Oh yes,be careful about this precious piece of measuring equipment. But then,with < +/- 0,2dB you come out at an uncertainty within of around +/- 42W at 900W. 73 Clemens DL4RAJ -- Original Message --
Hi Uwe, I could'nt find any info about your audigy regarding input Z, but soundcards use to have an input Z of several kOhm,e.g. a Delta 44 has 10k. http://www.nitehawk.com/sm5bsz/linuxdsp/hware/opti
Hi Roelof, and at 8.970 kHz it is 7.7 dB. That's pretty close to IK1ODO's meaurements some time ago, he measured -7,9dB at 10kHz. 73 Clemens DL4RAJ Hello Paul, Thank you very much indeed for the desc
Hi Daniele, according to your description your magnetic loop has an inductively coupled secondary coil, the pickup coil as you call it, which presumably performs a step-down transformation of around
Hello Hans-A. solid aural copy with up to S7 on an untuned 88m wire. A bit stronger than DI2AM around 70Hz up. 73 Clemens DL4RAJ Loc:Südostbayern,12,90006°O/48,4150°N (Gridloc:JN68KJ) -- Original Mes
Hi Stefan, ...But thus the internal C is high, so stray currents occur that increase the resistive losses. Additionally the >proximity effect plays its role... Do you mean circulating currents by 'st
Hi Stefan, this time I'm at home and will be watching out for your signal. RX is a Perseus,antenna is my 2x46m dipole with 42m open feeder. The latter is running 8m vertical out of the shack,the rest
Hi Mal, you might buy the service manual ("Serviceunterlage") for Euro 15,60 from http://www.rainer-foertig.de/unterlagen/WG-3_2009.htm I'm not sure if the schematics ("Schaltbilder") are included be
Is it still on this evening Just now,18.00 UTC, no alphas there. Usually they are quite good audible (and even more visible) here with E1800,Perseus and even with a Sony CRF-1 on a long wire and prob
At 10 kHz the attenuation is 8 dB, so the stated noise figure of 27 dB at 9 kHz complies with this. Exactly. And the qst-quoted MDS of -127dBm @ 2.4kHz (surley somewhere >1MHz ) which means af NF of
Looking on the VLF spectrum I notice that noise at 4kHz or lower is abt 30dB less than around 10kHz or higher (see screenshot). So wouldn't it make sense to trx around 4kHz? Wouldn't the 30dB noise a
Markus,Jim, the point of Jim was (i believe) to take a dummy with approximately the same impedance of the antenna (at the rx input) to have a more exact reference for comparison of rx or preamp noise
Now,at 22.53z, alphas stronger than in the afternoon. See screenshot. 73 Clemens DL4RAJ -- Original Message -- From: [email protected] Clemens Paul To: [email protected] rsgb_lf_group@blackshe
Dito here at 11.00utc. Audible and visible. 73 Clemens DL4RAJ -- Original Message -- From: [email protected] mal hamilton To: [email protected] rsgb Sent: Thursday, June 03, 2010 10:10
Jim, Since the RX or preamp noise level can be strongly dependent on the source impedance, I can not confirm this with my RX,a Perseus SDR. When I switch on 9kHz or any other qrg between 50 Ohm, open
Hi Joe, from what I can find in the web it tunes down to (only) 15kHz. That's probably because below 15kHz synthesizer sideband noise would be an issue. My Sony CRF-1 tunes down to zero Hertz but you
Hi Daniele and Rik, thanks for your replies. The low noise below 4kHz is even more impressive to watch live on Perseus when static crashes periodically shoot the noise baseline quickly upwards. The b
Hi Wolfgang, A radiator with a relatively small active length should more or less have a spherical pattern. It is a quite common misbelief that a small antenna (with one active element) has a spheric
Uwe, you can "build" it very easily following Johan's instructions on his web page. :-) ,copied below: -- Download saqrx06.zip (below) and unzip the file in a folder of your choice. There is only one
Hi Roelof, thank you for sharing your SAQ reception with us. It's a very good benchmark for comparisons and Perseus is a great tool to make such file sharing possible. My Miniwhip is only 30cm above
