![G. Scott Davis](/img/default-banner.jpg)
- Видео 21
- Просмотров 3 010 533
G. Scott Davis
Добавлен 9 окт 2010
Comparison of EFHW-8010 to 40M dipole from MD to Georgia
Scott, N3FJP on 40M sloper dipole followed by Dean, KA3YJM on EFHW-8010. Dean and I are in Maryland and recorded by Larry, WA4YTG in Georgia. Den and I are both running about 450 watts. The EFHW-8010 is only down a few dB from the dipole. Dean's antenna is roughly 35 feet above ground, surrounded by higher terrain.
Просмотров: 7 063
Видео
2016 February School Club Roundup
Просмотров 5248 лет назад
I'm having lots of fun working School Club Roundup stations on Amateur Radio this week! Elementary, High School and College students across the US and beyond are getting on the air, learning about radio wave propagation, building effective antennas, electronics, technology, geography and more! Many of the stations are using my free Amateur Radio School Club Round logging software! Here are a fe...
Wire Full Wave Loop & Dipole @ 90 Degree Orientation from Each Other
Просмотров 2,7 тыс.9 лет назад
Comparison of Loop to Dipole - comparison at 90 degree orientation. With the exception of omnidirectional verticals, just about all antennas are directional. What we are referring to here is not just an antenna that radiates in one or more particular directions, but the ability to actively and usefully control the direction we want our antennas to radiate from our shacks at any given moment. As...
Plans for 8 foot high, 15 foot wide Clematis Wall
Просмотров 3,7 тыс.10 лет назад
What we hope to accomplish is to create an 8 foot high, 15 foot wide wall of beautiful clematis. There are six, different colored clematis planted under the fence, which is held by two 4 X 4's. The 4 X 4's are placed in vinyl sleeves and cemented in the ground.
Reasons for Hope - Creation
Просмотров 1,3 тыс.10 лет назад
There are a number of reasons for the hope that is within me. Taken collectively, they present compelling evidence for the Christian faith. This first video looks at the creation of our universe - the miraculous materialization of something from nothing. Lord willing, I will be adding more videos that cover sound reasons for believing in the existence of God and the resurrection of his son, Jes...
Faith in Frames - Meditative Moments, Nature's Praise!
Просмотров 95611 лет назад
God's creations are amazing! Lovely sunsets, intricate, wonderful creatures and breathtaking scenes, carefully woven by our heavenly Father's hand, display his power, his majesty and his glory. They inspire, motivate, encourage and renew us. Here is a short video, designed to provide a break from your hectic day so that you can find a few moments of renewing peace, calm and meditation. We hope ...
Simple Squirrel and Raccoon Barrier for Bird Feeders
Просмотров 145 тыс.11 лет назад
I like feeding the birds and the squrrels and raccoons are welcome to what is on the ground, but I got tired of them climbing up and eating all the feed overnight. The baffle stopped the squirrels, but the raccoons climbed right over until I added this quick, easy, inexpensive solution!
Super Simple, CPVC Solar Hot Water Collector
Просмотров 1,8 млн12 лет назад
A very easy to build, inexpensive, CPVC liquid (hydronic) solar hot water collector that you can use to heat your home or for domestic hot water. This collector is significantly outperforming my pex collector in testing so far. Enjoy free heat, courtesy of the sun!
Fear of Flyin - Words and Music by John Scarborough, Photography by Scott Davis
Просмотров 77613 лет назад
Words and music by John Scarborough. Posted with John Scarborough's permission. Photography by G. Scott Davis. Recorded in my basement - Lighthouse Studios. Photographs taken in Harford County MD and Chincoteague Island, VA.
Designing the Ultimate Solar Hot Air Collector!
Просмотров 240 тыс.13 лет назад
This video summarizes and rates several solar hot air collector absorber designs including the black box, backpass, vented soffit, double layer screen and aluminum downspout. It explains the importance of considering airflow, along with temperature rise, when evaluating a collector's performance. It also details the side by side testing methodology to determine which designs work best and gives...
Heat Absorber Temperature Without Glazing
Просмотров 34 тыс.13 лет назад
While I was working on my panel, I noticed it was still putting out over 110F of heat, even with the glazing off, on a cold and windy, 40F day. I decided to use the IR thermometer to see what the temperature of the glazing was at 12 different points.
Solar Projects, Big and Small - Narrated Version
Просмотров 95 тыс.13 лет назад
This video is similar to the one I just posted, except that I also provide a brief, narrated description for many of the images shown. A variety of home built, solar heat and solar hot water, DIY projects. These are projects built by members of our Simply Solar e-mail group. There are lots of great reasons to pursue solar, but, among the very best reasons, building solar projects is very intere...
Solar DIY Projects, Big and Small
Просмотров 23 тыс.13 лет назад
A variety of home built, solar heat and solar hot water, DIY projects. These are projects built by members of our Simply Solar e-mail group. There are lots of great reasons to pursue solar, but, among the very best reasons, building solar projects is very interesting and really fun! There are lots of folks who are excited about solar, enjoy sharing their projects, learning, brainstorming, exper...
Airflow Balance Demo - How I'm Balancing Airflow Among the Three Collector Bays
Просмотров 8 тыс.13 лет назад
This short video demonstrates how I can fine tune and accurately balance the air flow through my three individual bays of my 12' X 8' hot air test collector using the voltage output of computer fans.
Proposed Method for Monitoring Relative Airflow & Balancing Among the 3 Bays
Просмотров 3 тыс.13 лет назад
The hot air test collector will have three identical bays. For the output temperature comparisons to be meaningful, the airflow has to be identical, so we need to come up with an easy way to do that. Here is one method.
Big, 24' X 8' Solar Collector Using PEX Tubing - Step by Step How to Build
Просмотров 153 тыс.13 лет назад
Big, 24' X 8' Solar Collector Using PEX Tubing - Step by Step How to Build
Aluminum Downspout Hot Air Solar Collector Construction
Просмотров 290 тыс.13 лет назад
Aluminum Downspout Hot Air Solar Collector Construction
Solar Introduction 101 and Solar Tour
Просмотров 42 тыс.13 лет назад
Solar Introduction 101 and Solar Tour
Looks like it would work good. How's it doing keeping out the bears?
Squirrels, armed with cutting shears, will come in the night.
This great idea worked for over a year ...until last night. Over time, raccoons kept attempting to climb, flattening the metal against the square pole enough for them to make the full Olympic climb to the top - as evidenced by the muddy paw smear marks appearing higher and higher up the pole. I will now try a wider piece of flashing for a wider, rounder baffle with lubricant and see how that works. But I have to admire the sheer determination of these little furry engineers sustained over an extended timeline.
Spray it with PAM
Hi, thanks for the clips. I saw your solar thermal videos, I have a question: during the winter nights when it's below freezing, or in a snowy day, do you have to shut the water off so the water won't turn into ice and break the pipe?
Do you have a video of you installing squirrel baffle?
I'll have to try that. Thanks.👍
Very good idea. I did something similar with a 6" x 5' long galvanized steel duct pipe (snaps together at locking seam) for $12 from Lowe's. And screwed it to the post near the top. You can spray paint it any color you like to make it blend in. You can also use a 5" diam duct pipe by knocking a very little bit off the 3-5/8 x 3-5/8" post corners to make it fit.
I am doing this now. Cheap and easy. Painted my black
Brilliant! I'm definitely doing this.
Is that 2 pieces
Spray the bottom with a dollar store brand of Pam (cooking oil spray) it’s totally safe for all animals and gardens very funny to watch them “try” to clim up!! If they do manage to get even half way they glide back down sliding the whole way it makes it very slippery! Stay well all 🙏
How does it hold up after these years? Can you please give an update? I need a fix for the raccoon and squirrel problem in my yard
Thanks! Looks very nice. I like the golden color paint -- blends in with the natural background.
So how did you put it up? Would love to see the whole tutorial.. How does it stay up and not slide down?
Great! Really loved this. Scott...great lead guitar. 73, George K2WO
Thank you!!!!
This might be just what we need. Thanks for posting
Thank you
Should have had a video of them trying to climb up 😂
Great low cost suggestion. Raccoons and squirrels no longer a bird seed problem.
I love flying great bass rips
Thanks for sharing.
I’ve been looking for a solution to defeat a raccoon from climbing our gutters; they cost us $4000 recently by getting into our attic via the gutter. This is an inexpensive and elegant way of defeating a raccoon. I will have to give it a try. Thank you sir for sharing!
Last year, a raccoon that got into our attic cost us $4000! I've been looking for a solution to prevent future raccoons from climbing our gutters. Thanks for the inexpensive and simple solution!!! I will try this out before it starts to get cold and the raccoons wants to rent our attic.
My step ladder is missing....I don't suppose....nah, couldn't be. 🤔 🐼
Squirrels and racoons have to eat also you smiling Ed Bagly Jr looking bafoon!
motion activated grenade launcher, but it does do a number on your grass
I wrapped the pole of my bird feeder with the same aluminum flashing but something is still going right on up and cleaning out the feeder. Now what?
Veggie oil on the pole and cayenne pepper in the feed . Pepper won't hurt the birds , they don't have salivary glands.
@@ezrabrooks7785 Motorbike chain oil is thicker. Also, if you make the baffle 'wobble' -- make it free hanging around the pole, raccoons will find it difficult to balance while climbing -- there are many videos about such 'wobbly' metal/PVC cylindrical baffles.
The aluminum flashing works 100%. Also spray it with a little silicon to make it slippery. Already we have seen 15 failed tries by squirrels with no success at all.
thank you for the idea. It's inexpensive enough to try and not worry if it does not work for me.
Thank you so much! Using this on my house posts!
Please, for all the people saying they use oil, grease, AmorAll on or near a feeder pole, please STOP. The birds WILL get that on their feet, and it will end up on their feathers and make it so they can't fly well... or fly at all. This is dangerous for the birds. Most birds will grasp and cling to the feeder poles, and whatever you put on there WILL get on their feet and feathers.
Variation of this: 4x4 post, & use a standard 5' section of 6" diameter stovepipe ( space is too narrow for squirrels to crawl up inside). Tap 2 holes opposite each other near each end of the stovepipe. Anchor in place with exterior drywall screws drilled into the center of the corresponding flat post face. The tapped holes should be slightly larger than the screw diameter, & I suggest screws 3" to 31/2" long, both suggestions to prevent pulling the stovepipe up against the post. Measure (or just eyeball) the spaces between stovepipe & post surface so they're approximately equal & attach... guaranteed to work as long as there's no structure near enough for the squirrel to leap to the feeder... I don't have a patent on this idea, but it's an idea I thought of myself & have never seen it done elsewhere, although I'm pretty certain it has been- I'm smart, but others out there are too...
I used air conditioning duct around mine and the raccoons climb right up it!
I modeled the EFHW-8010 for 40 meters and it has a 4 lobe pattern vs. the broadside pattern of your dipole. That can account for the differences. Other comparisons would yield different results.
just a word ...I to am interested in ham I have a great location 1550 feet sea level over looking the Tn Valley I use to CB a great deal an built a few half wave length dipoles that worked well ...oh its been some time now since you built the solar heat collector how has that project faired over time
Nice!
Last night I watched a large raccoon climb right up my pole. It worked great for a while,esp with the squirrels. I went out at 2 am and spayed the pole with vegetable oil. I have a pole in the back yard and one in the front and they seem to like climbing the front one. Any other suggestions I could try? Thanks for helping me out.
We are trying to stop a raccoon from climbing a large cherry tree. If he/she can't climb it, the hope is that he/she will hang out somewhere else. Our dogs are going crazy!!!
I have a slightly larger post, 3 1/2 x 4 1/2. I wrapped the post with 36" of aluminum starting at about 10" above the ground. It was a total and complete bust. The raccoons still shimmy up the pole. I am getting desperate.
Hello, I'm military and we rent and move a lot, so I have the standard metal pole (I like my stuff easily movable...) For info I am more miffed at my squirrels at current. Apparently I have one raccoon (my husband spotted him at 5am), but he hasn't become a pain (yet). I'm not mechanically savvy. Can you think of a way that I can wrap this around my metal pole and still easily attach it? I was thinking some kind of small bolt/nut set that I could use to secure. I really dont know how that would work considering it would have to be longer... Also how long did you make yours? Will I have to get an extra tall pole? (Mine is probably only 6 ft tall.) Also I LOVE your wood post, can you think of an easy way to make one that I can take with me in my travels? Thanks so much!! I'm new to feeding and dont want to waste money (more than I already do by feeding my birds lol) trying dozens of ways before making it work right! Also when I searched Lowes there is aluminum and galvanized steel. My original thought was that the steel would keep its shape better, but might be harder to bend. Your opinions? I know thats a lot but I would appreciate any pointers! -Thanks again!
I just finished putting mine on my two feeders. The squirrels and raccoons have been a menace . This morning my humming bird feeder was gone! I really hope this works. I bought roof flashing. I was wondering if you wax them or do anything else to make it slippery? Also did you spray paint yours copper? Thanks you so much for this video.
+sonastainbrook Hi, no, I didn't do anything with mine. The roof flashing is slippery enough on its own that neither the squirrels or raccoons can make it past the barrier. It's been in service four years now and as far as I can tell, no squirrel or raccoon has ever been able to climb it! The only thing getting to our bird feeders are the birds!
an art and hobby that is all but gone. I am part of the reason as I have 3 kids who have never keyed a radio despite having more than a dozen radio's (Comercial built and home brew). I never seem to find the time to set them up any more. it's a shame, the radio kept me out of a lot of trouble growing up and today provides for a very good career. glad to see someone getting the kids on the air.
Good to work you at N4SMS Schofield Middle School Aiken, SC yesterday SC. Watching the video reminds me it is difficult to be a Yankee fan, :)
i am on ten meters looking for some school round up contacts my call is ka8gov
6 to 8 inch pvc pipe is what i use. You can sand the print off and paint them pretty : )
Hey G. Scott...I know this video is almost 3 years old now. Hoping you could provide update on this. Raccoons still can't get up it?
Stanley G. Kimmett III Yes, the baffle is still 100% successful repelling raccoons and squirrels!
Where did you buy the baffle for the 4" x 4" post, or did you make it? Please let me know, these squirrels are keeping my birds away.
I have a very skinny metal pole. How would I attach this flashing to it?
buy a pool noodle or pipe insulation, and wrap the flashing to it, maybe?