WALLOOP ANTENNA - Simple Homemade Project ( +openWSPR receiver )

Рет қаралды 28,167

3 ай бұрын

WALLOOP is an indoor Magloop Antenna intended for use with receivers, transmitters, WSPR devices atc. Antenna is fixed on the wall and is easy to tune. Works fine from 10MHz to 29MHz. Less sensitive to local noise than traditional whip antennas or wires. Extra small dimensions.
openWSPR Project: remoteqth.com/openWSPR.php
openWSPR Video: • OpenWSPR - Mini WSPR S...
WSPR Network Map: www.wsprnet.org/drupal/wsprne...
ANTENNA DETAILS:
- - Walloop Antenna Diameter: 260 mm
- - Main Loop Length: 2x 824 mm (1648mm in total)
- - Main Loop Coax: Belden H1000 (can be used also similar 10mm thick)
- - Coupling Loop Length: 165 mm
- - Coupling Loop Wire: 10 mm2 solid Copper wire
- - Used Capacitor: 2x 380pF dual gang (slightly different than showed spare one in the video)
- - Feedline: RG-58 coaxial cable with BNC connector
- - Base Plate: Thick Plastic Board (can be used also wood or plywood)
#walloop #antenna #wspr

Пікірлер: 37

@NJF60 3 ай бұрын

Paul, you are very talented. Thanks for this instructional video. I may just try and build one.

@m7trsradio 3 ай бұрын

Great build and work Paul. You are very talented 73

@lmantuano 3 ай бұрын

Hello Paul , thank you for all the great work you're doing about the making and showing the assembly of the antenna, BUT I got really lost and I wished you had shown a schematic diagram of the connection of the loop to the variable cap.. just saying... thanx & regards, Luigi VK3OLA

@techjohnc3379 3 ай бұрын

Excellent project and presentation. I have all the parts for this weekend's project. The closet door in my office will make a good rotator. John K0EBC

@Andy2e0ree 3 ай бұрын

Looks very interesting Paul I give it ago over the weekend

@gamlemann53 3 ай бұрын

Nice little antenna! Thank's for this very good video! The best from LB1NH 🙂

@imrichmorvay2227 3 күн бұрын

Pavol Briliant!!! Thanks a Lot

@geneishikawa607 3 ай бұрын

Looks interesting, but what's the difference from a two-turn loop using a single 1648mm coax? It was not clear enough how the 2nd option was built.

@navigatorphotografix1715 3 ай бұрын

Hi Paul - love it ! Would you ever consider building one of these for another ham radio operator ? My build skills are poor but have always wanted to try mag loops !

@SangiTariq 3 ай бұрын

Great antenna

@patriceh6316 3 ай бұрын

Hello, loops connections explanations are a little bit confused, and not realy clear, just a simpke schematic should be better isnt it?

@NamasenITN 2 ай бұрын

I agree with your criticism. Several minutes of confused explanation could have been replaced by a couple of sketches, where series capacitors or series capacitors would have been commented. Maybe he underestimates his audience.

@pappalardo938 9 күн бұрын

⁠@@NamasenITNpub

@soldadodecristo9254 Ай бұрын

buenas noches Poul gracias por el video y tu trabajo para informar , te comento que me fabrique una loop magnetica para los 40 metros con tubo de aluminio y funciona bastante bien e tenido barios contactos con otros colegas radioaficionados. Saludos de CD3FZS ...73

@blugoose86 3 ай бұрын

Question. When figuring the size of the small loop ( ie 1/5 diameter of large loop ), do you use the equation of the circumference of a single loop, or the circumference X2, since the two loops are wired in series? Thanks from Jim KA9TII

@francoismakowski4990 21 күн бұрын

Thank you very much Paul for your always interesting videos. Would it be possible for you to make us a diagram as clear as possible of the two options you indicate to connect the two coaxial loops with the capacitor? Thank you very much in advance. 73 friendly from EA2BCT

@DJMotavirust 2 ай бұрын

If you choose the four loops option, won't be importat that two of them would be shielded by the two others? Will they receive signals well? For example if we use just as reception antenna only.

@BrockNanson 3 ай бұрын

Very interesting video! I'm very surprised that you were able to run 10 watts with that very narrow gap capacitor! I would have expected it to arc even at 5 watts. The double loop design also increases the voltage seen at the capacitor when compared to a single loop. I'm wondering why you used the center conductors of the coax, rather than the shield. My understanding is that the surface area of the loop is very important and therefore, using the shield instead would improve performance. I don't think I've seen the center and shield used to extend the effective length of the loop. Have you put one together that way to test, or are you speculating?

@janliszkowski4637 3 ай бұрын

Hi OM0ET, what is the voltage on this capacitor during TX?

@horiamorariu 3 ай бұрын

Great project, many thanks for the very detailed explanations. One minor observation, if you have the possibility to 3dit and upload again the material: at minute 19: 50, the SWR minimum value is 1. It never goes to 0. Cheers! 73 by YO2MNE

@OM0ET 3 ай бұрын

Thank you. I am sorry but is not possible to edit already updoaded videos, but I am sure people will understand the point 😃👍

@ICEDoTDK 3 ай бұрын

god job

@Ghostwritersinthesky 2 ай бұрын

What are the measures for that antenna for 14250KHz without an extra tuning capacitor ?

@markusm.lambers8893 3 ай бұрын

Hello Paul, nice GDR-made capacitor you have here. Made in 1989, TLG aproved, a 'good' one! Very old stock, I think I still have a view of them in my drawer! Is it not 'possible' to use it for 'QRPp-TRX action' ? (sending with less than 1W?) Do you try this? Thanks a lot for an other interesting video! 73 de Markus - db9pz (JN39fq - 3miles/5km east of LX)

@azala581971 3 ай бұрын

How to make similar but for 40 20 15 10 meters for 2 wat digital ft8 trx?

@robertdec3713 3 ай бұрын

A question - what You do with shields of main loop coax? Are they connected somewhere?

@M6MRP 2 ай бұрын

built mine and it works 40-10, no shield connection required anywhere, hope this helps

@stevec5000 3 ай бұрын

I don't see the point of a loop antenna. I tested one, a GOOZEEZOO MRA-821, using an Eton Elite 750 receiver but it didn't pick up as well as the radio's built in whip antenna and also gets more noise!

@Helmut6363 3 ай бұрын

Hello Paul, will it work on 11 meter also ?

@M6MRP 2 ай бұрын

yes mine works well on 27mHz

@CarlindoLago 3 ай бұрын

Couldn’t you use auto tune to reach 40M?

@M6MRP 2 ай бұрын

mine tunes 10-40 easily but its 2 x 84cm loops

@CathodeRayNipplez 3 ай бұрын

I don't understand indoor antennas unless you live in North Korea. The best indoor antenna will struggle against the worst outdoor antenna.

@stevec5000 3 ай бұрын

You have to be able to reach the tuning knob to be able to tune it and that's one of the main drawbacks of this type of antenna so you wouldn't want to put it outside where it's out of reach or in a snow storm.

@Ghostwritersinthesky 2 ай бұрын

Some people are not allowed to put up antennas outside.

@CathodeRayNipplez 2 ай бұрын

@@Ghostwritersinthesky DOH! Didn't even think of that. Sound obvious now. 🙄