mram1500
Junior Member
No Jab -Just Fact
Posts: 67
|
Post by mram1500 on Oct 30, 2018 0:09:53 GMT
Reference the opening post about the W.VA. station: Similar story for an Akron, Ohio station.
A Community group NPO obtained a construction permit for an LPFM. Seems they didn't know what they were doing and the permit expired before they could get on the air.
So, they got an extension on the permit and the time ran out on that also.
Then, a few months later they got on the air but it was already too late since the construction permit was now officially expired.
Well that was over a year ago and they are still on the air. The signal has improved as well as the audio.
Their programming has improved and they added two or three community talk programs.
They have community support but no license and so far, no one has said booooo.
|
|
|
Post by thelegacy on Oct 31, 2018 17:46:17 GMT
The Only thing I can think of are two things that play in this and that makes ALL the difference.
1. They went through all the legal channels and tried to get things up and running during the allotted time limit for the construction permit. The station failed but went on air anyway due to all the community involvement and money spent. It would be like you buying a Yamaha home stereo system and the company decided to fold due to loss and didn't send you a stereo and noy never got your money back. So they went on and operated just as they would have if still licensed.
2. Unlike the Rock 104.1 station in Williamson, WV the FCC gave them a frequency to use by studying the spectrum for this area. This means a lot since there would be zero chance for them to interfere with a licensed station. The interference claim would be moot.
3. Unlike the Rock 104.1 station in Williamson, WV they were using a certified part 73 transmitter which is well filtered and has clear signal generation but Rock 104.1 Williamson used a cheap $60 CZE-7C which uses a BH1415F chip connected to a cheap broadband amplifier and also using under rated cheap poorly designed parts and their filtering is cheap or almost non existent. Thus the 18.075 spur you can figure where they will interfere by adding 104.1+18.075 their spur will be on 122.175 Mhz. This is RIGHT IN THE AIRCRAFT BAND!! so thus I bet the Williamson, WV station was unknowingly coming in on aircraft communications. And due to the fact they were transmitting on FM with their spur and aircraft is AM it may seem like a dead carrier. Remember the agent said sometimes spurs don't have the audio on them but a dead carrier making it hard to simply use a Radio to detect interference. Its easier if you turn your transmitter on and off when you hear one but even that may not show you the hash (static like) spur.
Reading the NOUO's and this one I read from NY and the info the agent gave me all makes things quite clear when I look at the full picture as this science lesson was learned. FM has qualities that unlike AM can cause lots of chaos and this is why now the FM band has to be as heavily protected as we're seeing.
I hope this word does get out to educate more folks thinking about doing the same thing.
|
|
mram1500
Junior Member
No Jab -Just Fact
Posts: 67
|
Post by mram1500 on Nov 1, 2018 1:59:13 GMT
I sympathize with them but two rights don't offset the wrong.
They're still operating without a license.
|
|
|
Post by mark on Nov 1, 2018 4:06:09 GMT
In their defense, and not defending operating without a license, they in their mind THOUGHT they had permission based on a phone conversation and most likely a misunderstanding from someone who "used" to work at the FCC as I understood it(correct me if I am wrong). It would probably never occur to them that the CZH 7W transmitter they were using was getting into the aircraft band.
Legacy, when you were using it did you think about that? Majority don't until they find out like you did. In fact does any average Joe buying these on Amazon know where the aviation band is?
|
|
|
Post by mighty1650 on Nov 1, 2018 18:20:40 GMT
Years ago I put a chineseum 5 watt transmitter on a spectrum analyzer, I was actually surprised to find it was completely clean and well within the limits. As far as I know that particular model is no longer on eBay and seemed to be uncommon by the time I purchased mine second hand.
|
|
|
Post by thelegacy on Nov 7, 2018 2:10:19 GMT
When I had my CZE-7C I did NOT think it would have any spurs from 108-140 Mhz. I even talked to others who claim they tested theirs so I thought I was OK but I did hear of spurs on the lower side.
|
|