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Messages - KaySeeks

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This was telegraphed* a long time ago.

*Appropriate since this is a forum on radio

If you're listening on AM you would not notice a "wobbly" carrier.

  • If there is enough frequency movement (for example, strong FMing) they would notice it as a very distinct and recognizable form of distortion.
  • If they are using an SDR (which has nothing to do with reception modulation mode), they could observe it visually.

Everything in RF needs tweaking. It's rare for something new to work flawlessly the first time you turn it on without optimization. This isn't house wiring where it either works or it doesn't.

Understand that there will always be a certain amount of (unavoidable) parasitic capacitance, inductance and resistance that can't be predicted easily. Where I am going with this is that they may be working, just not at the frequencies you intended. So when you follow a pre-printed formula for capacitor and inductor values for your ~800 KHz filters, you may not actually get what you had intended due to the formulas not taking into consideration parasitics and that may very well explain what you are experiencing. The circuit in a tin box has some long leads on (for example) the capacitor. Shorten those up. Those leads are represent parasitics. I see room for optimization in that box. The frequency of resonance may change when you put a cover on that box.

Since you more than likely do not have a vector network analyzer at your ready disposal :D, I suggest that one place to start to determine if they are working at all is by tuning around the whole MW band and see if you can notice a drop in the noise floor or drop in any other signals at any other frequency. If you have an SDR, use the display in wide band mode to try to gauge this.

For something like this, it's probably better to build with variable components, if possible, just because it will need tweaking.

FM Free Radio / Re: "Way High Radio"-Colorado Pirate Bust
« on: March 01, 2018, 0412 UTC »
Thanks for that.

Latin American Pirate / Re: Latins 21 Feb 2018
« on: February 23, 2018, 0310 UTC »
et tu, Brute?
e pluribus unum?
boni pastoris est tondere pecus non deglubere?

Ohhhh, you don't mean THAT kind of latins.

quidquid Latine dictum sit altum videtur

Hearing them with an average signal on an SDR in Brazil tonight. SIO 222.

SIO 323 in Virginia.

2322 SSTV, then off?

Good signal into South Florida at 2249. SIO 414
Still on but signal weaker at 2327.

Sorry to read.  :'(

General Radio Discussion / Re: Longwave Pirates?
« on: February 16, 2018, 0322 UTC »
I've clamped on to a strand of barbed wire fence as a ground plane for verticals. Works fine if you've got a tuner. There was someone I heard about who hooked into a guardrail for a SW tx and was well heard, but I don't recall who it was. That RF has to go somewhere.

I've used chain-linked fence as part of a ground radial system at HF. If you got it, might as well use it.

General Radio Discussion / Re: Longwave Pirates?
« on: February 16, 2018, 0320 UTC »
When I was 14 or 15 years old, I made a fantastic LW TX from my Radio Shack 150-in-1 Electronic Project kit.

I was shooting for the MW band but when I first turned it on, it was apparently operating in the LW band and soon figured it out when I dropped some capacitance in the tank circuit and I got it into the MW band and could finally hear it. In any case, once I got it going, I dropped it down to LW later (to avoid daytime MW interference) and got strong enough to be heard on the old Phillips radio on the other side of the house that could tune LW.


No QSL cards issued though.  :P

General Radio Discussion / Re: The Luxembourg Effect. Ever heard it?
« on: February 16, 2018, 0305 UTC »
Sure. It was proposed back in the 1930s. It even has its own Wikipedia entry: https://en.wikipedia.org/wiki/Luxemburg%E2%80%93Gorky_effect

If you want to hear it in action live, go to the UTwente SDR and tune to 162, where Radio France  used to be (until Jan 1, 2017). They left the TX on (without normal voice modulation) because, in addition to Radio France programming, it was carrying the digital modulation of the national time signal and they didn't want to remove access to that by shutting down the TX completely. https://en.wikipedia.org/wiki/Allouis_longwave_transmitter

In any case, you can hear voice modulation underneath that is co-incident in time with another station (forget which one). While I guess that could be a spurious product in the SDR, it is marked as being the Luxembourg Effect on the SDR dial. (I assume others have heard it on other receivers to make it not just an artifact of the SDR.)

HF Mystery Signals / Re: HAARP 6300 KHz 20 Dec 2017 0747 UTC ?
« on: February 11, 2018, 1046 UTC »
For future reference you might want to include more detail in your screen shots. 

Fair enough. I wasn't planning on posting it or even researching it at the time so wasn't concentrating on the details.

With that said I suspect each graduation is 10 kHz for a couple of reasons.

Seems right.

If it is another heater there are many possible sources, remembering what RX you were using at the time might narrow it down a bit.

Possibly KA7U in western Idaho but I am not at all sure.

Instead of Coast FM, today it's Energy FM but also from Tenerife. Similar programming - non-stop dance tracks. Programming was parallel to this: http://streema.com/radios/Energy_FM_92.1

Almost listenable in the Netherlands on a portable and a wire. Then I turned on the Twente SDR for the synchronous detector and SIO 242 there.
Checked some USA east coast SDRs and several have carriers but only one in Acton, MA had a listenable signal.

Tuned out 1030 UTC.

I guess he was trying to get your attention

Achievement unlocked.

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