JT9 - WOW! Very sensitive indeed!

Discussion in 'Working Different Modes' started by W7UUU, Aug 18, 2014.

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  1. KJ3N

    KJ3N Ham Member QRZ Page

    I'll get to JT9 when I feel I'm finished with JT65. :D

    on7gb-160m.jpg

    I don't think I'm quite done yet....

    vk3xq.jpg
     
  2. K4VLF

    K4VLF Ham Member QRZ Page

    Need JT9 software help (WSJT-X ).

    Can't seem to get the decoder to kick in, on RX signals. Waterfall looks fine. Worked for a bit and then stopped. Maybe what I see on the WF is not JT9 ??

    Who call spare 10 minutes on the phone later today?

    Dave
     
  3. N2ADV

    N2ADV XML Subscriber QRZ Page

    Make sure the blue line is to the left of the JT9 signals (mine is currently set at "JT65 2700 JT9"). If you have the " +2kHz" box checked set the blue line to 500 or so so it reads "JT65 500 JT9"
     
  4. W7UUU

    W7UUU Principal Moderator Lifetime Member 133 Administrator Volunteer Moderator Platinum Subscriber Life Member QRZ Page

    Thanks Jim! I was wondering the same thing.

    Dave
    W7UUU
     
  5. N2ADV

    N2ADV XML Subscriber QRZ Page

    Most welcome. I am probably going to be switching over to JT9 only because of all the crap I am encountering on JT65 as of late (people jumping in on QSO's in progress, people calling CQ on top of other stations when the are sending to PSKReporter that they are decoding the stations they are stepping on, etc).
     
  6. K4VLF

    K4VLF Ham Member QRZ Page

    Well I got mine kinda decoding - every few minutes at least. My older laptop may be causing issues, because the decode cycle takes 15 seconds or so.

    Anybody know if a slow decode will hang things up? Like, because it is still decoding , the first few seconds of a new RX message is missed, and therefore the sw drops the entire message??
     
  7. AA8TA

    AA8TA Ham Member QRZ Page

    My setup includes a Signalink and a serial connection from my laptop to the radio. The serial connection is so WSJT-X can control the 2nd VFO and it also keys the transmitter. The Signalink functions as a sound card; to keep it from chattering, I have the delay on it set so that it begins to transmit about 2 seconds after the radio is keyed. The decoding is also well under way before the Signalink switches out.

    I think I could go a little longer than 2 seconds. I would have to dig into the protocol to see how much. There are some timing or sync tones sent at first but I don't know how long those are.
     
  8. N2ADV

    N2ADV XML Subscriber QRZ Page

    My old (like 10 years old) Sony Vaio laptop had trouble as you describe... Turning off multi-decode running the old JT65HF program would do the trick but you can't do that with WSJTX as far as I know! Even WSJTX gives priority to decoding the signal in your selected part of the waterfall, however, so you should see something. Are you possibly overdriving your laptop (audio )?
     
    Last edited: Aug 21, 2014
  9. KQ0J

    KQ0J XML Subscriber QRZ Page

    I had an old PC that would get real slow decodes - I killed all the programs except the JT65 program that I did not need - which was pretty much everything and turned off PSK reporting and turned off my network wireless card and it worked OK unless the band was crowded. Also there was a bug in some soundcards in slow PC's - I got a parm from Joe Taylor to change and that solved WSJT-X decode problems. I upgraded the PC and its all good now I can run HRD suite and WSJTX and a browser now no problem.
     
  10. N2ADV

    N2ADV XML Subscriber QRZ Page

    Oh look, a perfect example of said "crap" on JT65:

    1948 Transmitting 18.102 MHz JT65: CQ N2ADV FN23
    1950 Transmitting 18.102 MHz JT65: CQ N2ADV FN23
    1952 Transmitting 18.102 MHz JT65: CQ N2ADV FN23
    1954 Transmitting 18.102 MHz JT65: CQ N2ADV FN23
    1956 Transmitting 18.102 MHz JT65: CQ N2ADV FN23
    1957 -16 -0.4 1217 # N2ADV A61ZX -12
    1958 Transmitting 18.102 MHz JT65: A61ZX N2ADV R-16
    1959 -20 -0.4 1218 # N2ADV RRR 73
    2000 Transmitting 18.102 MHz JT65: A61ZX RRR 73
    2001 -18 -0.5 1220 # N2ADV RRR 73
    2002 Transmitting 18.102 MHz JT65: CQ N2ADV FN23
    2003 -17 -0.5 1221 # CQ NA A61ZX

    Come on, really?
     
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