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6080WA ? ! never !
Posted by coresta on February 4, 2005 at 14:30:06:
Hi ! I'm running an OTL since 8 years now with 6080WA from Radiotechnique . These were given to last 10000 hours on continuous prof and mil service . I've still seen on rec.audio.files that soviet reg tubes like 6AS7 and 6C33 were guaranteed for the FIRST 750 hours . All prof systems had mercury wetted counters so that preventive change could regulary made .
On OTL service, the tests i made on non-soviet ones make me think that with 50 mA / anode, life span can reach 20000 hours ! ENJOY GUYS ! Pierre