Re: SWR issue on KPA500
Elecraft can help you with one of those - ring the helpline and ask for a long weight.
From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Ray Maxfield via groups.io
Sent: 27 August 2020 16:40
Subject: Re: [Elecraft-K3] SWR issue on KPA500
I know I will get Hate mail…….
How did you get your License with that statement ?
(Don’t know what the “put a 50 ohm load on it” means though. What would I be looking for?)
Contact you Elmer for Help………. Ray WA6VAB
I have a K3 à KPA500 à KAT500 à a remotely tuned antenna. When I am on the air I either use the KAT500 to match my antenna, while the remote tuner at the antenna is in bypass... OR I have the KAT500 in bypass and match my antenna with the remote tuner. I NEVER use both the remote tuner AND the KAT500 at the same time. Do I correctly understand that is what you are doing? I don't have an MFJ1788, but from what I read, it should tune to 40 meters automatically, so an additional tuner in the shack would be superfluous. As a first step, I would suggest you put the KAT500 and the KPA500 both into bypass and make sure the '1788 presents a low SWR to the K3s when running 10 watts. If not, the problem is in the antenna. If it works OK that way, then raise the power to the 53 watts that you normally run but without the KAT500 and see if the problem persists.
The suggestion to "put a 50-ohm load on it" means to replace the antenna with a 50-ohm dummy load. If the problem goes away, then you know the problem is in the antenna or remote tuner.
I realize you have gotten several responses. I hope one of them helps you figure out where the problem is so you can get back to having fun on the air.
73 de Dave - K9FN