I think I recall seeing someone post somewhere that BPSK500 goes over the US throughput limit, but I've never seen what appears to be a well detailed explanation. Also, there seems to be varying opinions on how to calculate baud rates from wpm (wpm divided by 1.2?). It's all quite confusing. I wish we could just go to regulation by bandwidth with a separate playground for unattended ops. The robots in any bandwidth need to have their own allocations which makes sense for anyone on either side of the fence (whether you hate the robots or love them). We really need to get rid of the throughput limitation, which contradicts one of the key reasons for our amateur radio frequency allocation which is the advancement of the art (and technology). BTW, BPSK500 leaves a bit to be desired unless you're on a near full quieting path. -Dave, KB3FXI ________________________________ From: Bernard Dekok <kc9sgv@xxxxxxxxx> To: pskmail@xxxxxxxxxxxxx Sent: Monday, January 23, 2012 3:49 PM Subject: [pskmail] 300 Baud Rate in the USA Ok, So I read up a bit on this here in the PSKMail archives. 300 Baud max on the HF bands in the USA. So what is the PSKMail baud rate at 500 HZ ? Why is PSK500 not allowed in the USA, when Winmor can use the 500 HZ mode unattended ? Winmor clients can indeed use the 1600 HZ mode if the station is attended. Some USA Winmor servers (RMS's), even run at 1600 HZ, in "attended" mode. What is interesting is that the Winmor baud rate is only 93 baud on 1600 HZ. See here and download "Winmor Rate": http://www.winlink.org/WINMOR Could we run a PSKMail PSK500 server in "attended" mode in the USA ? How about "unattended", but under control operator/sysop control via remote ops (say by VHF or Iphone/Echolink) from the lawnmower in the yard while indeed mowing the lawn ? We need more and faster PSKMail servers in the USA. Bernie, KC9SGV Chicago.