Hi Ernest, I find that even ďhigh powerĒ stations have problems being ďstompedĒ by other operators on AO51. Itís my opinion that the problem isnít the amount of power being run, but the fact that many operators are trying to run half-duplex and arenít able to hear the downlink while transmitting. Itís common to hear stations calling over existing QSOís and never acknowledging the stations that attempt to answer them. Itís also common to have stations calling off frequency enough that they are un-intelligible but near enough to lock the PL and make the satellite un-useable to other operators. Both these problems result when the offending operator isnít able to hear the downlink while transmitting and as a result has no idea if he/she is actually accessing the satellite. Even operators that do manage to make QSOí s while running half-duplex often transmit over other operators because they simply canít hear them. Add this to the somewhat crowded conditions on a single channel satellite and the resulting confusion multiplies the problem. I operate both base and portable with an arrow antenna and a handheld (full-duplex) and my impression is the problems arenít much worse for the portable stations than for the base. I donít have a solution to the problem, just my observations. Steve .. AI7W Lm #2270 -----Original Message----- From: owner-AMSAT-BB@amsat.org [mailto:owner-AMSAT-BB@amsat.org]On Behalf Of NCC-1701E Sent: Saturday, April 30, 2005 06:52 UTC To: firstname.lastname@example.org Subject: [amsat-bb] AO-51 contacts and QSL info. Dear members: As I read the info on the Echo site, It has come time to say a few words about all the high powered stations accessing AO-51 and stomping the daylights out of the HT users. I was hoping there would be some form of "gentlemen's" agreement on high power to access this particular bird, but since I have been using this particular bird during its pass over my location, I find it very difficult to get my call in over the others running signals well in excess of 5 watts(plus ant. gain) that I and many users operate with. 50+ watts ERP or greater in my view, is not keeping with the 'spirit' of low powered use of this satellite, and it makes it almost impossible to make a QSO with a station that is 6 degrees above the northern horizon while a big gun is calling from 6 degrees on the southern horizon and still blowing me out of the water so I can't hear this northern contact return my call. It's not rude, but it is frustrating at times to be working a VE6 and hearing him/her getting stomped by a W4 that is close to LOS and yet 'we' can not complete the contact due to this form of QRM. I know I am a small time operator, and I am not writing this to appear as a n argument of sorts, just an informative note to kindly request all users to run as close to the HT level as originally intended so all users have equal oportunity to make good contacts, and not have to do the HF style hunt and pounce routine on 20 meters during a contest. I'm not an AMSAT member yet, but will be very soon though.