Below is some information on the bandwidth required for JT-65. This was copied from one of the JT-65 websites. JT65A operators use USB VFO FREQUENCY for spots. JT65A signal is about 1.3+kHz higher th
I checked AA1K on 160 at various times. Before the event he was about S1. During the event he climbed to S9+10. There were lots of other strong signals too. Here in north Alabama they said 97% covera
Great job by the 3C0L on 160. They logged about 900 Qs last night on 160. They started slow but picked up steam later. I can only imagine what that enormous pile must have sounded like on their end.
I have a problem for which someone on this forum has the solution. I know that because I have seen that message sometime in the past. The problem is that my rotator is rectifying a couple of AM stati
Unfortunately no. Already tried that. That would have been too easy of a fix. Jerry There's a good chance the problem originates inyour control box rather than your rotator. Does the problem stop if
Likely all the spurs you see on 160 that are caused by AM stations will land on 10 kHz increments because the stations are spaced on 10 kHz increments. I identified one of the stations that was a big
Thanks George. I'm pretty sure that the mixer in my case is the rotator or mast contact. All I have to do to knock the spur down is just barely move the rotator. It will stay down for a few minutes,
*I put the strap around the rotator today. I no longer have a birdie on 1820. Not a trace of it on any antenna. Based on symptons, I can only conclude it was caused by intermittent contact at the rot
Thanks George "AM 890 x 2 = 1780 KHz + 1730 KHz = 3510 <- - your 80 meter birdie." Yep, that works, except I had a typo when saying one of the contributor to the 160 problem was 1730. No station on 1
If you run a NEC analysis it will show that a 160 dipole at a half wavelength height will blow away any vertical when the signal is broadside to the dipole. The people that have tried this say it ain
I'm not sure how many people have actually compared the new digital modes with CW as far as low signal level decoding. I did that for a long time when JT-65 first became available. Back then it was m
I built a LoG antenna last year and evaluated it. Most of the claims for the performance of this antenna are in error. I posted the summary of performance here: http://forums.qrz.com/index.php?thread
I may as well give you the results of my measurements with BOGs and dipoles on the ground. It seems to be a lot different from the data I am hearing from other people. This experimentation started wh
Here is an interesting pdf document including information on the effects of Earth's Electron Gyrofrequency on 160 meters. The 160-Meter Band: An Enigma Shrouded in Mystery http://solar.spacew.com/cq/
Joe said "You want to get on 160, but do not have an actual 160 antenna. So you connect the largest antenna ya have, usually a 80 meter dipole, but you just push the connector in just so only the cen
While sitting around being bored and recovering from a gall bladder operation, I decided to do some experiments with FT8. First thing I did was upgrade the software to WSJT-X v2.0. I hope this post d
Joe, thanks for the information. I am not exactly sure what all that means. My conclusions were based on observed data. It seems pretty obvious to me that a signal that is more than 50 dB above the n
That would be my definition of noise power also. That would not help explain the numbers produced by FT8. It's curious that my VFO1 - VFO2 measurement produces numbers very close to what FT8 reports.
Thanks to the folks commenting on how FT8 works. That was what I originally thought might be a possibility because that would result in a real S/N number. However that doesn't seem to be the case. Th
Yesterday I said " I don't have a measurement with the results of that showdown of CW versus FT8 in dead band conditions but the answer would be interesting to know." This afternoon I tried to get an