The Reference 6SN7 Thread

[DenverW]

Hi! Love the thread!

I was wondering if anyone has insight on how to identify a date code on a rca vt-231. The code seems to be:

SC
278
A

Just trying to figure out how early the tube was made. Any help is appreciated!

 

[bcowen]

Found one of my tubes with a loose base did the ninja search and found that clear nail polish was the popular fix, works!

A good cyanoacrylate glue works well too. But emphasis on "good"....the Krazy Glue brand doesn't qualify (IMO). I've used the Rhino glue for just this purpose for years and have never had a tube base come loose afterwards. Of course, your wife's nail polish (assuming it's your wife's ) is free for you, so there's that. LOL!


https://www.amazon.com/gp/product/B07DGZBFJM/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

 

[Roasty]

Found one of my tubes with a loose base did the ninja search and found that clear nail polish was the popular fix, works!

I had a few tubes bought off ebay with loose bases. Araldite always does the trick for me.. rock solid bases by the next day.

 

[JKDJedi]

A good cyanoacrylate glue works well too. But emphasis on "good"....the Krazy Glue brand doesn't qualify (IMO). I've used the Rhino glue for just this purpose for years and have never had a tube base come loose afterwards. Of course, your wife's nail polish (assuming it's your wife's ) is free for you, so there's that. LOL!


https://www.amazon.com/gp/product/B07DGZBFJM/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

Yes it was free.. wish I had read further into the nail polish fix in applying tape to the tube so that only the base gets the sappy mess....now I have to clean up the thing with nail polish remover. first world problems.

 

[bcowen]

Yes it was free.. wish I had read further into the nail polish fix in applying tape to the tube so that only the base gets the sappy mess....now I have to clean up the thing with nail polish remover. first world problems.

Just wipe off the original silkscreening, write "GE" on it with a magic marker, and anybody looking at it will consider the sappy mess as normal.

 

[JKDJedi]

Just wipe off the original silkscreening, write "GE" on it with a magic marker, and anybody looking at it will consider the sappy mess as normal.

Lol!! Copy!

 

[Slade01]

Lol!! Copy!

Yeah but it will make the resale value plummet to 0. He'd be stuck with that tube for life!

 

[JKDJedi]

Yeah but it will make the resale value plummet to 0. He'd be stuck with that tube for life!

This one is a lifer already before I trashed half the "National",, I'm such a dork! Union is still intact.. read that the grey glass (front page of this thread) are rare and that National never really made VT231 but this tube has VT231 on it . o.O

 

[attmci]

I had a few tubes bought off ebay with loose bases. Araldite always does the trick for me.. rock solid bases by the next day.

All similar epoxy glue, but could have different resistance temp.
This one is no good:
https://www.amazon.com/Araldite-ARA-400001-Standard-2-Tubes-Epoxy/dp/B00AU0MW1K

high temperature resistance (-30 to 65 degree Celsius)


shuuuut, this is "The Reference 6SN7 Thread"

Seems another thread had been screwed.

 

[Roasty]

All similar epoxy glue, but could have different resistance temp.
This one is no good:
https://www.amazon.com/Araldite-ARA-400001-Standard-2-Tubes-Epoxy/dp/B00AU0MW1K

high temperature resistance (-30 to 65 degree Celsius)


shuuuut, this is "The Reference 6SN7 Thread"

Seems another thread had been screwed.

Lol crap that's the one I've been using.. Seems to do the job though. Epoxy still looks good. Used it on recommendations from another forum who have used the same araldite version.

Anyways, to steer things back..

I saw a pair of matched nos Pope 6SN7 tubes. Going for about usd430. Worth it?

 

[attmci]

Lol crap that's the one I've been using.. Seems to do the job though. Epoxy still looks good. Used it on recommendations from another forum who have used the same araldite version.

Anyways, to steer things back..

I saw a pair of matched nos Pope 6SN7 tubes. Going for about usd430. Worth it?

Mullard produced ECCXX, but not 6SN7GT.

https://forum.bottlehead.com/index.php?topic=663.1935

 

[cddc]

All similar epoxy glue, but could have different resistance temp.
This one is no good:
https://www.amazon.com/Araldite-ARA-400001-Standard-2-Tubes-Epoxy/dp/B00AU0MW1K

high temperature resistance (-30 to 65 degree Celsius)


shuuuut, this is "The Reference 6SN7 Thread"

Seems another thread had been screwed.

I believe you mentioned using carpenter's glue to fix loose base last time...did it work well?

 

[attmci]

I believe you mentioned using carpenter's glue to fix loose base last time...did it work well?

Not me, Sir.

 

[cddc]

This one is a lifer already before I trashed half the "National",, I'm such a dork! Union is still intact.. read that the grey glass (front page of this thread) are rare and that National never really made VT231 but this tube has VT231 on it . o.O

LOL...I'd rather have a loose base....hope your glue-applying skill improves, don't forget to find a GE to practice on, as always

Never had a NU VT-231, but the one in the photo looks like an RCA grey glass except having the "NU VT-231" stencil on it.

 

[cddc]

Not me, Sir.

My bad...sorry.

Gotta be someone else, just curious to know the result