Markus,
Great signal, congratulations.
Was your ERP ~ 5uW?
I had hoped to be operational (RX and TX) with the new stable oscillator last weekend but work and other nuisances interfered. I hope to complete that work this weekend, and try your TX stabilization technique next week; all of your work in this area much appreciated.
73, Jim AA5BW
Uwe, yes - the left channel picks up the electric field near the antenna, using a 20 cm piece of open wire (level about - 30dB at L1). Both generators are active: the test signal generator feeds the phase reference to R5, and the digimode terminal delivers the output to the PA through L5.
Lubos, I was positively surprised to see about 20 dB SNR on your excellent Apollon temple receiver.
Peter, I think the signal did leave a 10 dB dash in your 238 µHz window. Not sure about that 47 uHz pixel, but the two-hour transmission would really be too short for that bandwidth.
No trace yet on Stefan's new window, but this may well be due to the midday propagation minimum which we have often experienced on 8970 before.
Thank you all for the grabbers and comments!
Sent: Friday, February 07, 2014 2:06 PM
Subject: Re: Re: VLF: 8270.002
Hi Markus,
so you feed the left channel with your eradiated signs via a piece of wire ?
what abt the signal generator and the digimode modulator, is one of them switched off?
ga
Uwe
Von: [email protected]
Gesendet: 07.02.2014 12:37
An: [email protected]
Kopie: [email protected]
Betreff: Re: VLF: 8270.002
oops - that should be 8270.002! Old habits persist ;-) 73, Markus
Sent: Friday, February 07, 2014 12:30 PM
I'm currently running a short test on 8970.002 Hz from 10 to 12 UT, using SpecLab phase-locked to 1-pps. The antenna is swinging in the wind so the current is a bit variable (0.25 to 0.3 A), but the feedback scheme should keep the radiated phase steady. So far a good peak has become visible at OK2BVG.
