How do we switch Beverage antennas in the field?
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- Опубліковано 25 сер 2024
- A dual relay high-isolation switch box is explained and a new design using a single relay and 1:1 "bread-breaker" isolation transformers to minimize common mode noise ingress is presented.
Ideas for deploying the RG-6 coax lines in the forest is also discussed, and shack switching ideas are talked about.
Here is the KiCad file for the braidbreaker switchbox design: drive.google.c...
Here is the BOM for the braidbreaker switchbox design:drive.google.c...
Gerber files: drive.google.c...
This is a gem. I'm glad that I'm able to process like 80% of what's all going on here. My jaw really dropped when you showed off how you just click around to remotely select what compass heading you want, like it's no big deal. Excellent work
You put so much work into the remote site. I have no words
Very informative set of technical videos. Much appreciated. My group has a number of BOG antennas and I'm looking at improving our feed / switching methods. A couple of questions. What is the purpose of the 470 uH chokes on the ground side of the input and output ports? And, although not covered in this video, I've seen an earth grounding point positioned ~25 ft from the switching box towards the receive point. What is it's purpose? I get the impression that the position and quantity of earth grounding points may be important in preventing unwanted signal pickup / coupling.
73, Bill K7UOP
Could you publish also the gerber file of the 4 relay box kikad file ? my board maker asks for the gerber only ! really thank Don IK2EGL
Just added Gerbers.
Also link here: drive.google.com/file/d/1vbtBKDbku6EJGS17_6Hrh7wY9TN_TFJb/view?usp=sharing
Is there any reason I couldn't use a bird 74 coax switch in my shack to select the beverage?
Les,
Yes, you could use a switch in the shack.
Usually we locate a remote switch in the field in order to minimize coax runs back to the shack. One long coax feedline out into the bush can feed multiple antennas using a remote switch.
@@ve6wz thank you, no doubt it's more economical as well. 73
Hi Steve, Very interesting presentation about your Beverage antenna array switching setup. I am curious about the 1:1 braid breaker transformers. You mention and show the binocular cores on the switch boards. What ferrite mix are they, -31 as well? How many turns each are used for the primary and secondary? - '73, Thomas - ac7a
The binocular cores are type 73 material core. 4 turns primary and 4 turns secondary. Ferrite multi-aperture core part number 2873000202 . Here is the Digikey part link: www.digikey.ca/en/products/detail/fair-rite-products-corp/2873000202/8593948