has been a long time since I read the official WSPR-15 protocol specification but your description sounds correct. I do remember it is 0.8 Hz bandwidth. Today I finally had time to inst
Hi Stefan, Rik, LF On LF or MF? In North America there is JT9 activity every night on MF. There has been some on LF and time to time even some station calling CQ but we do not have enough active stat
Hi Rik, all, That brings up some interesting possibilities! If SlowJT9 could decode all three modes simultaneously, then we could have some "beacon" stations alternately transmitting JT9-1, JT9-2, an
Hi Rik, all, I let SlowJT9 monitor MF JT9-2 until 0030z. Having not seen any JT9-2 signals I then changed the mode to JT9-1 to see if it was working. Right away I started getting the expected decodes
I'm sorry about the QRM Jay. It works both ways as some stations have difficulty decoding the weaker WSPR stations when North American stations are running EbNaut close by. Judging by WSPR spots cond
I decoded 4 stations on JT9-2 last night: KU4XR, N2END, WB4JWM, K5DNL. KU4XR was visible many times on the waterfall without decodes but he did have drift varying from 3 Hz / period to 8 Hz / period.
Hello Rik, v0.9.02 installed and monitoring 630m JT9-2 here. Yes of course. The drift I measured was the actual RF drift of the signal, measured visually with a high resolution waterfall external to
Eric brings up a good point. Forget what I said the other day about beaconing with a U3S to be received by SlowJT9. I believe that won't work because the U3S uses the original JT9-2, -5, -10, -30 sym
Stefan, Markus, If you want to stay on 137.465 let me know... I can shut my transmitter off for the night. Sorry I didn't think to do that last night. I thought I was far enough away (in kilometers)
Hi Stefan, OK but keep it in mind for the future. I understand we have only 2.1 kHz to play in and we have to share the resource. The DL0AO decodes were 0544 and 0550z so I think you were not transmi
I can confirm something similar. My CPU is running around 30% (it's a VERY busy system with many apps running). When SlowJT9 invokes the decoder I see a short spike to 50%, sometimes as high as 55%.
We're having a good test tonight so far. I've decoded 4 stations on JT9-2 with reported SNR down to -30. It has been a long day with the bad knee. I'm going to bed and let the receiver run overnight.
Hi Rik, all, I am still thinking about this. :) I can see some advantages both ways. If we assume that there will be significant non-scheduled activity (people calling CQ using more than one of the J
Below is my list of JT9-2 decodes from last night. I think we had a good amount of participation in the test. The only concern I have is that there were very few decodes below -27 or "standard JT9" l
Mike, It was a copy and paste from the app screen. When I pasted it into the body of the email it didn't have the extra space between lines. When it showed up from the list servers it did. I'm not su
Thanks Jay, That sounds like a very good approach. I will see if I can find someone within daytime range who has accurate power control and is interested in doing that. It is not easy for me to adjus
Hi Stefan, I would very much welcome the chance to see you on my grabber and / or try to decode you on JT9-5. If you try either one I will leave my TX off. Unfortunately I am not able to decode EbNau
I am looking for a better method to transmit DFCW for 2200 meter QSOs. For my QSO with 2E0ILY I used a QRP Labs U3S for the transmitter. This worked very well for DFCW60 when I was transmitting every
Hello Rik, all, Hmm. That seems significant. Selfishly, if using the original specification makes SlowJT9 decoding compatible with transmissions from devices such as the U3S I would prefer that. But
