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...
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
fil in a 866a is rated for 5 amps @ 2.5v
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
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
Attachments
Hello Nate805,
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!
Running with a very hot heater for a short while is something they do at the factory to get the cathode emission started. Not recommended to do it again, but not as serious as you might think.
Tubes (all glass such as 6922) don't smoke. If you saw smoke something else must have been overheating (probably resistors). You should check the circuit and consider replacing any burnt/overheated components to avoid any problems in the future.
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.
- Status
- Not open for further replies.