If your antenna is an active one, like mini-whip, I agree. You can find some info about "height gain" in this paper, page 7: SCHWARZBECK MESS - ELEKTRONIK, "Calibration of Vertical Monopole Antennas
Should be here Mike. http://www.observations.biz/MANUALS/General%20Manuals/ 73 Claudio, ik2pii -- Claudio Pozzi - Happy Linux User - http://www.qsl.net/ik2pii -- Email.it, the professional e-mail, gr
Just received SAQ 12.00 UTC transmission in Sormano, JN45PU (50 km N Milano). Many statics, signal about 20 dB over noise. RX: active e-field probe laptop audio board Spectrum Lab program TNX SAQ tea
About 250 km not scheduled QRSS3 QSO. IK4JSJ's Tx was a TDA2002, 3 watt. Fine signal. 73 Claudio, IK2PII -- Claudio Pozzi - Happy Linux User - http://www.qsl.net/ik2pii Attachment: ik4jsj-3w.jpg Desc
SAQ received in Milano, JN45OM. Strong signal, also key-up carrier visible. E-field antenna, notebookPC, SpectrumLab. Attached the tuning waterfall. Claudio, IK2PII -- Claudio Pozzi - Happy Linux Use
May be that with this huge mast you can have some problem with static electricity. Athmospheric Efield, in qiet days, is about 100 V/m, so 10 kV from the top of the mast. Provide a good DC grounding
I used both, 16Fxxx PIC series and ATMEL ATMEGA series. PIC require assembly programming for best performance and require also an hardware programmer. ATMEL can be programmed in standard C/C++ langua
Attached my plot of few VLF stations and noise floor [SpectrumLab noise_n(16000,23990)]. SID started about 29000 seconds after midnight. Sorry for the very unusual time stamp but the recording system
I suggest you this book: Wes Hayward (W7ZOI), Rick Campbell (KK7B), Bob Larkin (W7PUA), "Experimental Methods in RF Design", ARRL, 2003, ISBN # 0-87259-879-9 In Italy you can ask Ediradio (Milano), a
Now we have an info WEB page about IQ2MI 500 kHz beacon. http://lnx.arimi.it/page-id=788 See also our radio club newsletter, with more pictures: http://lnx.arimi.it/Site/public/NR335.pdf TNX for all
TNX for report Nicolas 73 de Claudio, IK2PII -- Claudio Pozzi - Happy Linux User - http://www.qsl.net/ik2pii -- Caselle da 1GB, trasmetti allegati fino a 3GB e in piu' IMAP, POP3 e SMTP autenticato?
Hello Lubos and Rik! TNX for reports, fine picture Lubos. Some info about the beacon. Antenna: the capacitive top loading is 60 meter long, 3 x 0.25 meter spaced 2.5 mm2 PVC insulated wire, the verti
I think that the potting compound is some epoxy, as plastic DIL IC case. So put the defunct unit into a pot filled with N,N-DIMETHYLFORMAMIDE, a flammable and very harmful chemical, see the Safety Ca
A lot of statics but SAQ was stronger by almost 15 dB. Attached the screen capture of the start of transmission. The loss of carrier is clearly visible when the key is up. My setup: Active antenna, e
fair ground conductivity you say! I have read something about "earth level dipoles" experimentation on the desert sand and on snow/glass fair ground. But I don't remember when and where.... 73 de Cla
The emitter follower transistor have a very low output impedance, no problems for receiving purpose but... if you use a long coaxial cable you connect a capacitance of about 100 pF/meter between outp
case 1, Oscillation: you are right case 2, instability: appear as overshoting or ringing response at step or pulse. See the attached image. Sometime instability became self-oscillation if load impeda
Very strong here in Milano, about 30 dB over noise, with usual strong noise level. See screen-shot. Vho is?? 73 Claudio IK2PII -- Claudio Pozzi - Happy Linux User - http://www.qsl.net/ik2pii -- Casel
TNX 73 Claudio -- Claudio Pozzi - Happy Linux User - http://www.qsl.net/ik2pii -- Caselle da 1GB, trasmetti allegati fino a 3GB e in piu' IMAP, POP3 e SMTP autenticato? GRATIS solo con Email.it http:
HI all. I have build a simple tracking generator for the Siemens D2057 selective level meter. http://www.qsl.net/ik2pii/te/D2057tkgen.htm This level meter does not have any demodulated output. I'm se
