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Boy, it didn’t take the “Sad Hams” long to come out! Why anyone would belittle anyone or any group trying to do something good is beyond me. Excellent presentation and ideas. I’m in the process of coming up with something similar for our area. Small town with a few hams, but no club. And it’ll probably stay that way. But all responsible for the wellbeing of our community. I was thinking along the same lines with the equipment, a few differences because of no financial backing. On antenna’s, I was thinking of the same j pole, an end feed, and a vertical. Was happy to hear your thoughts and ideas.

The last thing professional emergency personnel need is having to take care of a bunch of old, overweight, out of shape guys with radios, interfering in professional emergency operations. Please stay home and play with your radios.. leave it to the pros..

While it's sort of understandable why organizations like this build go-boxes, I'll be perfectly honest in saying I think go-boxes are, in almost every use-case, an absolutely horrible idea. I'll give you three reasons why: First, every go-box project I've ever seen takes a perfectly manageable amount of kit and weight, and immediately turns it into a two-person lift. Second, that perfectly manageable amount of kit and weight that one could walk with, once placed in a transit case, is only transportable by vehicle. Third, all that kit always looks super squared-away and dress-right dress in a transit case: gathered and velcro'ed wires, inputs run on the opposite side as the outputs...an engineer's wet dream -- until the first time the operator has to troubleshoot a problem. Relying solely on generator power is not a recipe for success, either. Generators require gasoline of propane (... or diesel): this will almost always be problem in a disaster. Also, generators require maintenance at every short intervals -- many small generators require service every 100 hours, for instance.

Great presentation. Was solar charging of the batteries considered? Relying on gas generators has its own set of problems (fuel, noise, RF interference, maintenance, etc) .

Is there a list that defines all of those satellites?

Very nice presentation.

Well done Ted. Keep modeling, experimenting and discovering what wonderous things we can do in physics. 73 OM

thank you. I am a hospital security officer and I really want to get into emergency management so this was really a well put together video.

R&L electronics sell official VNAs so that's a trusted source in the USA. Currently the best VNA I've found for the price is the Libre VNA $550. There are some cheaper ones like the Lite VNA 64. It's decent & often for most ham radio needs sufficient. The dynamic range is basically what you end up paying for in VNAs. Good video & thanks for sharing. 73 N4FOX

I always thought this would be a fine band to pull out the old tech. Build a tube cw transmitter with high and low pass matching L networks. Then you wouldn't have to worry too much about the matching to the antenna either. Thanks for the video!

Andy, thank you for posting this and helping bring attention to 630 meters. There is going to be an operating event on 630, starting at 0000z November 3rd 2024. (Saturday Evening for us here in the States.) We'll be using C.W, / FST-4 (60 seconds) / RTTY /JS8call and even SOME SSB. The RTTY/JS8call/SSB generally above 476 Kc/S. (C.W. 474.2 and down.) FST-4 is our equivalent to FT8, and is Dial Freq 474.2-DF +700 up to +1350 or so. (WSPR generally +1400 to +1600). Hope to see you there. 73 de N2VJ.

The best presentation so far on this subject.

ruclips.net/video/rp41jlNE47E/видео.html

At 9min 45 seconds: I think the capacitor is to bring resonance up in frequency a bit on 40m; I've used this technique to good effect on other OCFs. The capacitor is at or near the current anti-node on the lowest frequency. Because of its position and value, it is almost negligible on harmonic frequencies.

Hi, Thanks for the information video presentation , I need to buy a Nano Vector Network Analyzers (VNA's) , I need to use (20mhz to 5Ghz range) .Would you please advise which model I can use?.

How are you using DX Toolbox on the Mac? Are you using Wine or something like Parallels?

Anybody? I'm tripping over the terminology "Balun vs Unun" when it comes to OCF's. This video @11:25 shows a Summary reprint of a 1988 QST article on OCF's and the transformer is identified as a "4:1 current balun". I learned to respect without question the tech stuff in QST but is their use of the word "Balun" is a poor choice of words or am I mistaken? I'm in the midst of an OCF install. My wire is up but my 4:1 Balun /CMC choke combo (copied from TRX labs on RUclips) complete. swr's bad when up in the sky. On the bench with 200 ohm it's wonderfully flat 10-40m. Should I rewind the balun section of the TRX Lab's design to be a proper 4:1 Unun?

sound eventually is fixed and doesn't echo so keep listening and it gets better. Thanks for sharing this ive been curious about this for a while. And curious how I would even get on that band?

Like Ted, I'm a big fan of OCFDs. I'm often asked to help other hams with theirs. And I've abandoned the 1/3-2/3 split long ago. Anyway, I'm always surprised at how many hams not familiar with how an OCFD works that think they can trim 40 meters by adjusting length of the long wire, and adjust 20 meters by adjusting the shorter wire. This is NOT how an OCFD works, you can not adjust bands individually like with a fan dipole.

This is a splendid presentation. Thank you for sharing the video.

Educational

thanks

Thanks for the presentation and another great video Cliff. Keep the good job. 73.

really nice setup and wonderful organization of cables and setup. Thanks for sharing.

at 16:45 or so you mention a big hole and should be sealed to keep bugs out. They make a rubber boot for coax that will clamp on pvc pipe. Google "Site Pro 1 Boot Assembly Kit" they make them with various number of holes and sizes for various coax and hardlines.

The NANO VNA is a great troubleshooting tool when trying to isolate cable faults at existing AVDL and cellular sites, either on turn up or on a trouble call. We quickly verify where the fault is located, correct it, and when the fault is corrected and all the antenna lines look good on the Nano VNA, then we call the tech with the Anritsu SiteMaster, FieldFox or similar to do the sweeps for the customer turn up package.

Presentation is important, not the presenter. Wrong balance.

Like the talk. I learn so much that I might need to make one of these…

Great view.

he was trying to bring his concience back to another body okay?

ENEMY CAN SEE YOU FROM SKY OKAY?

They Could never get back?

He was in a corner of an auditorium trying to get back before the rapture.?

THERE IS NO WAY EVERYTHING IS RFI YET.

Great video! I look forward to getting more involved!

Excellent talk!

Are these in Magnetic or True for 45 degrees and 150 degrees?

Fantastic presentation! Very informative. 73

Can't hear what you are saying. Audio terrible.

Trying to get a grasp on DMR. Can you go to any frequency? I know TX will be limited to radio hardware but can DMR's listen up to the 900 Mhz range?

Will this work for tuning a self made 1/4 wave 1090mHz for ADS-B plane spotting?

Great video. Thanks for the primer on the Nano VNA.

Doug, you speak well and had a very nice presentation. Thank you!

Excellent presentation. Some great wisdom gems from a guy who is really at the top of that game. Congrats on your 2021 Florida record, Jim. See you on the air. 73 - N5OT

Excellent explanation of the OCFD, my main QTH antenna. At school, the x-axis went left to right, and the y-axis went up and down. I'm in the UK. Thank you for the presentation.

Great introduction in plain language and several good stories. I'm from Chicago southwest, and EMI/RFI is rampant in the area.

Awesome video. Incredibly informative.

FRS is license by rule not a paid service or a lifetime license as was stated.

Dear sir, thank you for this video. I have been very interested in OCF antennas, making them in particular. Your presentation was helpful. It is embarrassing that the ham world has its share of negative commenters. Please ignore their sad efforts. Best wishes from S.E.Tennessee, 73 KQ4IXD

Most catalog items I have seen are very very bandwidth intensive, need some text based info