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That is a good procedure (sam's excerpt I believe). I generally do the HV adjustment after the fact. If I've adjusted the osc. that way once, and it has not failed or significantly drifted since I skip that part, and only do the cathode current.
I prefer an analog meter (I just use a Radio Snack cheapie) for this as it allows a more precise dip to be achieved. If it don't want to dip below 220mA something is probably wrong. 185-215mA is where you want to be to baby that hard to get fly.
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