Re: Topband: FT8 Observations

2018-04-25 Thread VK3HJ
Having no interest in FT8 or JT modes (for now), I don't have much to comment on that, but do have a few comments on the subsequent discussion. My feeling is that, as mentioned already, many stations haven't made a decent job of improving their receiving capability, or are unable to do so.

Re: Topband: FT8 Observations

2018-04-25 Thread K4SAV
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 much easier to separate one station and compare the reported S/N to what I see on my receiver

Re: Topband: FT8 Observations

2018-04-25 Thread Joe Subich, W4TV
On 2018-04-23 12:08 PM, Tim Shoppa wrote: On being able to hear signals at -12 to -17 dB on FT8, I do broadly > agree. A CW signal at those levels would be easily heard and copied > by any decent CW operator. -12 to -17 dB on FT8 (or any of the other "JT modes") is signal to noise + QRM in a

Re: Topband: FT8 Observations

2018-04-25 Thread Mike Waters
I have no idea how FT8 compares with other weak-signal digital modes (such as the ones that JT himself wrote), Dave. If no one knows here, then Google is your friend. :-) As for waiting until next fall and winter, keep in mind that we are approaching the southern hemisphere's fall and winter.

Re: Topband: FT8 Observations

2018-04-25 Thread David Olean
  Hi Mike and all who responded.     I guess I was just underwhelmed at what I could accomplish on FT8 vs CW on 160.  I figured it would open up a whole new level of rare countries and places that were now workable to me. Working Kazakhstan on 160 CW from my location is difficult, but doable

Re: Topband: FT8 Observations

2018-04-25 Thread Grant Saviers
Dave, Remember that the reported S/N is relative to the receive station noise + QRM level. Since many TB stations don't have your antennas and have high noise, they can't decode you or report a poor S/N. I get +9 and -18 reports from YB stations a hundred KM apart. It's not spotlight

Re: Topband: FT8 Observations

2018-04-25 Thread Mike DeChristopher
Hi Dave, In my [very, very, extremely] limited experiences with any of the JT modes, it has always seemed to me that many are alligators. I think the FT8 craze has inspired a lot of people to get on 160 with compromise tx antennas -- this is a good thing -- but I'm not sure they realize how much

Re: Topband: FT8 Observations

2018-04-25 Thread Tim Shoppa
On being able to hear signals at -12 to -17 dB on FT8, I do broadly agree. A CW signal at those levels would be easily heard and copied by any decent CW operator. I think a lot of the FT8 “processing gain” claims, assumes a really poor CW operator. A 0dB FT8 signal is not at noise level, it is

Topband: FT8 Observations

2018-04-23 Thread David Olean
I have been playing around with FT8 on 160M and am a bit puzzled. I have made plenty of contacts, but with many stations, it seems to require an inordinate amount of power to get their attention, or they do not respond at all. I also have noted that I can hear in a 2.8 kHz passband, signals