6400 with ATU and QSK?

Eric Tucker

I'm considering purchasing a 6400 with internal ATU. I'm predominantly a CW op and use full break-in. Are there still problems with full QSK when the internal ATU is fitted. I've trawlled through old posts that discuss the problem but they all seem to be at least 2 years old. Does this mean that the problem has been solved or does it still exist? At present I run an Elecraft K3 that has excellent QSK and I don't like the thought of anything inferior.

KD0RC

Hi Eric, whether you would be happy with the Flex QSK probably depends on your expectations. I use full QSK with my 6400 and really like it. I don't think I can quite hear between dots at 24 WPM, but I can certainly hear between words. This may just be a function of how I have my radio set up. Having never operated a K3, I can't really compare the two. How fast can you listen between dots on the K3?

If you can find someone locally with a Flex 6400 or 6600 with the latest release to try out QSK, that would be best. Only you know if it is good enough to warrant the purchase.

I do know that at least one other major brand of SDR radio does not offer QSK at all, so you are right to question it.

Eric Tucker

Thanks Len. The K3 does let me listen between dots. It's just like receiving normally with the sidetone superimposed over the top. Unfortunately I don't have any locals with Flex rigs to listen to, so will have to glean as much as I can from other users in the Community. Thanks again for your info.

Vy 73, Eric G3TXZ.