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Alright, so I finally got everything working properly. Well, maybe a better way to say it is I got an acceptable swr at the radio and at the antenna with the amp operating. By using the very helpful info here I made several adjustments in coax jumpers, air coils and some ferrite here and there...
So if I’m thinking correctly, any mismatch between the amp and radio (for instance anything that’s not exactly 50 ohms) will then only amplify a mismatch beyond the amp such as an antenna that isn’t exactly 50 ohms.
Is it possible the input tune would/could be different directly from the builder to my setup? I ask because he was showing less than 1w reflect even when driving the amp with a 200w driver? Sorry for all the questions...trying to learn as I go here. I appreciate all the help!
6 - hg2879/c transistors. Radio is tuned. But again, I think with the help of all the fine folks here...It’s performing properly as of late last night. Swr between the amp and radio is less than 1.5...swr between the amp and antenna is less than 1.3 with the amp operating. I still plan to ground...
Yes Sir...the problem is between the amp and radio. I’m running a Stryker 955 that shows swr on the radio...It showed 2.8-3 swr with the amp operating. I have three different swr meters that I’ve had inline after the amp and all read great between the amp and antenna. I’ve actually been making...
Low pass on the output side? That would cure issues between the radio and amp? I ask because I don’t have issues between the amp and antenna. (I’m still learning on all this.)
Ok...so a quick update. I put up my G31 beams today...installed two air choke as recommended earlier in this thread and by those specs. Still seeing some feedback but not nearly as bad as before. I’m showing about 2:1 swr at the radio when the amp is active...barely anything with the amp off...
By the way, would a coil of coax at the antenna provide a good choke or do I need to order an actual Balun choke? I’d coax works about how many coil should I start with and what diameter? Lmr400 ok or something else? Thanks!
First antenna was a Hustler Ground plane. A99 doesn’t have ground plane radials. And I do not have a choke at the antenna but could certainly give that a try. Thanks!!
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