Yesterday I decided to measure the actual voltage at base of my short HI-Z verticals while I transmitted on the TX array. Since I first posted about the coupling capacitor failures in these units, I
Hi Guys, Assuming your verticals have a very good insulator there is NOTHING to stop that input capacitor from charging to very high like kilovolt static voltage levels. What I dont understand is why
Can't you install a static drain resistor to keep that voltage from building up so high? 73, Mike www.w0btu.com _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Ref
Hi Lee You are absolutely right, a failed coupling cap should not change the basic amp performance. All that we will get is some of the op-amp voltage leaking onto the element. However, my initial in
I am convinced that there should be a static drain resistor. But since I don't know anything about this antenna, I cannot suggest a value. If I owned one, I might even add a GDT (and/or a low-capacit
Hello again Steve, It seems to me that one could determine what was going on by making two tests. One is to simply bypass the capacitor with a wire to see if its rectifying. The other is to monitor t
Read http://www.lz1aq.signacor.com/docs/Wide_Mag_loop_prot_v1/wideband_mag_loop_protection.htm and look at Fig.5 and 6 diagrams. This is the electric field intensity during nearby lightning strike up