The Reference 6SN7 Thread

[Wes S]

IMO, mildly useful if you have a microphonic tube. Otherwise of no value.

I tried them and they helped just a little bit with a slightly microphonic tube, and in my opinion were not worth what I paid for them. For my really microphonic tubes, they did nothing. I also like the look of just the tube by itself. I believe others have had good experiences, and maybe they put their in a better position on the tube?

 

[mourip]

IMO, mildly useful if you have a microphonic tube. Otherwise of no value.

I have tried silicone dampening rings, tube shields and also Mapleshade brass weights.

I either heard no change or, unfortunately, found some "life" was removed from the music...making the name "tube dampener" all too real

 

[LoryWiv]

UltraSonic Rx Damping Instrument Snake Oil?

I actually put these dampers on my Psvane 6SN7 (stock drivers in Feliks-Audio Elise) just last week, and placebo or not feel it added a bit blacker background, instrument separation and clarity to the mids, a little better treble extension. Differences are small but positive, and it's relatively affordable. They offer a 60 day return, so may be worth trying for yourself.

 

[JKDJedi]

What year did they change the RCA logo on the 6SN7GT? I just got one in but the date codes are half rubbed off trying to figure out which decade this tube is.

 

[Ripper2860]

The big meatball logo is typically '40s, IIRC.

 

[Wes S]

The big meatball logo is typically '40s, IIRC.

I concur.

 

[JKDJedi]

Great Write up---> https://www.effectrode.com/knowledge-base/the-6sn7gt-the-best-general-purpose-dual-triode/

 

[sennfan83261]

The big meatball logo is typically '40s, IIRC.

I think I answered the question in another thread, but I want to include it here mainly for the link to the guide on RCA's naming convention for their tubes.

If "G5" is indicated on that 6SN7GT (it looks that way to me), then it is a private-brand non-OEM tube with a shipping date of June, 1945 (see "2. RCA DATE OF SHIPMENT" in the source below). From 1936-1945, RCA tube date codes went by "Letter-Last Digit of the Year-E," where the "E" is indicative of an OEM shipment. If the terminal "E" is missing, then it is a non-OEM shipment. Hope this helps!

Source: http://pax-comm.com/rcadates.pdf

 

[mourip]

Great Write up---> https://www.effectrode.com/knowledge-base/the-6sn7gt-the-best-general-purpose-dual-triode/

Excellent indeed. Nice to see the 7N7 mentioned.

I have owned and tried many of the best 6SN7 variants, including the TSRPs and found the 7N7 to surpass them all. Very clear with linear fidelity throughout the bandwidth.

They are cheap and all you need is a pair of loctal to 8 pin adapters easily found on eBay. If you need a 12SN7 you can use a 14N7. I uses these in my Linear Tube Audio MicroZOTL v2 and ZOTL Preamp.

 

[attmci]

Excellent indeed. Nice to see the 7N7 mentioned.

I have owned and tried many of the best 6SN7 variants, including the TSRPs and found the 7N7 to surpass them all. Very clear with linear fidelity throughout the bandwidth.

They are cheap and all you need is a pair of loctal to 8 pin adapters easily found on eBay. If you need a 12SN7 you can use a 14N7. I uses these in my Linear Tube Audio MicroZOTL v2 and ZOTL Preamp.

It depends, it depends.

 

[JKDJedi]

It depends, it depends.

Excellent indeed. Nice to see the 7N7 mentioned.

I have owned and tried many of the best 6SN7 variants, including the TSRPs and found the 7N7 to surpass them all. Very clear with linear fidelity throughout the bandwidth.

They are cheap and all you need is a pair of loctal to 8 pin adapters easily found on eBay. If you need a 12SN7 you can use a 14N7. I uses these in my Linear Tube Audio MicroZOTL v2 and ZOTL Preamp.

Might just grab a 7n7 for collection sake, not at all expensive but little here and a little there adds up! Anyway, quick looking in revealed that most 7n7 tubes were made by Sylvania, no surprise there I quess.

 

[Slade01]

Might just grab a 7n7 for collection sake, not at all expensive but little here and a little there adds up! Anyway, quick looking in revealed that most 7n7 tubes were made by Sylvania, no surprise there I quess.

Hey JKDJedi - so you gonna run a 7n7 in the DV? Challenge Accepted?

 

[JKDJedi]

Hey JKDJedi - so you gonna run a 7n7 in the DV? Challenge Accepted?

And a (1950's?) Marconi 6CG7..but don't tell no one,

 

[mourip]

It depends, it depends.

Depends...on?

Did you want to contribute something?

If you are saying that everything is system dependent and viewed according to subjective taste then I would certainly agree. Most appraisals of tubes on this thread are subjective. If enough folks talk up a tube then it becomes popular and everyone wants to try it. I am just trying to offer an alternative for those who want to try an inexpensive tube that they might really enjoy.

 

[JKDJedi]

Depends...on?

Did you want to contribute something?

If you are saying that everything is system dependent and viewed according to subjective taste then I would certainly agree. Most appraisals of tubes on this thread are subjective. If enough folks talk up a tube then it becomes popular and everyone wants to try it. I am just trying to offer an alternative for those who want to try an inexpensive tube that they might really enjoy.

All of the above, and maybe the TSRP comment?? Hey, in my best Danny DeVito voice... " Forget About It"! Jokes aside, thanks for the 7n7 comment, I rushed and ordered one after reading it.