Hi One needs to take a bit of care with “big” loops. It’s surprising just how fast the SRF comes down for some configurations ….. I doubt that is an issue for your Tesla coil in free space, but it can mess things up pretty fast when you start to shield things (as you probably should ….).
WWVB should b above 100uV/M in a good part of the country at least part of a typical day. That’s not a crazy weak signal vs what one plays with at HF or higher frequencies. The issue isn’t so much noise floor (as in KTB) but the noise from junk devices here and there and propagated noise from who knows where …. Bob > On Dec 5, 2018, at 5:18 PM, jimlux <[email protected]> wrote: > > On 12/5/18 7:30 AM, Poul-Henning Kamp wrote: >> -------- >> In message <[email protected]>, jimlux >> writes: >>> If anyone has a suggestion for an off the shelf active antenna that's >>> orderable and receivable by Friday, I'd love to hear it. There's 3 or 4 >>> of them I've seen (Clifford labs, DX Engineering has one, I'm sure MFJ >>> has one) >> There is one experiment I have thought about, but not tried: Wind a >> big loop, run it directly into a sound card with microphone input. > > That's true.. many turns would give you more voltage. > > Hmm, I've got a 3 foot long, 6" diameter tesla coil secondary with about 800 > turns on it. > > Aluminum foil over it for an electrostatic shield would be easy. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
