Boogie Chillen said:In my FM 100 manual it states that for the 25W or low setting the wiring is switched from pentode to triode. The half setting puts 2 power tubes into standby reducing the power by half.
golfnut said:Boogie Chillen said:In my FM 100 manual it states that for the 25W or low setting the wiring is switched from pentode to triode. The half setting puts 2 power tubes into standby reducing the power by half.
So if I am to assume that one of my 6L6 power tubes is put in to standby for the half power switch then my question is, am I wearing out one of the tubes more than the other? I've been running on half power alot and I'm thinking that 80% of my use is going to be on half power.
Boogie Chillen said:golfnut said:Boogie Chillen said:In my FM 100 manual it states that for the 25W or low setting the wiring is switched from pentode to triode. The half setting puts 2 power tubes into standby reducing the power by half.
So if I am to assume that one of my 6L6 power tubes is put in to standby for the half power switch then my question is, am I wearing out one of the tubes more than the other? I've been running on half power alot and I'm thinking that 80% of my use is going to be on half power.
This is from the Mesa website on the amplifier features tab for the Fillmore 50, under Power Amp Details,
"MESA's proprietary Dyna-Watt™, Class A/B Power Amp with a single, global Full/Half Power Switch - Each setting features a different wiring configurations, Pentode or Triode respectively. Choose from 2 power tubes operating in Class A/B Triode for lush harmonics and a sweet, liquid feel at lower volumes, producing 20 (Clean)/28 (Max) Watts or; 2 tubes operating in Class A/B Pentode for maximum power, punch and clarity, producing 40 (Clean)/60 (Max) Watts."
I don't think that the FM 50 has a standby mode for half the power tubes like the FM 100 has. All your power tubes are running in each power setting, just different wiring.
Have a look at pg 24 of your manual, the tube replacement diagram, it shows what is going on for each power setting.
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