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Post by Deleted on May 21, 2018 23:35:19 GMT
Pulling Teeth When You Are Not a Dentist
cthuskeyman said he is building a neighborhood TV station.
That made a lot of ears perk up. Is there something new going on that we haven't heard about?
I asked Mr. Man how to find a TV transmitter.
He said "Look on Ebay". I looked.
Besides a landslide of hog waste there were some VHF and UHF NTSC (analog) transmitters for thousands of dollars.
I still know nothing.
So let's have some guidelines:
When telling us about your new TV station, list the following information -
Model Number
Price
RF Power Level
Channel number
Antenna Type
Analog or digital
FCC Certification Number
Rule under which the TV station is licensed.
Call letters of the station.
Another educational message from the ALPB.
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Post by part15engineer on May 22, 2018 0:53:09 GMT
it's easy to build a VHF TV exciter for NTSC. it's the 8VSB stuff that is complex.
but they are axing the UHF tv band to give it to cell companies and the VHF band will become crowded as a result there might not be any room in most metro areas for unlicensed TV pirate or otherwise.
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Post by Deleted on May 22, 2018 1:32:18 GMT
Where I'm Going
Someday I'll look into 8VSB, Part15Engineer, it sounds very fascinating.
And I know a little about NTSC, but cthuskyman made an undefined statement and I want to find out what he's got going, and I think if he read our Charter he understands that the ALPB is about members helping members.
If I were to tell you "It's easy to make a million-dollars with part 15 radio" wouldn't you want to know how to do it?
What good would I be if I didn't bother to tell you.
I also would like to help cthusky to develop some communication skills... he came close to winning the chairmanship of the ALPB, and in a position like that it's helpful to know how to get the message across.
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Post by cthuskyman on May 22, 2018 2:09:50 GMT
Pulling Teeth When You Are Not a Dentistcthuskeyman said he is building a neighborhood TV station. That made a lot of ears perk up. Is there something new going on that we haven't heard about? I asked Mr. Man how to find a TV transmitter. He said "Look on Ebay". I looked. Besides a landslide of hog waste there were some VHF and UHF NTSC (analog) transmitters for thousands of dollars. I still know nothing. So let's have some guidelines: When telling us about your new TV station, list the following information - Model Number Price RF Power Level Channel number Antenna Type Analog or digital FCC Certification Number Rule under which the TV station is licensed. Call letters of the station. Another educational message from the ALPB. I believe this is the TV transmitter in question. From EBay
As you can see, the price on this one is rather inexpensive, a mere twenty-eight bucks. The transmitter can apparently cover about two hundred meters. ***Moderated*** The last portion of this post has been moderated due to the discussion of ongoing and / or planned future operations which violate FCC rules and regulation. |
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Post by Deleted on May 22, 2018 2:33:09 GMT
This is Becoming a Film Noir Mystery Story
Matt says: "Looks like I may have to transmit on the VHF portion of the band LOL."
How will you ever get that 5 GHz transmitter on the VHF band?
I know even less than I did before.
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Post by Deleted on May 22, 2018 4:28:05 GMT
The Least Fun Thing Is to Spoil Someone's Fun
cthuskyman surprisingly said: "...a bit problematic I know, but as long as I don't do anything overly risky, I think I'll be OK."
There's a bit of cognitive dissonance going on.
The FCC rules provide no legal way to broadcast on the VHF TV band.
And there is no way to continue conversations at the ALPB about pirate broadcast activity.
LOL
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Post by part15engineer on May 22, 2018 13:13:09 GMT
be aware that transmitter might not be legal for use in the USA, it appears to violate 15.247 / 15.249 of the FCC rules and does not appear to carry FCC certification. you run the risk of a NOUO with that particular transmitter. NTSC / PAL operated under F/S rules and is not FHSS so it does not get to operate under the power antenna rule parts for the ISM band which allow for 1W and a 6db antenna. i think 200mW / 23dbm will violate the f/s regs by a large margin and since there is other licensed users beyond part 15 on the 5.8G ISM band you will be risking a complaint to the FCC. I believe but am not certain that the military shares the band with part 15 and a couple other users. i have heard of users getting busted (although rare) for violations in the 5.8GHz and 2.4GHz bands.
Perhaps Rich could chime in on this, the limits for 5.8GHz under 15.249 using analog modulation are 50mV /m
@ 3m and appears it must be fixed point to point and not point to multi point. the device in question appears to have an omni dipole arrangement and not a directional antenna and appears to have no FCC part 15 certification.
FCC Part 15.247
FCC Part 15.249
Disclaimer: this is for informational purposes only as the poster might not be aware of the legalities of this particular device under FCC part 15 rules.
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Post by part15engineer on May 22, 2018 13:19:52 GMT
you may want to look into a FHSS version of this which alows up to 1W TPO of RF power applied to the terminals of a 6DB gain omni vertical. you neighbors could then be directed to buy a suitable receiver set and directional antenna for reception of your programming. perhaps you could hand out a couple of receiver sets. to a few select neighbors as demo units.
I like that idea, might try that one myself.
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Post by Deleted on May 22, 2018 13:29:30 GMT
Keep in Mind
Confusion continues in the cthuskyman style...
Part15Engineer, your comments about the linked 5.8 GHz transmitter are on point so far as that transmitter is concerned, but cthuskyman also said he would ultimately broadcast on the VHF TV band.
This entire episode has been a trail of bread-crumbs but we still don't know where it is actually leading.
I have other suspicions which will be shared later.
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Post by cthuskyman on May 22, 2018 18:18:37 GMT
The Least Fun Thing Is to Spoil Someone's Functhuskyman surprisingly said: "... a bit problematic I know, but as long as I don't do anything overly risky, I think I'll be OK." There's a bit of cognitive dissonance going on. The FCC rules provide no legal way to broadcast on the VHF TV band. And there is no way to continue conversations at the ALPB about pirate broadcast activity. LOL So let's put this one to bed.  |
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Post by thelegacy on May 26, 2018 18:44:05 GMT
There are audio video centers that are legal to use on the 900 megahertz band and I do believe 2.4 megahertz band. But I do believe the range is quite Limited. I had one that I used in the house that only got out a few rooms away. I definitely used it to transmit my satellite receiver to the other TVs in the house.
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Post by Druid Hills Radio on May 27, 2018 20:23:45 GMT
Look for used analog cable tv modulators.
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Post by Deleted on May 27, 2018 21:37:07 GMT
Almost Forgot About That
Druid Hills shares the secret: "Look for used analog cable tv modulators."
Here at KDX Worldround Radio we have two Blonder-Tongue Analog TV Modulators, Channel 7 and Channel 13.
During our recording studio days we set up a private TV cable system connecting several parts of the facility, including the lunch area. We could view video material on TV monitors.
Meanwhile, a friend of the time hooked his TV modulator to rooftop TV antenna and played VHS movies to his neighborhood in the days when home video recorders were new and most people didn't yet own one.
The professional modulators are adjustable from 0 to 10 Watts RF output.
Since analog TV is mostly past history, I'm guessing that a low power VHF TV station today could go largely unnoticed.
However I have no intention to find out. Academic exercises are fine, but leave reality to other people.
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Post by sparepart on May 28, 2018 1:05:56 GMT
Look for used analog cable tv modulators. As an academic exercise : Look at the Zee Vee HDBridge 2xxx series of ATSC modulators. Download the owners manual and note the RF level delivered to the output, and the warning "do not connect directly to television". Yes, it's hot enough to fry the front end of your television. SP |
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