When someone is working quickly -- clearly trying to work a lot of stations -- but pretty clearly isn't contesting, what's the etiquette when they 73 you and end the contact but you're not sure they were talking to you?
To be specific, I'm listening to S51DX today on 20m and he's working quickly and racking up contacts. But he's being a fairly informal (wishing people a good day and the like) so I'm pretty sure he's not contesting.
When I gave my call he read back something that sounded a lot like my call, but some noise got it so I couldn't make out if it really was mine or just a similar call. And there's a lot of traffic -- lots of people are trying to work him so it could have been someone else.
Is it OK manners to try again in 10 minutes or so and see if I can get a less ambiguous contact? Or is that frowned upon? He doesn't use any of the online QSL sites so I can't check to see if I showed up in his log.