Dave and I may have to differ somewhat on this one ! I have been using my K3 regularly on pactor since it first arrived back in November, admittedly on 3,000 Km + paths.
It's true that the timings initially were too slow for short hop amtor QSO's, This has now been largely resolved in firmware with some further speedups promised (and needed for best results). The Current K3 TX-RX timings in digital-s mode are at as good as most of the the other DSP IF radios out there Dave and I have had issues in tests between us but I am not entirely convinced that they are timing (or even directly K3) issues. It's a very short 80m hop between us and amtor can suffer badly under some multipath conditions . On the other hand I have had perfectly OK amtor QSO's with other EU stations as well as maintaining regular pactor2 and 3 schedules with my boating Friends. Pactor Throughput has, in the main been excellent, every bit as good as it was on the icom IC-7800 Amtor timings are much more critical, the K3 required the digital-s mode speedups in firmware but looking at the reviews on the ARRL website of some of the other DSP-IF radios that get the arrl ' amtor capable stamp' one wonders how they would perform in reality on amtor TX-RX turnaround Numbers tabulated from the ARRL reviews, all for radios they deem 'amtor capable' hope the table is not too messed up TX-RX RX-RX elecraft K3 22msec ~25msec (not measured by ARRL) TT orion2 30msec 18msec TT OmniVII 20msec 18msec Yaseu ft-2000D 24msec 37msec Yaseu FT-950 25msec 39msec Kenwood TS-480 23msec 12msec Kenwood TS-2000 18msec 10msec Icom IC-7800 15msec 10msec Icom IC 756pro3 24msec 10msec Icom IC-7000 24msec 12msec it would certainly be nice if it was faster, especially on RX-TX but it's certainly no laggard, a TXD (TxDelay) setting of 25msec seems adequate for correct operation The TNC here is an SCS PTC2E and I have been doing pactor 2/3 with my boating Friends since 2001 so I know pactor's capabilities well enough at this stage to spot when things are not going well in the throughput stakes www.northabout.com 73 Brendan EI6IZ -- Don‘t complain. Nobody will understand. Or care. And certainly don‘t try to fix the situation yourself. It‘s dangerous. Leave it to a highly untrained, unqualified, expendable professional. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com