Good Day guys, is there any know device or test equipment that can test analog tuners for a tv by sending a display test pattern based on the channel numbers, similarly how you would used a VCR on ch3 or ch4.
my problem is I can’t pick up aerial in my location when I’m servicing a TV set, and some customers need to see picture or display on the tv when it’s finished serviced. The main two channel of choice is channel 9 and channel 11. (I’m not talking about hdmi, usb, aux or composite).
melt me know if that’s available and send me the link to that particular tool.
my problem is I can’t pick up aerial in my location when I’m servicing a TV set, and some customers need to see picture or display on the tv when it’s finished serviced. The main two channel of choice is channel 9 and channel 11. (I’m not talking about hdmi, usb, aux or composite).
melt me know if that’s available and send me the link to that particular tool.
Just make an antenna yourself. Get some 300 ohm twin lead antenna wire and make a T antenna. Take an eight foot piece and strip and twist the two ends then solder them. In the middle of that piece cut one wire and strip it back half an inch on each side. Take another piece of the twin lead wire and strip one end. Tie one lead to one side of the first pieces middle and the other to the opposite lead. You end up with a T where you can follow one wire in, around the top of the T, and back down out the second end of the wire. You now have a dipole antenna. You can make the stem of the T as long as you need, it’s the eight foot top of the T that gets the signal. I plastic dip the ends of the T and the middle where they join so there is no chance of shorting out and losing signal. Just spread the T out perpendicular to the transmitter direction and enjoy!
You can buy pattern generators and signal generators pretty inexpensively these days. I remember Sencore made models for the service market that should solve your problem.
-Chris
-Chris
I like messing around with FM, I thought while I'm playing with again and going through the trouble of hanging a 45 foot high antenna bar in my back yard. It has an HD grid wich works OK with FM. Considering a piece of crap copper wire works. It is not hard to pull in FM with a decent stereo signal at night listening.
I'll aim for a little better, I'll aim for my best I can experience.
When its a bit warmer I'm planning to add the extension that came with the kit. It should meet 50 ft high, a shade more. I wonder how difficult these are to make? Its more of a time constraint so I'll probably end up buying one to test https://www.amazon.ca/Stellar-Labs-...ocphy=9000809&hvtargid=pla-307958061289&psc=1
With another look , a cinch to make. I would use canvas flat srap at the mount points. With a couple U clamps done.
I'll aim for a little better, I'll aim for my best I can experience.
When its a bit warmer I'm planning to add the extension that came with the kit. It should meet 50 ft high, a shade more. I wonder how difficult these are to make? Its more of a time constraint so I'll probably end up buying one to test https://www.amazon.ca/Stellar-Labs-...ocphy=9000809&hvtargid=pla-307958061289&psc=1
With another look , a cinch to make. I would use canvas flat srap at the mount points. With a couple U clamps done.
If you know which way the waves blow, a dipole or Yagi can beat that circular thing. It does have some directionality (it won't hear straight up or straight down), and is excellent for all-around broadcasting, but you can do better for receiving.
Height is good mostly up to a few wavelengths above the local clutter. Rooftops, leafed-out trees. Going higher is slow gain. (And here my clutter is 75 foot Spruce, and if I did build a 90 foot tower I would be catching Beechcraft.)
Height is good mostly up to a few wavelengths above the local clutter. Rooftops, leafed-out trees. Going higher is slow gain. (And here my clutter is 75 foot Spruce, and if I did build a 90 foot tower I would be catching Beechcraft.)
Initially your right, a couple roof tops and trees were blocking it up at the very tip top. It prompted me to unpack the other section. I also shyed away from using it as I installed it by myself. No else was around at the time to lend a hand. One guy trying to balance 50 ft of bar plus smallish grid, with all that leverage it becomes hilarious. I did try, once you get it about 3/4 of the way upright it takes on a mind of its own. Nearly put it through the window on the second floor.
Anyway, wont try that again. I will have a straight shot in the direction of Toronto downtown one way. I can see the CN Tower. If Referencing a map Hamilton and St Catherines are to the right. Buffulo New York while pointed to the south. Being in a major city theres no shortage of stations in every direction.
I don't have it as good the opposite way although, to the North lands. I have to have another look. The land mass goes on the incline, for hours and hours. Not sure where it levels out. It may not. That may not make a difference.
I'm roughly at the orange paint dot.
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I am in a bowl and the antennas are 47 miles away. So, 8 bay bow-tie on a pole (18 dB gain) and still had to put the Wineguard amplifier on it. ( UHF only now) Anyway, I had to use one of those cheap meters to aim it. I would go higher, but not sure it would work as dealing with diffraction and the height is a sweet-spot as it is below LOS. Higher would need more guy wires as I do need to build for 90 MPH gusts. Everyone should. Even to get FM, I had to get the 6 Yagi, but at least it works in the attic so no wind load. LOS would mean a 100 foot tower!
If you can find the old two volumes of the ARRL antenna compendium, it tells you about everything you need to know. 2M being right in the VHF band.
That Stellar labs omni is very low gain. Omni, but low gain. Probably -1 or -2. The wider the beam, the lower the gain. A really great antenna you can DIY is a rhombic, but the need to be very large, 10 Lambda works great!
8 foot is not quite right answer for a di-pole. Closer to channel 2 than mid-band. It needs to be quarter wave. Calculate it. FM, which is in the middle of VHF is 62 inches optimum. Plus, tremendous interference on the down-lead. You can actually do better with a half-Lambda and use a bit of tin foil on the downlead to tune. When I do a di-pole, I put a banun right at the center and run coax.
If running over 20 feet of downlead, jump up to RG-6. It can make a big difference over RG 59.
There are huge references on antennas and reception on the WEB, plus anyone working 2M band will understand VHF very well.
These guys have pretty good info:
https://store.antennasdirect.com/outdoor-tv-antennas.html
There are also mapping tools for antennas in the US. I suspect others for Canada so you can figure out where to aim pretty close. I am a couple degrees off the calculated.
If you can find the old two volumes of the ARRL antenna compendium, it tells you about everything you need to know. 2M being right in the VHF band.
That Stellar labs omni is very low gain. Omni, but low gain. Probably -1 or -2. The wider the beam, the lower the gain. A really great antenna you can DIY is a rhombic, but the need to be very large, 10 Lambda works great!
8 foot is not quite right answer for a di-pole. Closer to channel 2 than mid-band. It needs to be quarter wave. Calculate it. FM, which is in the middle of VHF is 62 inches optimum. Plus, tremendous interference on the down-lead. You can actually do better with a half-Lambda and use a bit of tin foil on the downlead to tune. When I do a di-pole, I put a banun right at the center and run coax.
If running over 20 feet of downlead, jump up to RG-6. It can make a big difference over RG 59.
There are huge references on antennas and reception on the WEB, plus anyone working 2M band will understand VHF very well.
These guys have pretty good info:
https://store.antennasdirect.com/outdoor-tv-antennas.html
There are also mapping tools for antennas in the US. I suspect others for Canada so you can figure out where to aim pretty close. I am a couple degrees off the calculated.
Yes not much better than OK. That grid is designed for HDTV it works better for that. I picked up 7 or 8 strong channels.
I'll either make or buy a grid best suited for FM frequencies.
It picked up decent resolution for TV, viewing. 780P was the max. If I'm not mistaken that beats old analog coax rez, from back in the day? That clocked in at a big 480 NTSC / PAL lines. I am merely copying that, I can't answer what Pal lines represent 😉
Tomorrow should be a bit dryer outside. I have another 6' piece, and another 3' - 4' slides up. Close to 10' more will work out. I simply use canvas ratchet ties. Two is plenty, it catches little wind. It didn't go anywhere last winter had fierce wind. It passed the test.
I look for a t way radio, one I can actually communicate with someone on the other end. I'll need a straight whip antenna for that. I almost shiskabobbed one of my eyes with one of them, very dangerous things lol.
Then theres a HAM' radio, not sure what those are.
Tomorrow should be a bit dryer outside. I have another 6' piece, and another 3' - 4' slides up. Close to 10' more will work out. I simply use canvas ratchet ties. Two is plenty, it catches little wind. It didn't go anywhere last winter had fierce wind. It passed the test.
I look for a t way radio, one I can actually communicate with someone on the other end. I'll need a straight whip antenna for that. I almost shiskabobbed one of my eyes with one of them, very dangerous things lol.
Then theres a HAM' radio, not sure what those are.
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