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7th August 2010, 12:46 AM
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#1 |
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diyAudio Member
Join Date: Nov 2008
Location: Santa Barbara
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aghhh is my tube okay?
I accidentally ran a 6922 at 12v for 20 seconds or so. it smoked for a second and then i figured it out. after setting the voltage down to 6 volts it appeared to work fine again. Anyone have experience with this? Did i just totally rape the sonic characteristics of the tube? is it going to die soon now? it seems to sound ok. Thanks...
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7th August 2010, 01:50 AM
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#4 |
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diyAudio Member
Join Date: Jun 2010
Location: SinCity
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LOL I hooked one of my 866a merq rectifiers filament up to a 6.3v tranny, 24 hours later it was fine.
fil in a 866a is rated for 5 amps @ 2.5v |
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7th August 2010, 02:18 AM
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#5 |
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diyAudio Member
Join Date: Sep 2006
Location: Pleasant Hill, CA
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Consider like kind of cathode cleaning happened.
 It may measure even little bit better now.
__________________
The devil is not so terrible as his mathematical model! Wavebourn: We Create Creativity! |
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7th August 2010, 03:05 AM
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#6 |
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diyAudio Member
Join Date: Sep 2003
Location: Alps:Tube amp designs over 150W, SMPS guru.
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There's stacks of this type around from most vendors & going pretty cheap.
6922/ECF80/7643/E80CF and the list grows. By coicidence with the current limit set wrongly on psu, I ended up having the same results with a 6550 but with 30V instead of 6.3V for 1/2 minute. Still works fine.. richy |
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7th August 2010, 05:47 AM
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#7 | |
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diyAudio Member
Join Date: Aug 2009
Location: Sacramento
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Quote:
Makes you pucker a bit! What I learn is a function of what I smoke raised to the power of what it cost. DT All just for Fun! |
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8th August 2010, 08:19 AM
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#9 | |
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diyAudio Member
Join Date: Feb 2009
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Quote:
As for your tube, it should be fine, 20 seconds is nothing. I once ran a 6.3V heater tube with 16V supply which was meant for series operated version of the same tube for minutes before I realized what was going on and aside from possibly shortening tube's life due to increased emmission while operating at too high a heater supply (I was monitoring cathode current, it went up by at least 25% from normal before I switched everything off) it's still working just fine.
__________________
mod verb, transitive /mod/ to state that one is utterly clueless about the operation of device to be "modded" and into "fixing" things that are not broken; "My new amplifier sounds great so I want to mod it." |
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8th August 2010, 02:57 PM
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#10 |
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diyAudio Member
Join Date: Jun 2010
Location: SinCity
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Yea, these tubes a a lot stronger then the parts they replaced.
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All my battles have been won, But the war has just begun. |
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