[Sideband]

Don't know where on earth your AC voltage is coming from unless it is ripple or just a spurious reading. The only places you should have AC are the mains input and feed to the anode of the rectifier, the heaters and (if fitted) the pilot lamp(s). If there is no DC across the resistor, check the parallel electrolyitic (if fitted) in case it is short circuit. If that is OK and the resistor is measuring 220 ohms then it's likely the valve is duff. You need to carefully check all connections around the valve and the valveholder itself. Check of course the basics such as the valve is actually lighting up!! If everything seems OK then it's probably time for a new valve. UCL82's are plentiful and easily obtainable.