Відео

Hi Marty, already have your Mad Dog 80 and having great success with it in conjunction with Cha SS17 whip as well..ordered the Big Dog from you yesterday and I can see its already with Australia Post so many thanks for the quick postage your end,with luck I will get away with the customs again at the UK end…Still waiting for the SS25 whip to be sent out to me so will let you know how I get on when I can put the two of them together,cheers mate and best 73…Steve M7GWJ

I love the presentation, you showed us the way it really happens, and pointed out how to avoid problems. Well done.

Excellent work.

At 16 minute mark, please explain the bottom of the cap? Since you went past for the boring part you said is important to know, we know the braid part gets attached to the coil, but what exactly is connected, ground and center conductor? Center tap of the UHF connector to the tap? What gets connected to which part? You briefly showed the base, i request a photo of the complete base prior to screwing the cap to the pipe, please? 73 de N2OBS

Outstanding! Very good demonstration of the cold. I have one question: the second banana, plug, the one connected to the hose clamp. How is it connected inside the bottom clamp?

I am going to block this channel. Only use standard units of measure. No metric.

Bravo Marty .. another winner! Just need those 25ft whips to come down in price a little and I’ll be seriously considering one of these coils. 73.

Love that coil need to order a collar for the one you sent me.

Nice one Marty! Now to find an SS25 in stock somewhere! :)

wow, that's awesome

Thanks for making great products Marty; just placed my order!

Does the coil handle getting rained on if setup for a few days? Any corrosion issues? de WE0H ..

Thanks mate, very helpful!

nice job Marty , Tim in NY USA

Does it not matter that the hose clamp is contacting multiple turns of the coil wire? In other DIY coil builds, I see them clamping onto a single turn.

Thanks for this. You have answered my questions on counterpoise and it has helped get my Mad Dog working consistently. Frank VK4FEM

Just so I’m clear, new Ham here, I have the Mad Dog 40 and a Chameleon 17 ft whip. I leave the whip fully extended and then just adjust the collars (I have 2) on the coil? Thanks!

Anyone knows which magnetic mount is being used?

Great family of coils. Is the 80 meter coil limited to 80 meters? IOW, if I adjust the whip shorter, it it possible to tune 60 and 40 meters? How far up in frequency can I tune? *73 de AF6AS*

A 36:1 would surprise you

Outstanding work with the “Mutt.” Love your work, Brother. de VK2USA / AD7DH

I think, in general, your swrs look good Marty. A tuner will make your radio be even more happier, if needed. Good work there! I wonder if 64:1 would make any difference?

awesome work marty! de vk2moe

Good work Marty, I like tapping the toroid instead of twisting the end for the winding also it make a neater transformer and makes it easier to get the wire through the toroid.

Excellent work!

very nice station

great !!!

Thank you for sharing this.

Without doubt the best idea for home built variable loading coils. Thank you for this video! Rob, VK4SSE

Looking really nice. Can't wait to see the dingo! Love the name.

Good Evening, Maddog. Where can I order a 80m coil? Do you ship to Europe?

Hope to see that for sale on your site.

I like it!

The CAPAD download site is a moving target and has changed its layout since this video was made.

I bought a Reed 1-1/2” pipe threading die and threaded a length of PVC pipe. I wound coil on to pvc. The rest of my coil is built very similar to your coil. I put an 8 ft whip on it, moved hose clamp to top of coil, but when testing with nanovna, it is nowhere near tuned to the 10 meter band when the hose clamp is at top of coil. It is tuning around 14 MHz! If I move hose clamp down it tunes at lower frequencies! I cannot get it to tune at 28-29 MHz with 8 ft whip, which should be close to length needed.

Keep up the good work . Congrats !!

Gday Marty, Is their another common(?) antenna thread size besides 10mm and 3/8-24. I have an experienced amateur saying 5/16 extra fine thread is used on my antenna. Thanks Greg

Very great construction, looks very solid and durable. Could you please tell me what the outside diameter incl. the stainless wire will be. I wonder what will be the right size of the hose clamp? I see Frithys Rural shop also selling these. I see in you video that you're using 1.6mm wire, I found many 1.5mm wire on eBay, I guess that will work, only 0.1mm difference. You just got yourself a new subscriber. Best 73's de LA3DNA Leif

Does anyone inow of a source for the continuous threaded riser in the USA? I have not seen any source for it other than in Australia!

Hello Marty, I read your response to someone trying to tune 20,40,and 80 with three collars. You mentioned placing only one collar at the bottom . I did achieve a good tune on 80. My question is: using the 80 m coil and 17 ft whip can I get 20, 30, and 40? Thanks Thomas

Can you use copper wire? Would it not perform pretty much the same?

This looks like a well made product. I saw Walt’s video yesterday of him using the 40 version on a parking garage in VA. I ordered the 80 version with a few collars. Thanks Marty!!!!! KE2CQF 73

Thanks for showing us the Mad Dog "Chihuahua", its small but has alot of bite.

Thanks Marty! Walt(k4ogo) sent me over to your channel. 73 de kc5ngx

Золотые руки! 73

AWESOME JOB. THANKS FOR THE INFO. 73 KE7LGD SOUTHWEST UTAH USA. GOD BLESS 😇

Nice presentation Marty....Has anyone ever measured the efficency of these antennas on the various bands? Tried center loading vs. base loading? ... these are base loaded antennas. My guess < 5% on 80, < 15% on 40, < 35% on 20... a little better on 17, and up to 75% on 10... another critical factor to consider is the antenna base Z on the various bands... (about 10 to 15 ohms on 80) Years ago I used a toroid autotransformer to match the 50 ohm coax feedline to the +- antenna base Z for 80... worked great. One made of FT 140 52 (or larger) ferrite would be perfect.. you could also use the Fair Rite 2643251002 43 cores. Not criticizing.. just trying to help... done a lot of this stuff over the years. VA7AA/XE1

Hi Marty do you have any tuning data for the full coil and the chameleon 17 ft telescopic ? De GM0CQV

Just bought one. Looks perfect for a mobile station.

This is very interesting. Thank you but a note... What if you also tie the ground of the so239 to the bolt for the mag mount.. Wont that also use mag to couple to ground?