HF Multiband Portable Vertical - Mad Dog Coil (Ideal for POTA, SOTA)
Вставка
- Опубліковано 20 лип 2024
- I wanted a way to get on the air quickly when operating HF portable.
Introducing the Mad Dog Coil - an alternative to a Wolf River Coil. Simply attach your antenna whip/wire to the top bolt, adjust the collar on the coil, connect radial/counterpoise wires to the ground socket, and you're good to go!
Get one here 👉 maddogcoils.com.au/
Wallaby Batteries 👉 geni.us/KQMOgi
⏱️Chapters⏱️
0:00 Wolf River Coil alternative
0:29 Introducing the Mad Dog Coil
2:27 80m and 40m versions
3:52 Additional Collars
4:42 Installation/Setup
6:16 SWR Tuning
7:52 Doh!
8:31 On Air
12:00 Amazing contacts!
13:19 The Mad Dog himself!
14:00 80m Coil & SWR Test
14:32 Multi-tapping the coil
15:26 Versatile options
📺 Watch the next video here 👉 / @hamradiodx
➡️Some links are affiliate and I may receive a small commission on sales⬅️
💰 $15 OFF at Radioddity - radioddity.refr.cc/haydenvk7hh
📘 20% off Ham Radio Prep Courses - Use Coupon HAMDX hamradioprep.com/
💵 GET 5% OFF Messi & Paoloni Coax - Use Coupon: VK7HH messi.it/
🚀 Support The Channel 🚀
💸 Patreon: / hamradiodx
📺 UA-cam Memberships: / @hamradiodx
💲 PayPal Tip Jar: www.paypal.com/donate?hosted_...
🛒 Buy Ham Radio on Amazon & eBay: geni.us/HamRadioDX
👕 Merch: hamradiodx.myspreadshop.com/
🛒 Amazon Store: www.amazon.com/shop/hamradiodx
Join our TOADs Community 👉 / discord
➡️Contact⬅️
🌏 Website: hamradiodx.net
📱 Facebook: / vk7hh
📱 Instagram: / hamradiodx
📱 Twitter: / hamradiodx
📧 Email: vk7hh@hamradiodx.net
📮 Ham Mail: Hayden Honeywood - P.O Box 5071, Sandy Bay 7005, Tasmania, Australia
#HamRadio #AmateurRadio #antenna
Music:
UA-cam Sound
Bensound: www.bensound.com/royalty-free...
Epidemic Sound: www.epidemicsound.com/ - Наука та технологія
Get one here 👉 maddogcoils.com.au/
Wallaby Batteries 👉 geni.us/KQMOgi
Charger I Use 👉geni.us/XoAXAN
Find out more about POTA 👉 ua-cam.com/video/VCyoYBT8kuU/v-deo.html&ab_channel=HamRadioDX
Looks great, Hayden. Good to see an Aussie product go to market.👍
You got that video out fast 😂. Fun hearing my call. I’ll be playing around with home made coil base on Marty’s generously given instructional video. Cheers Lance VK6LMK
Great deal for USA buyers. Was looking at the new Chameleon coil before I saw your video. Just ordered a 40M with 2 additional taps and endcaps... shipped to us for $99USD
We were building these back in the 70,s. Two inch PVC. Then used a number 10 wire cut the length of a quarter wave at 80 meters. Marked the wire for each band on a quarter wave 6 meters thru 80 meters. wrapped it around the PVC and added a ground for the counterpoise . Then plug in the coax from the transceiver. Tap the coil for the band you want and transmit. So simple. Oh ya forgot the 102 inch whip. Or whatever length you want. Use small stainless screws for each band into the wire on the coil. Most of the time I didn't need a tuner. Back then that would have been a manual tuner.Actually since it is a coil you really dont need a tuner. So I would make a Shunt coil 1 inch wide wounds. Add that to the coax center lead and to ground. Done, no need for a tuner. The 2 inch PVC helps to give some bandwidth. Used these coils for my long wire for 80 and 160 to add length and bandwidth . I would say now days would be build for $80 ish bucks depending on how much of this stuff you already have. We are hams and we build neat stuff.
Great to see the mad dog coils review and you making some QSOs from a park.
I think parks are my favourite type of radio activity at the moment.
Great to see the 7300 got an outing as well.
I appreciated the extra power from the 7300!
Great video as usual Hayden. Also a great antenna build great work Marty.
Thanks for watching Lindsey
@@HamRadioDX Hi Hayden, just on a side note, could you tell me what charger you are using for your Wallaby Lithium Ion battery and where you purchased it?
@@lindseycampbell5531 Hey mate, I have this one - a Victron. Got it off eBay - geni.us/XoAXAN
Got one coming in the post this week! May very well be my foray into the HF world! Thanks again for a great video Hayden! - Dan VK4DNO
Awesome Dan! Hope to work you on HF soon
@@shaunstapleton Gday Mate! Long time! How have you been? :) I will have a tune around if I'm home after work once I'm set up. I'm going to assume it's noisy AF around where I live in Brisbane, but I'll give it a shot.
For sure mate! @@HamRadioDX
Love that @@shaunstapleton! Hopefully chat on there soon all things going well! I will find a way! :D
thanks great detail and review much more info from you I've found after watching maddogs videos
No guesswork tuning if you use a steel rule to measure from the top winding down to the slider and record the settings for each band. Quick and simple.
Top notch looking antenna there. Great video!
Yeah it's pretty neat Shane! Thanks mate
Great video as always Butterfield
Thanks RingChest
Great video Hayden bro very informative 73
Thanks Andy, glad you enjoyed it
An "out-of-the-park" ⚾ tutorial!
I bought an 80M metric version after watching your video, Hayden. I'm hoping it will finally allow me to operate HF from our boat on the Gippsland Lakes - its not a yacht, so doesnt have a mast available.
After it arrived, I recalled that I have a few old whips in the shed that might also be usable with the coil, although they have imperial threads. However, the thought of having to also buy the imperial threaded version of the coil didn't appeal to my Scottish genetic base. I did get the 3/8 24 NF coupler nut though and discovered that the 3/8" threaded hole in it was very close to the diameter hole required for a 10mm tap. A few minutes careful work with such a tap transformed half the depth of thread in the coupler nut to 10mmx 1.5mm. A relatively easy mod that now allows me to use imperial threaded whips with my 80M coil.
Bill VK7MX
That's awesome Bill. Please let me know how you get on with operating it on your boat - and let Marty know too he's keen to hear how it performs. There's a few of these appearing in the wild now.
Will do Hayden, but I wont be back on the boat now until early December. I did try the VK7JJ squidpole a couple of years back but it wasn't easily deployed and the wind played havoc with it.@@HamRadioDX
Those sunglasses - like a movie stah. 😂 Great video thanks.
Haha! 😎😎
Good video as always, thanks. When using the second collar for 40m, does that not detune the 80m setting as it shorts a number of coils, or does it only touch one coil?
No it will have limited effect on detuning. If you switch back to 80m, you still have the same inductance (windings) to the end of the coil to antenna connected
Great vid Hayden. I’ve ordered the 80m (Metric), so looking forward to receiving this week. As aside, do you earth the IC7300 when operating portable? Cheers Dave
Hi Dave,
No I don't earth or ground the IC-7300. I just run the counterpoise out on top of the ground
Hey Hayden, Could you adjust that tapping ring to work on 10, 20 and 40? Cheers, Peter Orbe. (noob)
I can see the point of this for 80m but for 40m a 10m squid pole and wire with the same counterpoise is less compromised more efficient?? …. Though perhaps marginally more difficult to set up (unless it is very windy)? Great to see an Aussie in the antenna space though… I’m sure it will go MAD and sell by the truck load for hams in a hurry as the tuning is quick and doesn’t involve capacitors so it can take more watts up the spout!!! So …. Maybe …. I take back my 40m comment due to the ease of tuning!!! GO MAD DOG!!! 73 de VK2AOE .
I have thought about getting an amateur radio license. I have always enjoyed the radio hobby as a listener. I have done lots of radio related service and repair. But, I have never transmitted, save into a dummy load. But alas, the entry level license offers very little HF privileges. It does not even offer all of 10 meters. Of course all analogue modes are allowed from 28.3 to 28.5 Mhz. But, it would be extremely unlikely to get a response on 28.455 Mhz if I sent out a CQ on FM. It is not illegal. But it is just not conventional and would likely anger some operators. There are unlimited privileges from 6 meters to infinity. But HF is where my interests happen to be. Thus, I just remain an unlicensed hobbyist, preparing, building, reprogramming, modifying, and installing, radio equipment and peripherals.
Just saw your video on mad dog coil just wondering on the tripod would like a adjustable tripod but am wondering what type do i need to look for do have a Camera tripod but obviously has different top has a camera slide in base to it and does not seem to have a screw in section small enough to screw something like this into do i look for a speaker tripod or something else?
Hey mate check out the Mad Dog coil website, details on a suitable tripod there
actually went there after video and found out what i was after thanks should have gone there initally
@@HamRadioDX
Great video !!! one question where to buy in China this telescopic antenna? Can you share ? In AliExpress? Many thanks Marcelo from Brazil 🇧🇷
Check out Aliexpress yes.
The mad dog coil website has other options listed
Wonder how this would work mobile operations on a vehicle.
Hi Hayden, wonder if mad dog will make a 20m to cover 20-10m?
If you use the telescopic whip on the 80m and 40m coil you can tune 20metres I have built one using Marty’s video. By thanking the collar to the top of the coil and shortening the telescopic whip you can tune 10 metres. However if using the military style sectional whip I haven’t been able to tune 10 metres.
Have you considered a future in sales? =)
Nope.. maybe I should
What's that tripod mount at 1:07?
Nevermind, you show it right before 5:00
So I assume the videos on his channel are gone now? I have a better one that a Swedish designed and my mate 3D printed it for me. Edit but for $100aud that is a good price.
The videos are still on his channel. Check out his website
HERES A DUMB QUESTION WHAT HAPPENS IF U CONECT 2 COILS TOGTHER
Not a dumb question.. more inductance.. I want to see if it tuned up on 160
it would be a interesting experiment putting either 2 of the same coils together or join one of each together @@HamRadioDX
Loading coils for verticals have been around for many decades, nothing new here. Your problem is laying out ground radials and he hazard of someone tripping on that wire. This could have disastrous results for POTA. Use your vehicle as a quasi counterpoise or a single wire you can monitor. Or better yet, get something safely in the air above other users of the park.
No problems. I can safely monitor foot traffic in the area.
Vehicle parked too far away. All completely safe
Interesting except for using a BNC to attach coax. I would prefer an S0-239 to fix a PL-259 Coax. No one in the United States is going to want to use a VHF BNC.
BNC is great. Quick disconnect perfect for portable. My Buddipole uses a BNC too and it was Made in USA 🤔
NICE!!! THANKS !!! de US4ET Victor. 73 !!!!!
Were you running 100 watt for this test ?
Nice Work ⚡🙏⚡
Is it simply a coil?
or is it a patented inductor design
with a nuance ?
Nice set up either Way 🙏
I hope to see some innovation using conical coils
with reduced stray capacitance
or even pancake coils for greater efficiency and higher Q factor.
Conical and Pancake are more efficient coils
than the cylindrical continuious helix coils,
just based on the laws of Induction.
In the Early Days of Radio,
Pancake and conical coils were widely & wisely used ⚡🙏⚡
Keep up the great work with your channel Hayden mate ⚡🙏⚡
73 from Crazy Ham.
Yes I started out with 50W on 40m for the first few contacts and then cranked it up to 100W
@@HamRadioDX Excellent Mate ⚡🙏⚡
Looks like a nicely designed little system 💪
Might order me one of these. Only about $108 USD w/ Shipping. 73 de W6OBB
Hi from 7Z1FA/ST2KI
G’day!