The Rolls would still sound better than AM as AM tops out at 5K with the 10 klz bandwidth. FM tops out at 15K so any quality FM transmitter should be pretty flat from 30Hz-15Klz. That it only gets to 12.5K, and probably with drop out at that, tells me it’s not that good an item.
Well, I certainly doubt the use of these wireless headphones, as they come from the store is illegal or “pirate”. The only possible discussion would be if “broadcasting” with them is outside of the realm of their legal use. In which case we need a legal definition of broadcasting.
Now, I don’t know where you’re finding the review of the guy who…[Read more]
Mr. Wonderful was calling users of such devices pirates. At best he was being disingenuous, at worst deliberately misleading. It doesn’t appear that there’s anything wrong with using these Part 15(.236) certified devices, unlicensed, on the frequencies between 76-88 Mhz, as long as you don’t cause interference with other l…[Read more]
I believe “Mr. Wonderful” is right that these are not applicable for 15.239 use. However, they ARE available for use under 15.236. This is clearly spelled out in the FCC’s “Wireless Microphones Rules Update” of 11/1/2017.
It states 76 – 88 mHz can operate under 15.236, unlicensed, with a maximum power of 50 mW EIRP. And also operate under Par…[Read more]
Whitespace devices have been around a while, and the issue has always been whether broadcasting was an acceptable use. It appears, at least from this one agent’s comment, that it would be OK, as long as all the other provisions of the Whitespace rules are followed.
In my opinion, broadcasting is problematic in any event as the onus is up to the…[Read more]
If you read the full report you will see it is ALSO compliant for 15.236 and in fact has a FCC ID issued for part 15 certification.
I was a bit concerned about a couple other details — the rule states:
“(b)Operation under this section is limited to wireless microphones as defined in this section.”
And the definition in this section…[Read more]
Looked up the certification and saw this complies with Part74 and states this item is for NON- BROADCASTING. Also saw the word licensed with part 74.
Just going by the non- broadcasting it means the intent can’t be getting out to the general public. This is similar to the Canadian definition of broadcasting and non-broadcasting. It was certified…[Read more]
Well, that’s just one of many radio options. I bought mine a couple years ago and they were less expensive.
But as was mentioned, there are thousands of radios with TV audio band in them that would work quite well. I have several multi band portable radios from the 70’s and 80’s with great sound that would work.
Still easier to find a suitable…[Read more]
Yes that Sony ICF-801 is still available on Ebay new but used to be under $100 + shipping but now for some reason the price is around $250-$300. Amazon has none. Whole page of them on Ebay.
But can you convince…[Read more]
I already posted this string of random comments in the FB Part 15 group, but for others:
Well, there are several comments I have here. First of all which name/model headphones? There are many “ONN Wireless Headphones”. Second of all, what did he have to green light? Thousands and thousands of people have purchased these and used them to transmit…[Read more]
But no radio goes below 87.5, at least for the N America market. And 84.922 isn’t a designated frequency that a digital tuner would go to, especially a selective one. You would be detuned. The only radios that would receive it properly would be an analog tuning radio that goes from 76-108 or an older radio with TV VHF audio and wouldn’t have the…[Read more]
And to add, the IC number(on the Broadcastvision) for Canada is not valid!….as I forgot about that so yes you can’t trust this company.
Sorry, RFCCLebanon, maybe the Broadcastvision wasn’t a good recommendation.
I’m also amused that this is a “digital transmitter”. It does not accept any digital form of audio, it has analog inputs only, and it does not transmit any digital data, as well. No digital audio, not even RDS. It’s “digital” in the fact that the frequency used is read out digitally. LOL.
Yeah, there’s ZERO chance the Rolls HR70 is even legal for sale in the USA. It doesn’t seem to be certified, at least it’s not mentioned in any listings for it and a search of the FCC database has no mention of it. Most legit Part 15 certifications are readily searchable at the FCC.
Not surprising as it has several readily apparent issues that…[Read more]
I’d be leery of the Broadcastvision models.
While the last one I tested was about 2 1/2 years ago, it was WAY over the legal limit. See my test report at:
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Not all car mp3 players are under powered. In fact, the FCC pulled a number off the shelves years ago for not being Part 15 compliant. It sounds like the ones you’re using are OK.
Just to give you how much the Rolls is NOT compliant…
The amount of power required to meet the Part 15 FM rules is measured in nanowatts (around 20), not m…[Read more]
RFCCLebanon, You can still use something better than a car FM transmitter that goes 10 ft.
Looked at that Rolls one and of course not certified for part 15 and connecting any BNC antenna to the jack at 40 mW will put you way over the limit but I noticed it has a variable RF control on the front. Probably with a rubber duck BNC antenna type and…[Read more]
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