Showing posts with label jt65-hf. Show all posts
Showing posts with label jt65-hf. Show all posts

27 Jul 2014

Continuing JT65/JT9 today

When we get back from shopping I shall return to JT65-HF and JT9-1 modes hoping to work more stations. Yesterday, staying on 20m, I worked 4 Europeans running 2.5 or 5W. JT65-HF is very intuitive and works well. Althought I have had JT9-1 QSOs on 10m in the past, I suspect the rig stability is "challenging" and JT65-HF gives me a better chance. JT65-HF is some 4dB worse than WSPR but the TX period is only 48 secs (1 minute TX period but actual TX is less) so may be better with QSB?  JT9-1 is a narrower bandwidth mode than JT65-HF and is about 2dB worse than WSPR. Of course, JT65 and JT9 are proper QSO modes.

Sunspot count today is 76 (decent) and 20-30MHz conditions are supposed to be "normal" so there could well be some F2 (as well as Es) on 10m today. JT65-HF and JT9-1 on 10m are calling I think.

The great advantage of WSPR is you can set the rig running and monitor things in another room. JT65 and JT9 seem to require "hands on" operation, which is fine.

26 Jul 2014

More JT65 QSOs

This evening I went on 20m JT65 again and managed a couple of European QSOs in reply to the CQs of others. I am using JT65-HF software that is very simple to use. So far I have used the FT817 at either 2.5 or 5W.
JT65-HF screenshot
If you see a station calling CQ (shows up in green) you just click on it to start a QSO with that station. If he copies you and replies then the started QSO shows up in red - all very simple. Wonder if there is a similar (easy) package for JT9-1 on HF?

Looking on PSK Reporter I see plenty of USA stations were copying me too, so it should not be too hard to work DX with just a little effort even with my compromise antenna. When 10m and 6m are open, DX should be easier still.

With JT65-HF and JT9-1,  I have to be in the shack, but at least there is no speaking, saving my poor voice.

30 Jan 2014

WSPRnet database was down

This morning, the WSPRnet on-line database has been out of action, so it is not possible to see who is receiving transmissions. This is a handicap of WSPR: when the database works it is a great asset and help, but when down for any reason, the whole fun of WSPR disappears. At best, WSPR is really a QRP BEACONING system, not really a 2-way communications system. JT65-HF and JT9-1 are ideal for QRP 2-way communications on HF.

 As of 1500z, the database was still struggling - but there occasionally.

26 Jan 2014

JT65-HF QSOs on 10m

Today (in between doing the RSPB annual bird count) I had some digital QSOs on 10m with Europe and N. America. The mode works with weak signals but it takes several minutes to complete a QSO. I also tried JT9-1 but there was no activity when I was on. WSPR is easier but does not really support 2-way QSOs whereas JT65-HF and JT9-1 both do.
JT65-HF QSO today

22 Dec 2012

JT65-HF QSO

It is some while since I last tried JT65-HF mode for a QSO, so this evening I had a go on one of my difficult bands in the evenings (because of the local noise level) i.e. 80m. A short listen and reply to DK6CS resulted in a very solid QSO both ways with QRP. I must give this a go on the higher bands, although I find the 1 minute TX/RX slots rather slow, with a minute to know if your response to a CQ has been successful. Still it works with weak signals and allows me to work stations that might not otherwise be possible.
JT65-HF screen on 80m a short while ago