[Amps] R. MEASURES PRAYERS ANSWERED

[Peter Chadwick]

Looking back through my old ARRL Handbooks, I see that the parasitic suppressors varied somewhat. Some were the parallel L-R combination used generally today, others were an actual trap ( which seems, prima facie, at the very least, peculiar!) while another approach was a trap, loaded by a shunt resistor, tuned to the parasitic frequency, and coupled by means of a link to the anode circuit. At first sight, such an approach could see a lower series impedance on 10 metres while maintaining the impedance at the parasite frequency, but has anyone here ever tried it? I presume that the idea is, in all cases, to get an anode parasitic resonance below the grid resonance

You could even make the trap out of nichrome and avoid having to have a resistor.
73
Peter G3RZP