When I got to the part about the di-pole, I paused it for a second and thought about it. I grew up in a neighborhood that was right under the glide path for a very busy, and fuckin loud ass runway at Cleveland Hopkins Airport (Ohio, Represent!), It was so bad, that the county paid for some grant that allowed the cities to offer free repairs peoples houses because of siding, roofing and window problems caused by all the vibrations from the aircraft overhead. Yeah, Thanks for the future hearing aid, Boeing! FU So when you mentioned that you were hearing some odd noise that reminded me of something I used to hear on a scanner listening to air traffic control because i'm a dork like that, I do not know what frequency range you are trying to pick up with that di-pole, but here is something to consider when trying to track down the ass ache that could be causing these various problems. So because I have always been somewhat of a geek, and I was also interested in radios and how they work, I learned about a weather phenomena called wake turbulence, it's the shit ->storm
for that dipole you have under the eaves.... if u bring that out to the edge of the roof and raise it about 6 inches above the roof you will solve your problem with the directionality and also probably fix the resonance.
Hmm, good thought. The dipole is hung on the side of the building using CATV coax clips that were already on the wall. It also took a bit of work to get a ladder up there. I might fix that antenna sometime this summer.
i know this is an old video so u have probably rebuilt this a couple times by now. but you should put the cap outside of the large loop. anything inside the large loop will effect the tuning of the antenna. also if u put the smaller loop at the top and the cap at the bottom under the large loop you will be able to tune it better.
Also a good idea. Strangely, most of the loops I referenced while building this one had caps inside the loop, so I never considered the other configurations. Eventually, I'll have this loop better altered for the "automatic" tuning and operate it on 40m. When that happens, I'll probably test what you mentioned.
It doesn't really matter whether the capacitor is inside or outside the loop since the magnetic field wraps around the refrigerator tubing anyway; there's as much magnetic field in close proximity on the ouside as there is inside. Would it change the tuning? Sure, and you adjust the capacitor by about one degree of rotation to compensate. Done! Problem solved. What is likely to get benefit is braided wire from the rotor to the loop. You will have 10 to 20 AMPS of current when transmitting. I've had quarter inch copper tubing warm up while transmitting only 40 watts. Thicker tubing made a big difference for me.
MFJ mass produces a very successful 40-10 loop, that has everything within the loop, it is smaller, and built to sit on a mast in horizontal polarization. Just build it the way you can, and reinforce it once radio tunability is happy. 2 things I suggest: -The driven loop should be feedpoint away from big loop for better coupling. -Keep it standing up, because when it is, the antenna is endfire directional, and it is kinda cool to be able to rotate it to favor signals, per direction, and prove the Earth is round by hearing Japan with antenna pointed NNW/SSE.
+Ron Rudd Yep, Kenwood TS-120s. Functions well except for one audio glitch if you turn it up too high on speaker. And an old Hallicrafters 1-30 MHz receiver next to it.
It's better than mine LOL I have a Alinco DX9T a cheapo radio on a MFJ 40-15m loop. Ham radio here in Australia is DEAD!!! there is a whole 14k of them here. I can turn the radio on all day on a 2m or 70cm frequency and here nobody. I only got a basic licence this year but never knew it was this dead. About a month ago I bought a new Yaesu FTM-100DR digital/analogue - pretty cool little radio and has GPS and APRS. If you use the digital repeaters on the Wires-X it shows your callsign and distance stats. Only thing wrong with that one for me is it transmits 5/20/50W and 5W isn't enough to reach city repeater and only licenced for 10W so if I talk just hope they don't ask what power I'm running so I don't need to Lie hahaha ;-) Just leave it on full power, doesn't cause any problems to anything so can't see anyone giving a stuff. :)
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When I got to the part about the di-pole, I paused it for a second and thought about it. I grew up in a neighborhood that was right under the glide path for a very busy, and fuckin loud ass runway at Cleveland Hopkins Airport (Ohio, Represent!), It was so bad, that the county paid for some grant that allowed the cities to offer free repairs peoples houses because of siding, roofing and window problems caused by all the vibrations from the aircraft overhead. Yeah, Thanks for the future hearing aid, Boeing! FU
So when you mentioned that you were hearing some odd noise that reminded me of something I used to hear on a scanner listening to air traffic control because i'm a dork like that, I do not know what frequency range you are trying to pick up with that di-pole, but here is something to consider when trying to track down the ass ache that could be causing these various problems.
So because I have always been somewhat of a geek, and I was also interested in radios and how they work, I learned about a weather phenomena called wake turbulence, it's the shit ->storm
That sound is RTTY, or Radioteletype. Its a digital mode where you alternate tones to make the zeroes and ones in your signal.
for that dipole you have under the eaves.... if u bring that out to the edge of the roof and raise it about 6 inches above the roof you will solve your problem with the directionality and also probably fix the resonance.
Hmm, good thought. The dipole is hung on the side of the building using CATV coax clips that were already on the wall. It also took a bit of work to get a ladder up there. I might fix that antenna sometime this summer.
i know this is an old video so u have probably rebuilt this a couple times by now. but you should put the cap outside of the large loop. anything inside the large loop will effect the tuning of the antenna. also if u put the smaller loop at the top and the cap at the bottom under the large loop you will be able to tune it better.
Also a good idea. Strangely, most of the loops I referenced while building this one had caps inside the loop, so I never considered the other configurations. Eventually, I'll have this loop better altered for the "automatic" tuning and operate it on 40m. When that happens, I'll probably test what you mentioned.
It doesn't really matter whether the capacitor is inside or outside the loop since the magnetic field wraps around the refrigerator tubing anyway; there's as much magnetic field in close proximity on the ouside as there is inside. Would it change the tuning? Sure, and you adjust the capacitor by about one degree of rotation to compensate. Done! Problem solved.
What is likely to get benefit is braided wire from the rotor to the loop. You will have 10 to 20 AMPS of current when transmitting. I've had quarter inch copper tubing warm up while transmitting only 40 watts. Thicker tubing made a big difference for me.
MFJ mass produces a very successful 40-10 loop, that has everything within the loop, it is smaller, and built to sit on a mast in horizontal polarization. Just build it the way you can, and reinforce it once radio tunability is happy.
2 things I suggest:
-The driven loop should be feedpoint away from big loop for better coupling.
-Keep it standing up, because when it is, the antenna is endfire directional, and it is kinda cool to be able to rotate it to favor signals, per direction, and prove the Earth is round by hearing Japan with antenna pointed NNW/SSE.
Is that like a 1970's HF radio?
+Ron Rudd Yep, Kenwood TS-120s. Functions well except for one audio glitch if you turn it up too high on speaker. And an old Hallicrafters 1-30 MHz receiver next to it.
It's better than mine LOL I have a Alinco DX9T a cheapo radio on a MFJ 40-15m loop. Ham radio here in Australia is DEAD!!! there is a whole 14k of them here. I can turn the radio on all day on a 2m or 70cm frequency and here nobody. I only got a basic licence this year but never knew it was this dead.
About a month ago I bought a new Yaesu FTM-100DR digital/analogue - pretty cool little radio and has GPS and APRS. If you use the digital repeaters on the Wires-X it shows your callsign and distance stats. Only thing wrong with that one for me is it transmits 5/20/50W and 5W isn't enough to reach city repeater and only licenced for 10W so if I talk just hope they don't ask what power I'm running so I don't need to Lie hahaha ;-) Just leave it on full power, doesn't cause any problems to anything so can't see anyone giving a stuff. :)
I have high power lines going past apartment I live at here in New Westminster BC
Chicago...EWWWWWWW