The Reference 6SN7 Thread

Jan 14, 2023 at 4:35 PM Post #8,357 of 10,669
Here’s a nifty way to hold your 6sn7 tubes when soldering! When held in a vice or wedged on it’s side, simply rotate the tube to the next pin!
Not my idea bye the way.

I keep the tubes horizontal, I prefer solder not run all the way to the glass and capillary action draws it in just fine.

A nice way to hold the tube nonetheless. Many of the tubes I replace the solder on are worth $250 up so I am pretty cautious. I might take less care with Fotons.🤪🤪
 
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Jan 14, 2023 at 4:53 PM Post #8,358 of 10,669
I keep the tubes horizontal, I prefer solder not run all the way to the glass and capillary action draws it in just fine.

A nice way to hold the tube nonetheless. Many of the tubes I replace the solder on are worth $250 up so I am pretty cautious. I might take less care with Fotons.🤪🤪
So just how much solder is enough? Just a couple mm? I'm guessing filling the entire pin is overkill
 
Jan 14, 2023 at 4:56 PM Post #8,359 of 10,669
I keep the tubes horizontal, I prefer solder not run all the way to the glass and capillary action draws it in just fine.

A nice way to hold the tube nonetheless. Many of the tubes I replace the solder on are worth $250 up so I am pretty cautious. I might take less care with Fotons.🤪🤪
I keep the tubes horizontal, I prefer solder not run all the way to the glass and capillary action draws it in just fine.

A nice way to hold the tube nonetheless. Many of the tubes I replace the solder on are worth $250 up so I am pretty cautious. I might take less care with Fotons.🤪🤪
Here is my high tech tube holder----make the base angle anything that you need!
 

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Jan 14, 2023 at 4:56 PM Post #8,360 of 10,669
So just how much solder is enough? Just a couple mm? I'm guessing filling the entire pin is overkill
I generally go about half to three quarter of the way in. I use small diameter solder that fits inside the pin so I can gauge how much goes in. It is rosin core of course and I have already put a drop or two of liquid rosin flux inside each pin to cleanse the metal.
 
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Jan 16, 2023 at 8:32 PM Post #8,362 of 10,669
Does anyone know why a NOS tube would test brand new on one triode and practically dead on the second?
I suspect it is a bad connection, resoldering could plausibly fix that.
 
Jan 16, 2023 at 8:40 PM Post #8,364 of 10,669
Does anyone know why a NOS tube would test brand new on one triode and practically dead on the second?
It depends upon how it was used. I have 3 Raytheon 6SN7 that are fine on one triode, and completely dead on the other triode. Not unusual at all. And yes, I have tried resoldering the pins.
 
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Jan 16, 2023 at 10:43 PM Post #8,366 of 10,669
Someone... probably @Mr Trev went on a mono listening binge - one channel only. Or could be a manufacturing defect or bad solder on the pins.
Hey! off the top o my head I only have 2 mono recordings. I'd put the blame on @jonathan c , he has an amp with an actual mono switch. Don't tell me that don't f--- with the space time continuum
 
Jan 16, 2023 at 11:15 PM Post #8,367 of 10,669
Hey! off the top o my head I only have 2 mono recordings.**** I'd put the blame on @jonathan c , he has an amp with an actual mono switch. Don't tell me that don't f--- with the space time continuum
**** did you put them on simultaneously and think that you had stereo (1+1 = 🎼 )🤣?
 
Jan 17, 2023 at 8:17 AM Post #8,369 of 10,669
I have such a dual triod - only one side works and the other side doesn’t even light up.
Is there any use for such a tube?
Only as a test aid if you are troubleshooting and want to identify which channel in a stereo unit uses which section of a dual tube. Outside of that, it is a nice desk decoration. I have 3 of them.
 
Jan 17, 2023 at 12:04 PM Post #8,370 of 10,669
Only as a test aid if you are troubleshooting and want to identify which channel in a stereo unit uses which section of a dual tube. Outside of that, it is a nice desk decoration. I have 3 of them.
Tri-duds? 😳🤣😒
 

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