Hello Chris, The reason is that the voltage drop across L2 is almost twice as high as across the outer coils, see attached spice simulation. The yellow trace represents the voltage across L1,green ->
Hello Chris, Markus (DF6NM) has given an excellent expanation in his posting from 7/14/2007: "...the PI-type combiner per se is not the problem. All I was trying to say is that you have to prevent it
Hello Chris, Look what the mini ring core calculator is showing (see attachment) and draw your conclusions. The calculations are completely based on amidon data. I've chosen 600V RMS ,that's the volt
Hi Marco, It is indeed. B =V/ (4.44*F*N*A) No,but I was referring to V across L2, not across the load. See the three attached spice simulations. 73 Clemens DL4RAJ Attachment: Voltage across R.JPG Des
Hi Chris, This would be possible but more or less lossy. What is the impedance as seen by your AIM when you measure on the secondary side of the 1:1 isolation transformer with antenna and feeder conn
Hi Chris, Just to be sure, you I'm not sure if I understand your description correctly so I try with a block diagram. Is it like this? TRX - short coax - autotransformer - longer run of RG-213 - isol
Hi Chris, ok, I hope I have now understood your set up and what you may possibly want to change. Present configuration: And from an earlier post by you: So you want to modify the combiner-autotransfo
Hi Chris, In my first reply from 24.6.2017 "This would be possible but more or less lossy" it was not clear to me that you would possibly like to tap the transformer *of the combiner* and that the LP
Hi Chris, At a given power into a load voltage increases at the sqrt of increasing R because U = sqrt(P*R). When a complex load comes into play V increases with |Z| which is sqrt (R^2 +X^2) So at res
Hi Chris, at the risk to state the obvious: A LPF of a solid state PA has 50 Ohms in- and output impedance. A tube type PA needs a LPF which transforms from several kOhms on the tube side to 50 Ohms
Hi Wolf, ok about the tank circuit. Do you think that it does not provide enough attenuation for the harmonics so that you need an extra LPF on LF? 73 Clemens DL4RAJ
Hi Lubos, go to http://www.classicbroadcast.de/telefunken_download.html then press contr+f for searching the site. Enter just LW 638 (the space is important!) in the mask and you'll hit immediately t
Hi Claudio and VLFers, Also this book is downloadable: http://www.introni.it/pdf/Watt%20-%20VLF%20Radio%20Engineering%2014.pdf I've just verified that the link is still valid and working. 73 Clemens
... ... On page 40 where the capacitance formulas are given reference is made in a footnote to a paper from 1926 and to Terman's Radio Engineers Handbook from 1943. 73 Clemens DL4RAJ
Mal, I can decode you with 0dB. 73 Clemens DL4RAJ =link&utm_campaign=sig-email&utm_content=emailclient> Virenfrei. =link&utm_campaign=sig-email&utm_content=emailclient>
There is a article from ARRL,see http://www.arrl.org/news/tiny-lf-signal-makes-the-hop-from-newfoundland-to-the-uk = sent from my gpo creed 7b teleprinter + + 73 Clemens DL4RAJ
Hi Stefan and MF'ers, And DL3NDR is transmitting *continously* in WSPR since hours. Maybe his PTT keying has get locked? I also see a ca. -40dBc sideband 60Hz above his tx qrg on two different receiv
Hello MWers! I see and hear a strange noisy broad signal sweeping between about 475,2 and 475.6kHz. On the waterfall it looks like a jamming signal from a SPSU. But I can see and hear it also on the
