Re: [Elecraft] K3 KPA500 3 days in.

I use solid-state amp with my K3. With the amp on standby in circuit, I tune, then activate the amp. The K3 and amp work just fine. Tuner memory may be an issue when doing a QSY so disabling the tuner in that circumstance would probably be of benefit. Any losses added by the tuner are

[Elecraft] K3 KPA500 3 days in.

My K3 is 2.5 yr.s old. I never bothered with updates as I was happy with the radio as is. When my friend WB4YDL helped me get the amp going we had to run the latest updates. There is a new one that must be run to be able to use the amp. I am using the Elecraft interconnect cable. . I

Re: [Elecraft] K3 KPA500 3 days in.

You don't have a problem with your 6M setup - it's working well. When you use the 100W K3 ATU with the amp bypassed, it sees the antenna as its load and adjusts the match to let the K3 see a 1:1 SWR. When you put the amp in line, the K3 sees the amp as its load, not the antenna. The SWR seen by