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Jumper length.
- Thread starter Jim5570091
- Start date
Anyone have a 3D printer program to print a core for an ugly balun? I have a close friend that can print a couple.
Jim,
antennas can be a pain in the @$$ for sure. But honestly, this is how you learn, OM!
You will always have a different SWR readings in the shack if you do not isolate the antenna from the feedline. Remembering you are testing, a choke made from RG-58 or RG-213 would help you. (Just as a note, the idea is to have at least 20 dB of isolation with that choke, 30db ideally)
Again from Crawdad's link to the G3TXQ table (Link here: http://www.karinya.net/g3txq/chokes/ ):
The best choke for 11m made from RG-58 (same dimensions as the RG-213 choke) is: 5 Turns of RG-58, 4.25" inner diameter.
Below is a picture from the ARRL handbook of what you want to make. As you can see, the cable turns do not need to be perfectly side by side either. After you make it, place that sucker right at the antenna feed point.
The handbook also has notes different "Very Effective" chokes, in the pic below. Just information for you:
Keep trying !!!!
Michael
antennas can be a pain in the @$$ for sure. But honestly, this is how you learn, OM!
You will always have a different SWR readings in the shack if you do not isolate the antenna from the feedline. Remembering you are testing, a choke made from RG-58 or RG-213 would help you. (Just as a note, the idea is to have at least 20 dB of isolation with that choke, 30db ideally)
Again from Crawdad's link to the G3TXQ table (Link here: http://www.karinya.net/g3txq/chokes/ ):
The best choke for 11m made from RG-58 (same dimensions as the RG-213 choke) is: 5 Turns of RG-58, 4.25" inner diameter.
Below is a picture from the ARRL handbook of what you want to make. As you can see, the cable turns do not need to be perfectly side by side either. After you make it, place that sucker right at the antenna feed point.
The handbook also has notes different "Very Effective" chokes, in the pic below. Just information for you:
Keep trying !!!!
Michael
Just noticed this. Maybe it will help you.
Lightning Antenna assembly instructions (L6):
http://www.radiomanual.info/schemi/ACC_antenna/Lightning_antennas_L6_user.pdf
Lightning Antenna assembly instructions (L6):
http://www.radiomanual.info/schemi/ACC_antenna/Lightning_antennas_L6_user.pdf
Awesome. Thanks Michael. I have a local giga parts not too far from where I work . Going to head over there after work tomorrow and pick up 213. Still have to figure out a power supply for my main amp. Working 6 10 he shifts leaves little time to experiment. But I’ll update results when I can.
2 Quick question for the group.
1: Is there a way to check for unwanted RF on a coax shield?
2: Will placing clip on ferrite beads at the meter show a response on the SWR meter if there is?
1: Is there a way to check for unwanted RF on a coax shield?
2: Will placing clip on ferrite beads at the meter show a response on the SWR meter if there is?
- No one is chatting at the moment.
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@ BJ radionut:**NOTICE: K8MMM will be on 50.145** 100w / 2 el Moxon from Hamvention Fri and Sat....
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