radio8z replied to the topic The Legacy 1640 AM on Terk AM Advantage 1 1/4 miles away!! in the forum Receivers 7 months, 4 weeks ago
Thanks for sharing your experience and demo via video.
What may happen with this idea for an improved receiver/antenna scheme could be similar to a subscription service where people will be willing to pay to gain access to programming they value with a slight difference being that the hardware expense is reasonable and is a one time only…[Read more]
A recent thread here reported on a NOUO (Notice of Unlicensed Operation) regarding interference to the aircraft band caused by a FM transmitter. Let’s do a review of what technical problems can cause interference, first for FM.
Harmonics are frequencies which are integer multiples of the intended carrier frequency and which are…[Read more]
When lead paint is found on children’s toys or emission cheating by a car manufacturer is found it seems the government action is swift and sure, so why not in cases such as this. Enforcement needs to include the manufacturers and distributors in a greater extend, and to a lesser extent to end users.
Few end users have the knowledge or…[Read more]
Thanks for the reply. I asked question 1 with the thought that it was perhaps “perfectly acceptable” to the Part 15 broadcasters based on my reading of years of posts here and elsewhere, perhaps due to either lack of enforcement or knowledge of the .219 restrictions and your response suggests it was a change in FCC interpretation, or…[Read more]
I have a Sony ICD-PX312 which I chose because it appears as a disc drive using Windows Media Player Classic. No special software needed to retrieve the files.
The only down side I encountered, and something to be aware of for any of these tiny recorders, is that it is easy to accidentally hit the wrong button just by handling the unit. You m…[Read more]
Thanks for making and posting this video. It was a bit hard for me to hear the difference as you moved/tuned the antenna due in part to the background traffic noise. Otherwise, nice job.
Artisan Radio wrote “Back in the early to mid 2000’s, it was deemed perfectly acceptable to elevate a transmitter and ground that transmitter to a metal mast. A decision not to allow that type of installation was made in the latter 2000’s, and yet no rules (or physical principles) were changed.”
First question, “deemed perfectly acc…[Read more]
Thanks, AMradiolegend, for the history behind the back forty. Where I grew up most of the farms were/are 80 acres though I did not know why until now.
Unfortunately, my “back forty” is more like forty feet rather than 40 acres but I found by trial and error that the noise generated by devices inside my house do not affect reception when using…[Read more]
More information about this solution will be welcomed here.
One thing which I am particularly interested in is how noise free is the received signal? Can one listen for minutes, hours, or beyond without listener fatigue?
It seems that one of the forgotten arts to achieving range with radio is that the receive antenna deserves as much attention…[Read more]
Wow! What an effective response to a problem. Violators who could not afford the possible $10,000 fine but now, faced with the new fine, by golly they will certainly abandon their evil ways. Legislators always want to appear to be problem solvers but usually have no motivation other than appearances.
In the many decades in which I have been li…[Read more]
There is an old adage in research which says “with the data you don’t have we will establish what you don’t know”. In this case we have almost no data so I conclude we don’t know much of anything. Either seek data from the source(s) or quit speculating about it.
Sorry if you don’t like this but hobby broadcasting is essentially regulated by…[Read more]
Nice story, Brooce.
What if you had installed hidden wires to feed the motor power, you would probably still be laughing about your dad’s reaction had this been the case. Such imagination and the drive to actually try an experiment is a valuable trait.
Related to such trickery, as a really young fella I had read about a thing called “Yehudi’s…[Read more]
It has been fun to read some of the experiences of yesteryear posted in another thread (https://part15.org/forums/topic/knightkit-am-broadcaster-a-close-look-inside/) so here’s another adventure from then that some may want to try, or at least ponder.
Going back to about 1962, I had read about the prohibition of amateur radio activity during…[Read more]
I also built one of these circa 1959 and still have it and it still works. Out of curiosity, a few years ago I measured the DC power input to the “final” stage (the oscillator) and if memory serves it was about 180 mW.
My original installation had the transmitter mounted on a shelf about a foot below the basement ceiling with the antenna wire…[Read more]
For some of us this will be a nostalgic look back to the days of yesteryear, for others this can be informative about radio technology. There is a youtube site titled Mr. Carlson’s Lab where he just posted a rather long look inside the KnightKit AM Broadcaster. It is long because he includes a lot of background information which could be of i…[Read more]
A few days ago I as mecasting a performance of Beethoven’s Ninth Symphony and was monitoring the audio using my reconditioned H. H. Scott LK-48 amplifier tapped into my audio chain. All was well until about half way into the first movement I noticed a bit of distortion in the right channel.
Inspection from the top of the amplifier revealed one…[Read more]
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