Hi Jim and all the LF group, I've actually used some core of TV EHT transformer for the output transformer of amplifiers in the 300-500W range and they performed weel indeed; one of these had the two
In an attempt to gain some insight on the behaviour of coils with shorted turns I tried the mathematical way and this is what I found (hope it is correct...): Said L1 = inductance of the first induct
Regarding variometer design, I have put on my site a simple form that computes the main parameters for the classical two coils variometers, both the sliding and the rotating coils types. It is at htt
Hi Martin, maybe it is not exactly the page you are looking for but on my pages, at http://www.qsl.net/in3otd/indcalc.html , you can find an interactive form for computing the inductance of a single-
Dear LF Group, some time ago I was looking for a Linux application to control a trasmitter for sending QRSS and, not finding much, I tried to write one myself. After several weeks of late evening cod
Well, I may be wrong, but the relationship between duty cycle and fundamental harmonic of a rectangular signal should be of the sin(x) kind ( sin(x)/x should be the relationship between the order of
A simplified version of the formula is: L = 0.2 * p * ln((4 * S) / (d * p)) [uH] (all dimensions in meters) where p is the perimeter of the loop, S its area and d the wire diameter. The maximum error
Hello to everybody, regarding the loops inductance, Terman Radio Engineers' Handbook has formulas for single turn loops of many different shapes and also notes that these formulas have all the same g
Hello all, I think that the "ground gain" and the "ground losses" depends on two different phenomena. Ground gain should come from reflections from ground at a distant point (far field) from the sour
Dear LF Group, since I was curious to see the effect of the non-linear processing trick described by Alex and of limiting the input signal, I implemented them in glfer and released version 0.3.1; as
Dear Alex, LF Group, glfer uses X-Windows, and unfortunately the gtk+ library used for implementing the graphical interface seems to be quite resource-hungry... There is a version of this library tha
Dear LF Group, I have just finished a new release of glfer, a Linux application combining a spectrogram viewer and a QRSS/DFCW keyer. As usual, the code is released as open source and can be download
