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Post by MonkeyMan on Dec 2, 2015 19:11:00 GMT -5
One marginal UHF channel pixelated ever so slightly, that's it.
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Sandbagger
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Post by Sandbagger on Dec 2, 2015 19:37:26 GMT -5
I wired in the TV in our master bedroom a while back. Tonight I decided to see what effect the CB would have on my reception. A 2.5 watt carrier on channel 20 completely wiped out channel 2, and I mean completely, no audio necessary. The next lowest, channel 6 was unaffected even with audio. I didn't check any others, they're all on UHF so I assume they wouldn't be effected unless I hit the gas. Of course the Imax and my UHF antenna are on the same mast... The 2nd harmonic of the CB band falls right on TV channel 2, so I'm not surprised. That's the one channel where a low pass filter would help. The 3rd harmonic falls on channel 5, but we don't have a channel 5 in this area so no big deal. I wouldn't expect any interference on the UHF channels, unless you are overloading a receiver preamp, or getting into the TV through the AC power lines, or through poor shielding.
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Post by MonkeyMan on Dec 4, 2015 10:05:23 GMT -5
Would a decent filter stop the interference?
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Sandbagger
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Post by Sandbagger on Dec 4, 2015 20:50:00 GMT -5
Would a decent filter stop the interference? A good low pass filter SHOULD reduce the 2nd harmonic out of the radio. Whether or not it reduces it enough to stop the interference completely, I can't say. Too many variables to say for sure. A lot has to do with the level of the TV signal, as compared to the level of the interference from the 2nd harmonic. Having the CB and the TV antennas so close together doesn't help either.....
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Post by MonkeyMan on Dec 4, 2015 21:52:01 GMT -5
Would a decent filter stop the interference? A good low pass filter SHOULD reduce the 2nd harmonic out of the radio. Whether or not it reduces it enough to stop the interference completely, I can't say. Too many variables to say for sure. A lot has to do with the level of the TV signal, as compared to the level of the interference from the 2nd harmonic. Having the CB and the TV antennas so close together doesn't help either..... I'm really the only one in the house that watches that channel so if I was on the radio chances are that it wouldn't be a problem. But I do have the DVR set to record a few shows so that might be an issue. Maybe I'll pick up a filter to experiment with. Couldn't hurt.
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Post by doctor on Dec 5, 2015 9:13:58 GMT -5
Reminds me of the old days...channel 2, my 10 meter radio knocked it out and so did 6 meters, I did put a filter on the radio, and it reduced the interference maybe 60 percent, but filters might be better built today than many years ago. DOCTOR/795
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Post by MonkeyMan on Dec 5, 2015 16:36:53 GMT -5
Reminds me of the old days too. I was still at home, but with a full time job after high school, so I had basic cable installed, tvi solved and I footed the bill until I moved out. The phone was a separate issue, and my mom liked to talk on the phone ALOT, still does. What I ended up doing there was was buying a device at radio shack that plugged into the phone jack and lit up whenever the phone was in use, then I'd lay off. Ah, the good ole days.
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Sandbagger
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Post by Sandbagger on Dec 5, 2015 18:43:55 GMT -5
A good low pass filter SHOULD reduce the 2nd harmonic out of the radio. Whether or not it reduces it enough to stop the interference completely, I can't say. Too many variables to say for sure. A lot has to do with the level of the TV signal, as compared to the level of the interference from the 2nd harmonic. Having the CB and the TV antennas so close together doesn't help either..... I'm really the only one in the house that watches that channel so if I was on the radio chances are that it wouldn't be a problem. But I do have the DVR set to record a few shows so that might be an issue. Maybe I'll pick up a filter to experiment with. Couldn't hurt. Only place it could hurt is in the wallet if it doesn't work. But it won't be THAT painful....
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Sandbagger
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Post by Sandbagger on Dec 5, 2015 18:46:50 GMT -5
Reminds me of the old days...channel 2, my 10 meter radio knocked it out and so did 6 meters, I did put a filter on the radio, and it reduced the interference maybe 60 percent, but filters might be better built today than many years ago. DOCTOR/795 Low pass filters can only do so much, and they're only effective against harmonic related interference. They won't do a darn thing to stop interference created by near field signal overload, or fundamental signal RF entering devices via poor shielding or the AC power lines.
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Post by MonkeyMan on Dec 10, 2015 12:01:57 GMT -5
I don't often get to see television during the day, but the new antenna is doing its job. Currently rocking 100% signal quality on channel 2 and The Rockford Files is coming on.
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Sandbagger
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Post by Sandbagger on Dec 10, 2015 12:32:21 GMT -5
I don't often get to see television during the day, but the new antenna is doing its job. Currently rocking 100% signal quality on channel 2 and The Rockford Files is coming on. There's no substitute for more db gain......
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Post by MonkeyMan on Dec 10, 2015 14:55:48 GMT -5
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Post by MonkeyMan on Dec 10, 2015 14:58:26 GMT -5
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Post by MonkeyMan on Dec 11, 2015 8:26:45 GMT -5
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Sandbagger
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Post by Sandbagger on Dec 11, 2015 11:11:27 GMT -5
Yea, that pretty much sums it up by saying that it's all about money. As long as the TV stations are making money, there is little incentive for them to voluntarily cease operations. Here's hoping.......
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Post by MonkeyMan on Dec 12, 2015 17:19:30 GMT -5
Still having some issues with channel 2 at times. I don't know if it will make much difference, but I'm going to move the preamp up to the UHF/vhf combo then run the 50 ft jumper down to the UHF only antenna. This instead of the 50 ft jumper running up from the preamp up on the lower mast.
Electrically, it will get the preamp much closer to that antenna where I need all the gain I can get. We'll see.
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Post by MonkeyMan on Dec 17, 2015 11:06:58 GMT -5
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Post by MonkeyMan on Dec 17, 2015 15:33:26 GMT -5
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Sandbagger
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Post by Sandbagger on Dec 17, 2015 16:29:59 GMT -5
Perhaps the author of this piece doesn't fully understand the difference between digital data and an RF signal, but I don't think it would be very likely that you could plug a device into the HDMI or USB port and pull in TV signals that you currently need a hi-gain yagi antenna on the roof to get. Unless they're proposing simulcasting over the air at the same time streaming to the internet, via WiFi. In which case, if you are "broadcasting" over the internet, why would you need the OTA signal too? I guess I'm going to have to look into the new standard and see what it's all about. One thing I do know is that when you increase the density of the signal, the greater the signal/noise needs to be to prevent errors. So if the current 8VSB signal is just barely usable, if they change the format to allow a greater amount of data to be broadcast, you will probably have to get an even bigger antenna to keep the S/N ratio usable. But that's still a couple of years down the pike yet......
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Post by MonkeyMan on Dec 18, 2015 11:00:43 GMT -5
Perhaps the author of this piece doesn't fully understand the difference between digital data and an RF signal, but I don't think it would be very likely that you could plug a device into the HDMI or USB port and pull in TV signals that you currently need a hi-gain yagi antenna on the roof to get. Unless they're proposing simulcasting over the air at the same time streaming to the internet, via WiFi. In which case, if you are "broadcasting" over the internet, why would you need the OTA signal too? I guess I'm going to have to look into the new standard and see what it's all about. One thing I do know is that when you increase the density of the signal, the greater the signal/noise needs to be to prevent errors. So if the current 8VSB signal is just barely usable, if they change the format to allow a greater amount of data to be broadcast, you will probably have to get an even bigger antenna to keep the S/N ratio usable. But that's still a couple of years down the pike yet...... See here... www.wica.intec.ugent.be/files/bmsb2015/keynotes/BMSB2015_ATSC_3_Chernock.pdf
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Post by MonkeyMan on Dec 18, 2015 11:55:41 GMT -5
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Sandbagger
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Post by Sandbagger on Dec 18, 2015 13:17:31 GMT -5
Perhaps the author of this piece doesn't fully understand the difference between digital data and an RF signal, but I don't think it would be very likely that you could plug a device into the HDMI or USB port and pull in TV signals that you currently need a hi-gain yagi antenna on the roof to get. Unless they're proposing simulcasting over the air at the same time streaming to the internet, via WiFi. In which case, if you are "broadcasting" over the internet, why would you need the OTA signal too? I guess I'm going to have to look into the new standard and see what it's all about. One thing I do know is that when you increase the density of the signal, the greater the signal/noise needs to be to prevent errors. So if the current 8VSB signal is just barely usable, if they change the format to allow a greater amount of data to be broadcast, you will probably have to get an even bigger antenna to keep the S/N ratio usable. But that's still a couple of years down the pike yet...... See here... www.wica.intec.ugent.be/files/bmsb2015/keynotes/BMSB2015_ATSC_3_Chernock.pdfInteresting. They are claiming the ability to layer different levels of data simultaneously, and based on signal level, the quality of that signal will adjust. Strong signals will deliver the best quality and highest definition. Weaker signals will drop down in resolution proportionately. Clever how they can do this. It's like 4 people keying up their radios simultaneously, with 4 watts, 20 watts, 100 watts, and 500 watts, and somehow we'd be be able to "hear" the lower power signals within the higher power ones. I'd love to hear the explanation on how that's done. It's certainly an advancement in signal decoding. But one thing also stands out, the implementation of the new standard will obsolete current TV receivers. Keep that in mind when you're contemplating the purchase of that new 60" big screen. But technology has been advancing at ridiculously insane speeds lately. What was cutting edge 3 or 4 years ago is now becoming obsolete. On the one hand it keeps the entertainment device makers in business, as the devices will become obsolete before they actually fail....
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Post by MonkeyMan on Dec 18, 2015 15:13:33 GMT -5
Pretty cool stuff, eh? There are a few videos on YouTube of mobile testing.
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Post by MonkeyMan on Dec 22, 2015 17:46:39 GMT -5
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Sandbagger
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Post by Sandbagger on Dec 22, 2015 19:38:28 GMT -5
As programming costs rise, cable companies pass the costs on. Add in the costs to comply with government regulations, and it's no wonder the price is so high. What scares me though is what's coming. As people start scaling back on their cable services, they will ramp up their internet bandwidth usage tapping into streaming video services. Since most people get their high speed internet access through either the cable or phone companies, they will soon start socking it to consumers for that. Watch for bandwidth usage limits, additional costs if you exceed the limit, tiered service etc. The days of flat fee for unlimited usage are numbered.....
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Post by MonkeyMan on Jan 12, 2016 11:35:33 GMT -5
So after a recent re-scan of channels I discovered that I now have Buzzr, which reruns several vintage game shows. What’s My Line, To Tell the Truth, Let’s Make a Deal, Match Game and the original Family Feud with Richard Dawson are all on among others. So cool to see the vintage cars Let’s Make a Deal gave away. The other night was a convertible 1972 Chevelle and a 2 door Vega Kammback. I also spotted a $500 and a $1000 dollar bills which are both pretty much gone.
I’m also receiving, albeit barely and only at certain times of the night, Rev’n TV which is all manner of car, truck, racing and hot rod programs. This is on WZPA, UHF channel 33 broadcasting out of the Roxborough antenna farm with an ERP of 3 kw.
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Post by MonkeyMan on Jan 27, 2016 21:05:54 GMT -5
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Sandbagger
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Post by Sandbagger on Jan 28, 2016 13:40:43 GMT -5
I would think the guy proposing this has actually talked to the FCC about placing numerous transmitters that need to exceed part 15 limits in order to make the network operate. Usually transmitters which exceed part 15 rules require licensing or some other authorization, and be located on a frequency spectrum that's allocated for this type of transmission. Of course this might dovetail back to the whole idea of TV broadcasters giving up spectrum for companies like this to take over. I also hope that "dirty digital" transmissions don't cause interference to other already operating radio services.
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Post by MonkeyMan on Feb 1, 2016 18:05:02 GMT -5
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Post by MonkeyMan on Feb 1, 2016 18:08:28 GMT -5
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