In the engineering world a decade just means something times 10. A geek would say "an order of magnitude". Anyway cross polarized antennas see a 20 db loss which works out to the same signal strength as multiplying your original distance by 10 using the formula 32.45 + 20 Log (Frequency MHZ) + 20 Log (Distance in Kilometers)
Excellent information for the inexperienced user. Great way to demonstrate your point. Have you tried this in the field and at what distances? Thanks again.
Thanks for watching. The 26 Mile range that some claim is most likely free space path loss, 32.45 + 20 Log F + 20 Log D, where F is frequency in MHz and D is distance in KM. I would imagine that 2 sky divers jumping out of airplanes separated by 26 miles could talk on their way down, but here on earth with it being a curved surface with trees and buildings and such, a mile can be expected. Perhaps several miles on a large lake or open field.
Ive been involved with radio stuff for about 4 years now and using the regular blister pack walkie talkies in the field - I have no idea how they can advertise getting 26+ miles with them. But this is an awesome video, I definitely learned a bunch!
Watch a Pre-January 8th copy of Inception. Listen closely when the actors say imagine, reality, and safe, or point pistols. You'll hear the words, Loughner, offin' her, part of the word Giffords, and much more. Some even say they hear, do it.
@pveg65 Yeah Fluke meters rock. a little expensive for one who just needs to check a battery of test a lamp once a month; but for anyone interested in being a serious player of electronics I would avoid the cheep Walmart meter and spend some green on one of the Fluke meters in the $150.00 range.
Hello and thank you for the clear and simple explanation on radio usage. I'd love if there was more coming. Maybe on the various benefits of each style of radio/frequency. Being a po boy, I love the CB but understand the advantage of Ham.
Very informative, thank you. I also visualize it as similar to a light bulb that sends out lights on side ways, if you tilt it, then those lights will cut vertically up down or diagonally, not towards the receiver.
@peterkim1999 Yeah, you could think of it as light waves, that's how polarized sunglasses work, they pass uniform light rays but block the scattered rays which cause the glare that makes things look unclear. Fresh water fishermen like polarized sunglasses because they can see through all the glare caused by the sun hitting the surface or the water and reflecting off at odd angles.
@texture6 No, the detector is designed for just vertical reception - but so would be the receiving radio that you are trying to talk to. That's the point of this video. Cell Phone towers use big and expensive circular polarized antennas so people can hold their cell phone in any position they want. But with simple FRS radios like these, you need to understand how antenna position can effect your ability to communicate.
In the engineering world a decade just means something times 10. A geek would say "an order of magnitude". Anyway cross polarized antennas see a 20 db loss which works out to the same signal strength as multiplying your original distance by 10 using the formula 32.45 + 20 Log (Frequency MHZ) + 20 Log (Distance in Kilometers)
kgradio 2 months ago
haha "20db is a decade in distance" Oh I thought a decade was a measure of time. Maybe you meant a light decade?
radiosification 3 months ago
Excellent information for the inexperienced user. Great way to demonstrate your point. Have you tried this in the field and at what distances? Thanks again.
roybofmn 3 months ago
how or where do i get info on building that R/F detector you build .thank you in advance
wildcat2488 4 months ago in playlist Liked
You know it seemed like a minor detail about holding the 2-way radio, but significant nonetheless! great video. thanks!
conrad13579 8 months ago
Fascinating.
Do you ever mess around with Amateur TV?
SuperTechieJ 9 months ago
Thanks for watching. The 26 Mile range that some claim is most likely free space path loss, 32.45 + 20 Log F + 20 Log D, where F is frequency in MHz and D is distance in KM. I would imagine that 2 sky divers jumping out of airplanes separated by 26 miles could talk on their way down, but here on earth with it being a curved surface with trees and buildings and such, a mile can be expected. Perhaps several miles on a large lake or open field.
kgradio 9 months ago
Ive been involved with radio stuff for about 4 years now and using the regular blister pack walkie talkies in the field - I have no idea how they can advertise getting 26+ miles with them. But this is an awesome video, I definitely learned a bunch!
oregonninetwentynine 9 months ago
This has been flagged as spam show
Watch a Pre-January 8th copy of Inception. Listen closely when the actors say imagine, reality, and safe, or point pistols. You'll hear the words, Loughner, offin' her, part of the word Giffords, and much more. Some even say they hear, do it.
jamestargetedindiv 11 months ago
@pveg65 Yeah Fluke meters rock. a little expensive for one who just needs to check a battery of test a lamp once a month; but for anyone interested in being a serious player of electronics I would avoid the cheep Walmart meter and spend some green on one of the Fluke meters in the $150.00 range.
kgradio 1 year ago
Hello and thank you for the clear and simple explanation on radio usage. I'd love if there was more coming. Maybe on the various benefits of each style of radio/frequency. Being a po boy, I love the CB but understand the advantage of Ham.
johnjmw1 1 year ago
Very informative, thank you. I also visualize it as similar to a light bulb that sends out lights on side ways, if you tilt it, then those lights will cut vertically up down or diagonally, not towards the receiver.
peterkim1999 1 year ago
@peterkim1999 Yeah, you could think of it as light waves, that's how polarized sunglasses work, they pass uniform light rays but block the scattered rays which cause the glare that makes things look unclear. Fresh water fishermen like polarized sunglasses because they can see through all the glare caused by the sun hitting the surface or the water and reflecting off at odd angles.
kgradio 1 year ago
you should be a ham
cobra395 1 year ago
@cobra395 Yeah, been there done that, I've been licensed for about 16 years, thanks for watching my video.
kgradio 1 year ago
nice example of polarization
eman20083421 1 year ago
yagi....i mean thank you
texture6 1 year ago
Nice vid good to know
SOLOK1LLA 1 year ago
you need to re-send this as a responce video it did not go thru
dsarti1 1 year ago
I get the power signal but is the reader designed for both vertical and horizontal antennas?
texture6 1 year ago
@texture6 No, the detector is designed for just vertical reception - but so would be the receiving radio that you are trying to talk to. That's the point of this video. Cell Phone towers use big and expensive circular polarized antennas so people can hold their cell phone in any position they want. But with simple FRS radios like these, you need to understand how antenna position can effect your ability to communicate.
kgradio 1 year ago 2
wow...thats amazing. I had no clue
mhayd990 1 year ago
great explanation
dsarti1 1 year ago