Can you do anything to make power tubes last longer ?


Besides using them less.

inna

 

@tomic601’s mention of Roger Modjeski leads me to suggest that for longest tube life, they can be installed in any of Roger’s Music Reference amps (RM-9, RM-10, RM-200), in which output tubes last about 10,000 hours. Compare that with ARC amps.

 

Yeah, miss Roger Modjeski - what a treasure he was.  He was the master of tube conservation.  Gave me a good tongue lashing for biasing my RM10 wrong and set me straight for an hour on the phone.  Never wore out or shorted a tube in over 10 yrs on my unit.  Sorry I sold my RM10MkII.  He wrote on his forum "don't worry about handling tubes w/bare hands just get the peanut butter off your fingers".  Just got a matched quad of EL34's from RAM tubes yesterday. 

Your bias current is usually measured across a 1 ohm resistor so that mV=mA.  The meter measures volts but because the resistance is 1, then the number is the same.  So a custom meter will measure volts, but it will say amps.

if your maker didn't order a special meter dial, it may say mV, but is actually reading mA.

There is a post above that contradicts this and I'm not sure what the poster meant.

Jerry