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Title: Viking Ranger II neutralization on 6 mtrs Post by: n4wc on January 29, 2011, 11:02:38 AM My Ranger II works very well on 160 thru 10. It will sort of tune up on 6 but most of the time it oscillates and the grid current goes to ~5-7ma and the plate current might drop off to ~50-60ma, or go above 150ma. When I move the FINAL adjust to ~98/99 from ~94(kinda where it is supposed to be), it is as if a switch is thrown and the above occurs. If I keep the grid at 1.5ma and the plate to ~120 it seems to be more stable, but it won't stay very long, then back to oscillation. Multiple tube swaps; 4 different 5763 and 6CL6 and 6146A. This xmtr is stock and has been cleaned and recapped, and 'reresistored' as necessary. I found one cracked solder joint at the top of the plate choke, but fixing that didn't help. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Thanks for any insight into this opportunity. Bill |