ferrite loop fundamentals How to build the exact replica of this antenna

Part 2 in the ferrite loop series.
Here we examine the antenna itself, show selectivity, how improve nulls and construction dimensions.
Thank you
PaulC
W1VLF

[@timmack2415]

As a ham for 31 years, I appreciate your detailed videos on the antenna.
As a guitar player, I must admit that this is the best use of wood that otherwise would have been an Ovarian guitar. The squeaky noise while turning the loop, sounds better than any Ovarian I've ever heard. 😁

[@uuser5261]

made a similar antenna out of scrap today , broken ferrite rod 5.1/2 inches long( in 4 pieces) in shrink to keep it together a length of bell wire(phone cable) about 30ish turns - 4 turns on the feed , handy var cap , balun and away it went signals inside house almost as good as signals outside at around 800kz to 3800kz .. very much good fun for 10 mins work ,thanks! happy new year

[@HamRadioAlaska]

Thanks Paul for all your videos. Very helpful and really helped me with a common mode noise issue.

[@jeff-73]

Excellent antenna video for MW people like me. Not only do you describe everything in up close detail, but you have given me many new ideas and possibilities to make my own. Thanks for your hard work in making this. Absolutely love your videos.

[@W1VLF]

Thank you JJ... The most important part of your comment s the "you have given me many new ideas and possibilities to make my own" That make me happy because that is what I am tryin to do, get people to start building and enjoying radio. Your comment means a lot to me thank You W1VLF

[@catalinalb1722]

Yes! VLF, loops and ferrite sticks are awesome. 630m and 2200m bands I found them interesting! 🙂

[@originalgrantbob]

Great demo. I think it's easier to see what's going on with the SDR display. PiP works well.

[@francescodigiovanni4632]

Spectacular video!
Thank you Paul
73, Francesco, IN3XZP

[@W1VLF]

Thank you Francesco. I am trying make the videos interesting and informative. W1VLF

[@dandruff7807]

Also try placing a regular or a neodymium magnet next to the ferrite antenna to increase the gain of the radio signal.

[@dandruff7807]

Try your bcb ferrite loop antenna in conjunction with your round bcb inductive loop antenna.

[@charlesnelson619]

I wouldn't think making the ferrite rod longer by having two of them would make it measurably more sensitive. Have you tried just one and compare ?

[@s.guttmann6625]

W1VLF: Are the ferrite bars from THE USSR and Ucraine about the same? How about the Chinese ones? I don't see the permeability number on neither one on e-bay. Is the Litz wire AWG38 X 600 strands #A33Q LW o.k? I see a few different numbers on the numerator and 38 in the denominator. Which one do I use? Thanks

[@zekesgm]

Thanks for all your interesting videos. Made the frame following your directions. Having trouble getting the T that's supposed to allow the frame to tilt to move freely like yours does. Tried to lubricate pipe it moves around with various lubricants but that doesn't make a difference. Any suggestions?

[@W1VLF]

Hello Did you drill out the "T" with 5/8" .625" drill? That's the first step and then use a round file to get the proper slip fit. Thats all I did on mine. I have done this many times on 1'2" CPVC here in the US nd its a good fit. W1VLF

[@TheGmr140]

Just make a large loop on the ground, the best setup for hf rx signals

[@TheSemtexCow]

You want the antenna to be the antenna, and the coax to be the coax.
That puts pay to remote variable capacitor tuning of the resonance?
As in having the antenna in my loft and the tuning capacitor in my hobby room?
Thanks for the videos again.

[@carjensen]

Thank you for this. I have ordered rods and, litz wire. I want to build a small cap bank to have a 300 pf, 200 pf, 100 pf, 50pf with a variable cap. Is there a voltage rating I need?

[@johnwest7993]

Not for receive. Low voltage will be fine.

[@qrpradiolistner7232]

Great ... always interesting your tests ... congratulations.
73. Giuseppe iz0gzw.

[@vladnickul]

I thought that ferite antena are omnidirectional... i actually bought one that says that... what are the null point?

[@francescodigiovanni4632]

Hi Paul,
wich Litz wire? How many strands is the best? The more number of strands is better, or?
73, Francesco, IN3XZP

[@W1VLF]

Francesco Litz that uses #46 wire with 175 strands is readily available on Ebay. It is expensive. 600 strands of #46 is even better, but even more expensive. W1VLF

[@paulschmolke188]

Are the ferrite rods joined at the ends or simply laying loose in the main tube?

[@W1VLF]

Hi Again Paul !!! No, the tube is just a tiny bit longer than the rods. I use expanding glue inside the tube to hold the rods firmly in place. As long as the rods cannot move, the antenna inductance will be stable. W1VLF

[@catalinalb1722]

Wish I could find those L and T pvc pipe connectors at the local hardware store, unfortunately I didn't find them here in Germany

[@W1VLF]

I am sorry to hear that... I looked on Ebay and they are readily available but shipping to Germany might be expensive. W1VLF

[@francescodigiovanni4632]

Same problem here in Italy. :-(

[@mikemullenix6956]

What air capacitor value do you use ? Kg7uqo

[@javiermac381]

Why not combine ferrite rods to make one giant rod, 10cm in diameter and a meter long? Fsl antenna, perhaps. Then do a dx result.

[@Lechoslowianin]

is it a transmitting or only receiving antenna?

[@sclerismockrey8506]

receive only