I am enjoying this but was there no consideration of the likely load impedances needing to be fed? Surely all the finer points of line loss are wiped out if a mismatch or lossy matching network becom
which raises the question I have often wondered about. When I started in ham radio all coax was post-war surplus 75 ohm. I assumed in my youth it was to match a free-space dipole !. When I came back
Laurence and othersWhile it's quite likely that the standard copper pipe story is true, the basic physics of the issue are fairly simple- for a given coax outer diameter it can be shown there is a br
Hello Walter and group, < I think 60 Ohms was once popular because it was one quarter of the once widely used symmectric 240 Ohm systems. Easy to build baluns from 240 to 60 Ohms. I remember our old
Dear Lowfers, for my experiments I use commercial dummy loads, like my Rohde & Schwarz RD1/60, oil filled, 1 kW /60 Ohm with monitor output attenuation of about 40 dB with Dezifix-connectors (the sex
Dear all, around 1959, when I joined Rohde&Schwarz in Munich, 60 ohms has been the standard cable impedance in Germany for all broadcast and television transmitters in the fifties and for other comme
which raises the question I have often wondered about. When I started in ham radio all coax was post-war surplus 75 ohm. I assumed in my youth it was to match a free-space dipole !. When I came back
I found a thread that says something to the effect that 50 ohm was chosen (in the US) during the war period because of the standard diameters available in copper tubing at the time (!) - that sort of
DK8ND's email raises an interesting point. Can any of our German friends tell me why an impedance of 60 ohms was popular in Germany for some time but not anywhere else? Walter G3JKV. -- Checked by AV
