Відео

I did this with my MFJ end fed long wire. I tied the end off to my wire fence using a few feet of nylon rope. It works great!

I am using a 130 ft. EFHW in an inverted V configuration with a 25 ft aluminum telescoping mast in the center and ends up at 9 ft. high. I have the antenna wire running through a pully at the top of the mast. From Colorado, I am able to work South America, Japan, Australia, New Zealand, Russia, Europe, and the Caribbean. The antenna wire is really close to the aluminum mast, but there is not much I can do about that.

Dave, During ww2 all the bomber aircraft carried a life raft, rations,water and a rescue transmitter known as The Gibson 4:37 Girl. It was a hand crank transmitter and had a non insulated antenna wire. The antenna wire was sent into the air by means of a helium balloon , and the raft had a small cylinder of helium to fill the balloon, or there was a box kite with aluminum tube frame you would put together, not sure what the rest of the kits was maybe parachute material. The antenna is 300 ft long, you would hold it between your knees and crank the generator and it would send a SOS or it had a optional Morse code key to send a massage. I have a roll of that antenna wire, it is a braided copper wire smaller than kite string. There is no visible means to eliminate static from that antenna wire, unless it is internal. Any idea how they eliminated static from that between your knees in a life raft? Thanks for your thoughts. Enjoy your videos Jeff KI5HGT

Thank you, Dave. Have a happy Independence Day. N0QFT

What about as the antenna itself?

My 107’ Random wire antenna goes out of the house to a flagpole in front of the house to another flagpole in the back and lastly terminates at my shed peak 10’ above the ground. It is in a sloping U configuration and the SWR with a 5:1 unun is about 2.0 or less depending on the band. This antenna works on 10-160 meter bands and I get great signal reports. The wire is never touching the pole. An example of a great antenna that everyone will tell you won’t work. Just keep experimenting!! Thanks Dave.

Harbor freight sells a 20 ft. telescopic aluminum flagpole for around $90 (wait for a coupon event, and they can be bought for as little as $60), which is substantially less expensive than the aluminum masts sold at the ham radio stores like DX Engineering. Many people use them.... in fact, that's how I discovered them, by recommendation. These are also extremely popular with RV'ers, they use them as a mast for their Satellite (Starlink) dish antennas and as such, sometime it's hard to find a Harbor Freight that has the flagpoles in stock. I've had mine for almost 2 years, works great. I'm using it for both an EFHW wire antenna and a dual band 2M/70cm vertical antenna.

Hey Dave, Thanks for the video. What about if you put a 2m vertical up there? Like a Comet or Diamond? If it won't negatively affect it'd be a great mast...

Very interesting. I recently made a speaker wire vertical antenna and have it hang straight down attached to an Alumiglass extension pole I got at Lowe's. It extends from 8 up to 24 feet, with the extensions made of aluminum. The performance isn't great, but it works. I'm planning to make an inverted vee and just hang it from the top of the pole with a rope and see how it goes. Love your channel. KA9PHI

All right my friend kc8ikw here my name is Joseph Strauss everybody calls me Joey I got to ask a bonehead question I just got done watching your video and I understand the part about with the copper pipe that you could use that as ground when I got to know is I'm going to get some the foil strap from DX engineering and put that foil strap and my copper pipe and then run that copper pipe into my shack along with the along with the aluminum strap as what DX engineering cells can I have three ground rods outside my shack that is that's 8 ft deep that are 8 ft long running at copper pipe into my Shaq with the foil strap is what DX engineering sells how good a ground is that hooking that all to my water pipe inside my shack with a strap

Great video with really good advice.

USE A TRIPOD!

I don't think anybody is worried about how well they're receiving antenna will transmit. I'm just saying, tho. But I am having a hard time searching for receive antenna or receive only antenna information because apparently no one would use them so they want us to have an antenna that will transmit as well. I was thinking it would be logical to believe that there would be antenna types and etcetera that were are better for receiving that could best be put to use on an antenna that was meant never to transmit. Everyone wants to talk about transmitting on the receiving antenna. How well it will do it.

Excuse me but an "On-Air" results without an "on-air" contacts means nothing for me. Sorry !

I built my first code practice oscillator from parts I scavenged fro a Radio Shack FM band superregenerative receiver. I still have that coo and I completed an old Motorola cpo kit and chassised it.

Hi, Dave. 🙂 I'm logging just needed calls for QRZCQ makes a log map based on last 1000 QSO. PS These are the God's words written by king Solomon, Proverbs 22: 7: "The rich ruleth over the poor; And the borrower is servant to the lender." Wikipedia says US have a national debt at least since 1900. Independence of US is more then 120 years old lie. Other countries have a national debt too. Their liders lie blatantly about "independence" of their states. The problem is Devil runs the world. He is lier and murderer. This is the reason why deception and violence are everywhere. This is the reason why the whole world is Sodom. That's why we've got the Gospel about the God's kingdom. Jehovah would put everything in order. The dead will be resurected and we'll meet our loved ones again! :-)

Any arduino and a small speaker make a dirt cheap cpo and with a little additional code a simple keyer.

Google, “A One-Hour, No-Solder Code Practice oscillator” and you will find a paper written by WA8SME and K7CCC on building such a thing. I recently built one on a bread board for a few dollars.

Thanks ,Dave. Have a great week. N0QFT

Dave, you are a Master Instructor in anyone’s book. Another great video that not only demonstrated the results to be considered but opened our minds to more related questions like: Does it matter what the conductor material is? Does it matter if I use 1/4” tube or 1/4” solid rod?

Thanks for another awesome video OG.

DAVE, I like the way you said, prices have gone up a little bit since then , funny as heck 😂👋

A video on hairpin match would be highly apprecited. I feel don't quite understand yagi hairpin match.

I bet a trombone would make a nice tunable Jpole antenna , , already has a feedpoint installed too 😂

I have always understood that the thicker the antennae elements are the broader the bandwidth of the antenna is. But what do I know? I could be wrong.

Thanks Excelent

OMG Dave! It's EASY to build a Balun or Unun for darned near ANY impedance conversion ratio you like. The impedance ratio is just the square of the turns ratio. UnUns have a shared ground connection and BalUns don't. It's that simple! For example, if I wanted to feed an OCFD at around 15% from one end which exhibits an impedance of 1,250 ohms (at your desired frequency), that's just 50x25. So the turns ratio is the square root of 25 which is 5. You can get this with a simple 3 turn primary and 15 turn secondary. And the turns ratIo doesn't even have to be in integer number. It all derives from Ohm's Law and the fact that the power across any transformer must be the same on both sides...73 from K7RAW-The Antenna Whisperer (see my Channel for my full TennaTalk Series)

Another is phone based, HAMRS

I bored a hole through a window pass-through I made out of a carefully fitted piece of 2x4 for my 2nd floor shack window. The braid is bolted to a copper buss bar mounted just off the inside of the pass-through and goes out through a 1 inch piece of PVC flex conduit down to the ground rod below. The distance to the ground rod is about 15 ft. The copper buss bar has bolts and wing nuts attached to it so I can ground all my equipment to it in star fashion. It is also attached to my house ground via a two foot long braid to the nearest wall outlet so both grounds are at the same potential. Not an ideal setup -- I know, because there's the possibility the ground braid can act like an antenna, but there's not much I can do otherwise.

U never talked about the features inside the microphone. There where 2 switches where the batteries goes. One is a channel sequence switch and the other is low cut/ normal audio switch. I eas hoping u explained what the audio switch does but u missed it.

Liked the video very much. Always wondered what the story was about these antennas. I'm an OT and saw some designs back in the 60s' and was fascinated by them. One thing I'd need to understand though. MFJ sells you a nearly $600 antenna, it comes defective, and your grateful they let you fix it yourself. Just seems a company making a $600 anything should have good enough quality control that it doesn't leave the factory in a condition that the buyer needs to fix. I think Mr. Jue should come to my house and fix it for me. 73.

Hi , great video, we know that the characteristic impedance of a dipole is around 72ohms so early radio equipment were 75ohms and characteristic impedance for coax. Regards mark G8rde

Hvala na informacijama

Dave- Another great informative video as usual, but I have an off topic question. What is that led light show going on over on your desk? Many thanks. 73' de K4WRF

Dave, thanks SO MUCH for this video. I've been struggling with 1) How long they need to be 2) Do they need to be tuned 3) How many there needs to be. I'm planning my next ARRL Field Day to include (2) Ground-Mounted Hamsticks. I have everything I need to do this, except the knowledge for Radials/Counterpoise. Again, thanks so much!

Great question, most intriguing answer! Thanks!

Hvala!

QRZ has a great free online logbook. Also Log4OM includes some radio control features.

One of the biggest reasons I keep a log is because of bootlegging or pirating. That is unlicenced people stealing your callsign. If you keep getting QSLs from stations that are not in your logbook which mightp0 be from 1 or 2 a week or 4 or more a month, then it's probable that your call sign is pirated or bootlegged. Recently I have been suspicious of this. I log online with LoTW, QRZ, EQSL, and Club Log. I've been getting a fair number of unconfirmed QSLs on two of the sites. This is indicative of pirating/bootlegging. I'm staying off the air for a few weeks to see if I keep getting QSLs.

I have a written log of all my contacts, mostly CW, but more importantly, I log my times of operation. I read about a ham who was accused of interfering with a neighbors medical equipment and the ham was shut down. I keep a record of my times, band, rig, antenna and power, as evidence, in case of those kind of situations.

Thank you for this excellent explanation!

After too many crashes and lost logs I only use a written log book now.

Regarding the kite, I do not think they would need a big one. They could affix the impedance transformer to the earth with a tent peg and use very lite wire like SOTA beams DX-100.

Hi Dave, enjoyed your explanation about noise and speech. Stuart ZL2TW

I agree with the recommendation not buy any ham gear until you're licensed. You should first concentrate on passing the exam. Then when you do pass, go out and celebrate by buying your first HT (at the least). You'll be motivated more this way to get on the air! 73! N7YMZ

Can you show how to add an SO-239 crimped connector to a piece of coax cable? For example if you wanted to make a removable choke that could be added to or removed from either end of that antenna run (without using a barrel connector) then you might make a choke using a 5 foot piece of coax wound 11 times thru a ferrite core with an SO-239 connector on one end and a PL-259 connector on the other end. (There are lots of videos showing how to add PL-259 connectors, but very few videos show how to add SO-239 connectors.) Two (of the few available) SO-239 crimp connectors available that I am looking at are the Lands Precision crimps at GigaParts, and the MOOKEERF on Amazon.

Thanks Dave, this clears up a lot of confusion as to how to configure Radials.

I log all my HF and UHF/VHF simplex contacts. I use QRZ, LOTW, and a paper logbook. I've been a ham a little over a year and just filled up my first logbook. (One of the small ARRL logbooks. I like the small ones because they're just so convenient.) My QRZ log has 743 contacts with 456 confirmed. (All voice.) Pretty good confirmation rate, I think. 🙂 73! - KQ4CM

Very nice and informative. Thank you

I decided to make a dipole antenna that I could adjust to cover 10 to 20 meters. I decided to use two 25 ft tape measures. They were 1 inch wide. I know that the formula 468 /frequency is just a starting point so some trimming needs to be done. I soon discovered that the spots I wanted to be resonance was considerably shorter than my calculation and the bandwidth was fairly wide. I was using an antenna analyzer to find the lengths along the tape measure. KF6EWO