16-04-2011, 08:17 PM
UL84 and UY85 at a fairly good guess. The one with the bulkier electrode assembly is the UL84. you can try applying a voltage to the heater pins. Start low and work up to a sensible glow while measuring volt and amps. UY85 is 38V, 100mA, UL84 is 45V 100mA.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv







