Keyboard Shortcuts
Likes
Search
AL80-B tuned input
|
NI5L
The 2 prior posts are a perfect segue into my question. My input SWR on 30 is over 3 to 1 and 12 meters is about 2 to 1. The rest seem ok.?
I have searched high and low for instructions on the proper method to tune the input slugs. I know there will be compromises between 20/30, 15/17 and AUX output per band.? Do any of you guys have a simple way to adjust the slugs to get the input SWR down to a better place? I'm lost here. Thanks and 73 Warren / NI5L |
¿ªÔÆÌåÓýHere's the secret for 30m. 20m and 30m share the same slug and they are far apart in
frequency. The advice I got from Ameritron is that you can tune
for 20m OR tune for 30m. You can't have both. Make your choice and
live with it. Given the legal constraints on 30m, it is most logical to set it
for 20m but I ain't gonna judge anyone. 10m and 12m are similar, to a certain extent. You may just need to live with the 2:1 on 12m. If you are a CW man only, you will need to insert additional slugs in the 160m and 80m coil formers.? The cores are all but impossible to move or get out. A good thing to assist is to use locksmiths graphite powder and liberally puff it down into the coil tubes from each end before you start trying to move them.
On 30/12/2023 9:43 am, NI5L wrote:
The 2 prior posts are a perfect segue into my question. My input SWR on 30 is over 3 to 1 and 12 meters is about 2 to 1. The rest seem ok.? |
¿ªÔÆÌåÓýI forgot to mention that the capacitor values quoted in the user manual bear no resmblance to the ones mounted on the board. I bought a complete new board from Ameritron and same thing. Completely different to the manual. Alek VK6APK On 30/12/2023 9:43 am, NI5L wrote:
The 2 prior posts are a perfect segue into my question. My input SWR on 30 is over 3 to 1 and 12 meters is about 2 to 1. The rest seem ok.? |