inally I put a 5.6k ohm wire wound resistor between grid 2 and the V+. This reduced some of the red plating and dropped current consumption, and also increased power output! God why didn't I think of that before? ;D
I betcha a wire lead + g2 and anode transconductance made a GHz oscillator that was so mismatched in the output tank, that's why it redplated.
inally I put a 5.6k ohm wire wound resistor between grid 2 and the V+. This reduced some of the red plating and dropped current consumption, and also increased power output! God why didn't I think of that before? ;D
I betcha a wire lead + g2 and anode transconductance made a GHz oscillator that was so mismatched in the output tank, that's why it redplated.
Cheers!
Nah the redplateing was a direct cause of a random old tube that I happened to have only one of and build an entire RF amplifier around lol ;D
Like I said earlier in this post the tube only glows on one specific area of the plate. That part of the plate also has a light outward bulge on it. When I took this tube years ago from the aircraft transceiver it came from it looked bulged on the plate even then as I recall. So whatever damage was done isn't my fault haha. The thing runs great though, even with its orange plate glow.
I figure what is the worst that could happen? I've been running it like this for 2 years now and it still works as good. I'd imagine that a NOS tube would be a lot better though. Just need to save up a few bucks instead of wasting it on titty bars.