CW settings for delay

Be ready for loud T/R relay clicking on CW if you need to leave the ATU engaged. So, as opposed to Elecraft, Icom with the IC-7610, and Kenwood, Flex Radio hasn’t been able to figure out how to provide silent pin diode T/R switching when the ATU is engaged. They claim to do it to minimize spurious; however, the K3 is one of the cleanest radios around.

Steve. 

By design the radio will not do QSK with ATU engaged for performance concerns. Flex did this intentionally to improve receive performance.  Use semi breakin when using the ATU.

I use about 300 ms delay with N1MM.  This will vary depending on what speed I am running which is typically between 26 - 30 WPM.  You want the delay long enough so the transmitter stays engaged during CW word spacing but not too long as to cut off the first character of a responding station. If you are running an older amplifier then it is especially important to keep the transmitter engaged during word spaces to avoid hot switching the T/R relay in your amp. 

You may want to experiment to find what is best for you. 

Joe
N3HEE

I don't think anyone answered you regarding low cut and high cut. Those are for SSB and I think you are just asking about CW?

As far as receive EQ, try bumping up the EQ frequencies in the 250 and 500 range and decreasing the others and see how that works for you. I have been able to pull DX out by doing this that I could not otherwise. I have them at levels they are about distorting.

I generally do not use the ATU in my 6600.  I use an SPE amp which even when not enabled has a built in ATU that is I think a little better than the one in the 6600.

Last night my cross town friend and I went full break-in at 35WPM without any issue. 

Since my radio and amp are in a shed, about 20 feet away it was like totally silent, nothing but high speed CW back and forth.

It was really cool.

It is the one reason I try to tell people not to go for the M model radios and do a 6600 plus a separate Maestro.

In my personal opinion this allows you to put the more noise 6600 a ways away and keep your operating area nice and quiet.

My full-break in friend uses an IC-7300 and I've been at his op position when he was full break in with another guy and the clicking, even in the 7300 is pretty insane.