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In the past, many of us heard great MW DX with a tuned loop next to the receiver.? However, such a loop now would be likely to hear only local electrical noise from house wiring, wouldn't it??

Yes, the frequencies of our targets may be known. For loops my interests range from the Schumann Resonance around 7 Hz plus harmonics to roughly 2 to 4 MHz. Tuned loops have an extremely high-Q.

Is this a multi turn 1M resonate loop? Do you have a tuning capacitor? What is the frequency range of your loop? Mikek

I make overnight recordings of the NDB band, 200-530KHz. I need a broadband response to do that. Tony AD0VC ________________________________ Sent: Saturday, January 25, 2025 9:17 AM To:

Greetings.? I am a frequent "lurker" and very infrequent "poster" to this forum, my interest is primarily MW.? I usually use a 1m diameter resonant loop and am puzzled as to why resonant loops seem

Chris, knowing your history, I would think you would be the one to put this in a circuit and analyze it, and let the world know if it is useful in the RF receiving world. Most of us don't know how to

Even though I'm always interested in monolithic transistor arrays, the overall lack of data in that datasheet makes me skeptical about using them. I'll stick with the CA/MC/LM3046 for

Megacycles per second was a measure in the past. To be precise, until 1960. With the organization of the International System of Units (SI), the cycle per second was officially replaced by the "hertz"

No-brainer? Who would need to write kk (or Kk)?

Well said. Capitalization (not to mention punctuation) is going down the drain in this age of phone texting. That said... SI missed its chance to dump "k" for "K", so that capitalization is consistent

:-) Martin was prescient as he has anticipated all the problems arising from the first arrangement.

Hi Dave, Are you referring to the balun inside the dummy aerial? If yes, I have initially constructed the dummy aerial as in the top circuit (balun in between single-ended L-network & preamp) in the

Fun discussion. I once found a 31.6875nHz signal in a 50-year barometric pressure record of midnight samples. The rest was 1/f noise. Andrew VK5CV Get Outlook for

Even as a radio hobbyist, I was looking for mHz signals in the 90's. I imagine many more were, for many more decades before me. Here's something to think about, I like to toss it out there every now

44.7 microHertz = [approx.] 6.7067664^12 meters THAT'S a REALLY long wavelength. -- Phil, K0TWA

Physicist here... beware. mHz --> means millihertz,? ?10^-3 Hz MHz --> means megahertz, 10^6 Hz mc? ?--> means nothing... only mc/s, i.e. megacycles per second is a measure of

If the L-network is single ended - common mode for coax - the balun belongs BEFORE the network! The balun converts differential mode to common mode. That's why it is termed a "balun: Balanced (to)

Hi Mike, Thanks for correcting my mistaken assumption. I was thinking that the imbalance can increase 2nd harmonic generation (IP2), which in turn also increases IP3 because the latter also depends on

Chapter 11: The Current Mirror [Analog Devices Wiki] | | | | | | | | | | | Chapter 11: The Current Mirror [Analog Devices Wiki] | | | Locate Full Wilson Current Source in above

THAT 300 Series Low-Noise Matched Transistor Arrays – THAT Corporation | | | | | | | | | | | THAT 300 Series Low-Noise Matched Transistor Arrays – THAT Corporation | | |