@gamewellactive 2 weeks, 5 days ago
Actually, I do know the voltage of the power supply. A plug run in parallel with the transmitter board supply also powers the CD-ROM. A computer power supply will work (as long as it doesn’t introduce noise).
Sorry, but I just don’t have the knowledge, equipment and patience to fix the power supply. I probably could if I wanted to and wa…[Read more]
If, as the manufacturer claims, and the evidence indicates, the entire system is certified, then the amount of additional radiation introduced by the coax cable is insignificant.
In addition to that, the radiation introduced by coax in a properly matched antenna system is minimal, regardless of whether it is possible or not.
I suggest…[Read more]
I can answer a few of your questions.
The Rangemaster can (and should be) tuned to provide exactly 100mw input to the final. There are two ways to do this. They provide a module that indicates when you are exactly at 100mw, but I’ve never trusted that (the one I had was difficult to read). However, there are also measurement points in the tr…[Read more]
Well, my trusty Landmark FM-350 finally gave up the ghost. It was manufactured in 2003, purchased in 2006, and used extensively since then.
For those that are unfamiliar with this now unavailable FM transmitter, it is both Part 15 and Industry Canada RSS210 certified. It contains an industrial grade CD ROM so that it can play prerecorded m…[Read more]
I think we may be losing the forest for the trees.
What makes Part 15 broadcasting unique? Playing the Top 40 hits along with all the other thousands of stations (no matter what genre you’re in)? Reaching massive numbers of people like the much more powerful, licensed stations?
I think it’s being unique. Unique programming. A unique sou…[Read more]
A few comments on the previous posts.
I have no issue with built-in audio processing in a transmitter, as long as it doesn’t add significant cost. It will definitely add some, and I’d rather that cost be put into better base transmitter components. Based on my experience, the Rangemaster (without built-in processing) sounds better than the P…[Read more]
I’m going to take a slightly different perspective here.
Most of these types of discussions end up focusing on those factors maximizing range.
Unfortunately, the FCC (and Industry Canada) rules were designed to limit range. And ultimately, range depends more on location factors (ground conductivity, topography, background noise, even w…[Read more]
There’s nothing to apologize for, AMRadioLegend. We all appreciate updates on this highly anticipated device.
Rich, the issue of the legality of the Talking House & Range Extender has been dealt with extensively here in the past.
From the website of the manufacturer:
“When I connect my Talking House Transmitter to a Range Extender (Antenna…[Read more]
Rich, the Talking House plus coax and ATU as an entire configuration was certified under Part 15.219 by the FCC. That means that it complies with those rules, as long as it is installed as supplied with no modifications made (including attaching a long ground lead). I’m struggling as to why you posted those calculations (someone might infer t…[Read more]
Amateur radio communication at the mw level is almost always narrow band type modes, such as CW. Beacons are essentially a narrow, CW pulse. It’s very difficult to communicate with SSB at those power levels, never mind AM, which requires a much greater bandwidth.
Mind you, it might be worthwhile attempting to use SSB on 13.56, just to see the k…[Read more]
Small towns are disappearing as well, so it’s not surprising that their radio stations are going.
I don’t like it, and don’t agree with it, but it just may be the natural order of things as we get more and more connected in other ways.
It doesn’t mean that we (Part 15 broadcasters) have to give up and/or stop.
Those corporate radio stations…[Read more]
There have been a few people in the past who have used the ISM frequency at 13.56 and have posted about it. If I recall correctly, range was similar to Part 15 AM stations that they had run, but that’s all I can remember (1/2 to 1 mile).
It’s important to note that on the ISM frequency you’re not limited by output power, but by field strength -…[Read more]
Part 15.219 doesn’t limit field strength.
The Talking House transmitter, combined with the ATU (and coax) has been FCC certified, and so if you use it as supplied, without adding a long ground lead to the ATU, the field strength (or the fact that the coax may radiate) doesn’t matter.
The ability to broadcast over the air is a privilege, not a right.
In return for that privilege, the FCC already does set forward a list of rules that stations must follow, licensed and unlicensed. Whether they follow them, and what happens if they don’t, is a matter for FCC enforcement. As Part 15 broadcasters, we know all about t…[Read more]
In the U.S., freedom of speech doesn’t extend to using profane and indecent language over the airwaves; that is already in FCC rules. So the FCC already DOES regulate content to some extent. It wouldn’t be that much of a stretch to have a rule such as Canada has that prohibits knowingly lying over the airwaves. Proving it and enforcing it wo…[Read more]
Every transmitter generates harmonics, and can also generate spurs as well. Part 15 certification means, among other things, that the spurs and harmonics generated are relatively small compared to your fundamental frequency (so many db down).
If the Whole House 3 transmitter is indeed certified, and it is both for Canada and the U.S. (you can…[Read more]
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