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Right now, the submission tool will not filter out different grids, but it's a great idea.

Super nice explains, 73 HP1GDS

Hooked on phonics worked for me LOL :). just bought my first key and need a cable and adapter to plug into my radio. Once I get it im signing up at cw ops

Presenter needs to re-do this presentation with their slide software in Presentation Mode so we can actually read the writing on the slides!!!!!!! Why has the host not insist this be addressed!?!?!?

I think I will be watching this again... or a few times. Thanks for the wealth of knowledge. de ki7cia 73

Fascinating presentation in all respects, thank you very much!

Thank you for the chemistry lesson / deep dive into HOW the ionosphere works. I enjoyed this very much! 73 OM

Very interesting and informative presentation. I actually learned something new about propagation. Thankyou

Very nice presentation!!

I'm a bit confused. If I have a connector on both sides of a current balun, doesn't the connector to the long side of the coax take away the effect that you want? Thanks for the great video.

A comment to help boost the RUclips algorithm!

@42:30 - We need to stop misquoting Part 97 to imagine gray areas which are not there. Under "prohibited transmissions" in 97.113(4), the wording is, "messages encoded for the purpose of obscuring their meaning." That exactly describes encryption. There is no exception for encryption applied by an agency before you got the traffic. If an agency says they can't use hams if we can't send encrypted traffic, then we need to build them a Part 15 system that can. I'm the EC in my county, and I make sure in my initial pitch to government, hospital and NGO partners that this limitation is understood upfront. It has yet to be an issue.

Thank you. HArd to get things done. People depend on cells and when it goes dark not fun. Every year we see this from extreme natural events.

Fantastic video

What voltage have to be the capacitor, 50v? what wattage the resistor? 1/4w?

go on with your work OM!

very practical to know.. thanks!!!!!

Excellent tutorial. Far too many only measure the SWR and omit any thought to the current in the line. There was a time when the OM would use an RF ammeter and slide it along the balanced line with a stick to take readings at various nodes. When we changed over to coax, many of the basic skills were lost. This presentation is most important for todays ham and to (hopefully) understand some of the physics that goes on in a common transmission line. 73

This is a fabulous resource! Thank you so much for assembling this archive and getting the word out. As a historian who became an amateur radio operator in 2019, this is precisely what I've been desiring!

Awesome!

Rather than going on and on about SWR on each band, I would like someone to cover radiation pattern on each band.

I’ve been using a K6MM helical 160 vertical for several years now. I hang it using a halyard from an overhanging branch of a very high crowned oak tree over an 8 foot above ground elevated feed point and 18 elevated radials 14 35 and 4 70 foot elevated radials also nominally 6 to 8 feet above ground. I use capacitive shunt matching at the feed point (2000 pf) and get a near perfect 1.1 match at resonance. I can set the resonant point anywhere in band simply by using a small tappable series coil in series between the bottom of the antenna and the feed point. The high Q of the system only gives about 25 kHz bandwidth where the SWR is less than 1.5/1, so it’s absolutely necessary to have the ability to move the sweet spot around the band! The tappable coil can simply be made by adding turns to the bottom of the antenna with a female bullet connector attached every 2 turns. Just tap the incoming center conductor of the feed line up or down the tappable coil to increase or decrease the frequency of the sweet spot. 73 de AJ1G Stonington CT

Very awesome! Sadly I couldn't find any issues archived of S9 CB magazine edited by .y friend Tom Knietel KGB4303, WB2AII . Wrote an article with my dad published in about our building a Knight Kit FM monitor receiver.

Athens Radio Club (Georgia) loves DLARC.

Very cool! I will check it out. WG7D.

Thought is was Andy Reid from a distance on my phone

Visited it several weeks ago, great collection, useful for techno-cultural historical research as well as reviving old invention.

That reminds me...I had asked if you wanted a collection of old service manuals on microfiche and never got a response. I'll have to get back to you on that.

I had to laugh at the old Reese's commercial as I am sitting here eating Reese's ice cream. I'm one of those old guys who can say he was on the internet before it was the internet. Used Arpanet and Usenet back my Army days. Used to connect to a DEC 2060 mainframe from a Franklin Ace 1000 (Apple IIe computable) on a 300 baud manual connect modem. Appreciate finding out about the Library. 73

Thank you so much.

So mind blowing to know this kind of archival work is going on. It will be an immense treasure trove if we survive long enough in order to be able to indulge in it. Great work. (Sub).

I love the old radio magazines. thank you for sharing. 73, Luis CU2IJ

Amazing work - thank you so much for sharing 👍🏻👍🏻 OZ1LAV

Yes, this is awesome. I found my AR mentor from 1969 in an old Callbook, now SK. Gone but not forgotten. He homebrewed all his gear except his Heath Two'er. Next I'll search the ARC Newsletters for the Las Cumbres ARC, K6FB Summit Sentinel that I published for the club for a year in the 1980s.

Thanks for sharing. VK6ADA

this is really good. I just finished my 300 400 courses and this helps me apply it to my comms side

I know I’m going to get some pushback on this, but here goes. I passed my Extra in 1980 with the 20 WPM requirement, but I didn’t actually use CW for decades (42 Years!). I only got back into it about two and a half years ago (today being January 7, 2025). When I started again, I had completely forgotten the code and had to relearn it from scratch. I had trouble with sending at first, especially using a straight key, so I switched to a paddle. Here’s the problem I encountered: when sending slow code (QRS), senior operators would easily detect my “newbie fist,” and I didn’t get many replies to my CQ calls. So, (and I know this is where the pushback is coming), I ended up buying a keyboard for CW. The beauty of the keyboard is that it sends perfect code, and suddenly I was getting a lot more responses to my CQ calls. That helped me get more practice and quickly increase my speed. I used all the online tools, and it took me about 18 months to get comfortable with ragchewing at 18 WPM, but I hit 13 WPM in just 3 months. That last 5 WPM was a real challenge! Now I’m at 20 WPM, but I don’t yet ragchew at that speed. People say that using a paddle will help you learn faster, but I think the key is having fun with CW and making as many QSOs as possible. And for me, using the keyboard helped me do just that-I got more QSOs, which made it more enjoyable and gave me more practice. Today, I can use the paddle, but I still switch back and forth depending on how long the ragchew is. CW can definitely work for all the DX you want or POTA activations, but for learning, the goal is to have QSOs. And rag chewing is the best way to do that. It’s going to take at least 3 months to get to 13 WPM, but that’s how I did it-and it worked for me. (Also, for the newbies, work the old Navy Ops, they are great. Nice spacing, great fist...You will find some operators have excellent fist, meaning spacing, and clarity of the letters... Is it worth it? Well, I have to say, without a doubt, yes, it is Ham radio is CW...(And for you FT8 fans) think of it, with the same abilities just with a QSO (Conversation) DE NN2X / Tom

Great bio, amazing historical backdrop, fascinating talk....

Thanks

Nice job sir. KK9ZZK

Good content gentlemen. Many thanks. 73

Miss Electra is a very cute cat! (59:30). Very informative video on the EFHW antenna. Thank you for posting! (73's, WA4282SWL)

@2:55 and @13:25 Why do you keep saying it wrong? At least you realized but this is not something I would expect from another Extra Class ham - It's TWENTY TWO HUNDRED and NOT TWO TWO TWO ?!?!? Excellent info and super helpful - thanks for producing and sharing!!!

Thanks for sharing your expertise. VK6ADA

Great presentation! Even though I’m familiar with the program, I always learn something new. W1GRL and W1BOY will enter updated submissions on January 1. Thanks Mark!

Great show! You reminded me of many things I’d like to buy. One gift I thought of is time. My husband (W1BOY) and I (W1GRL) take turns with contests and large blocks of radio time. It’s the best gift when one of us says to the other, “I’ll take care of food and snacks, you can operate all day.”

Great show, thanks.

Nice thanks!!!

Great presentation.

I have watched a few EFHW videos over the years and I can say that this is the most accurate one I have seen. I believe I can say this as the original lumped element EFHW design was done by me in 1999 as a result of wanting a simple antenna for hiking. I began marketing them in 2000 under the trademark name EndFedz. The Z was my homage to the antennas used on the Zeppelins. The end fed design was an offshoot of my On-Glass half wave antenna Patent used in commercial two way mobile installations. The first designs were monoband and used an L network for matching. In fact if one wishes to use the antenna on a singe band, the L network is a more efficient matching network than is the ferrite transformer (it is NOT balun BTW, it is just a transformer). Around 2002 I designed the current 49:1 transformer with the shunt capacitance, as Ward properly says is there to reduce winding inductance that begins to upset the Return Loss above 15M. By 2010 orders were becoming larger than we could handle and yet still retain our military and aerospace clients and I sold the line to LNR Precision. At that time, we were still the only ones manufacturing EFHW. LNR eventually sold to Scott at Vibroplex when LNR decided to go back to selling only QRP radios. I guess imitation is the best form of flattery. BTW, way back in 1999 I asked a trusted ham friend if he thought the EFHW design was worth manufacturing. His answer was "No, I just don't see it going anywhere". Dale W4OP PAR Electronics, Inc.