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6SN7 Tube Addicts - Page 6

post #76 of 4251
I see the REAL 1578's are not for sale anymore...only copy's or so called close tubes...The 1578 is only real if it has the 1578 designation stamped on it, so don't fall for this trap!
post #77 of 4251
Thread Starter 
Quote:
Originally Posted by tourmaline View Post
I see the REAL 1578's are not for sale anymore...only copy's or so called close tubes...The 1578 is only real if it has the 1578 designation stamped on it, so don't fall for this trap!
There are some 1578's without the holes in the plates but with the 1578 marked on the glass.
And there are some 6N8S's from the Melz factory (70's Tubes) with the holes in the side of the plates.
Are they better or worst than the 1578's which don't have the holes?
post #78 of 4251
Quote:
Originally Posted by rosgr63 View Post
There are some 1578's without the holes in the plates but with the 1578 marked on the glass.
And there are some 6N8S's from the Melz factory (70's Tubes) with the holes in the side of the plates.
Are they better or worst than the 1578's which don't have the holes?
I can put a picture of mine on here...so you can see for yourself, i don't have the toprated tubes though, i had one but gave it away because i use other top end 6sn7's in my setup...as i wrote before, there are reports of at least 3 variations of the 1578 tube...the best sounding is the one with the round hole...

Either way, the real 1578, wich have blue stamps...all sound good and much better then the pack of the 6sn7's. just not as good as the w's imho.
post #79 of 4251
Thread Starter 
Quote:
Originally Posted by tourmaline View Post
I can put a picture of mine on here...so you can see for yourself, i don't have the toprated tubes though, i had one but gave it away because i use other top end 6sn7's in my setup...as i wrote before, there are reports of at least 3 variations of the 1578 tube...the best sounding is the one with the round hole...

Either way, the real 1578, wich have blue stamps...all sound good and much better then the pack of the 6sn7's. just not as good as the w's imho.
Please post a pic when you have time for reference.Thanks
post #80 of 4251
Thread Starter 
tourmaline any luck with the photos?
post #81 of 4251
I have a pair of 6SN7Gt's National Union. I really like their sound but they have a 60hz hum with my amp. None of my other 6SN7s do this (RCA V231s, various Sylvanias, Baldwin, etc.) IOW's All my other 6SN7's are silent without this hum.

Is this a characteristic of NU 6SN7GT's or do a have a bad pair?
post #82 of 4251
I have a pair of NU tubes - black glass - quiet as a mouse.
post #83 of 4251
Thread Starter 
skylab how would you grade your NU Black Glass tubes?
post #84 of 4251
Excellent tubes. A little on the bassy side, generally warm and inviting, good detail, but not the camps in that regard. Nice tubes though - competitive to the mid-upper tier of 6SN7's, but short of the very best.
post #85 of 4251
Thread Starter 
Skylab which are your top 5's?
post #86 of 4251
Quote:
Originally Posted by Skylab View Post
Excellent tubes. A little on the bassy side, generally warm and inviting, good detail, but not the camps in that regard. Nice tubes though - competitive to the mid-upper tier of 6SN7's, but short of the very best.
Yes that it was I hear too, it is an excellent match for my hybrid amp which can have a little too SS tightish bass. Just wanted to know if I had a problem pair with mine and the hum, sounds like I need to find another pair.

Thanks for the input.
post #87 of 4251
Count me as not a fan of 6sn7/vt-231. While I loved the Wheatfield HA-2 (a two year relationship), and liked the EC HD300 (whirlwind romance), something was still lacking that even the most exotic variant could not sate.

So, I'll never have (nor build) another 6sn7 based amp - not even a Stacker II.

May also say the same for el34/6ca7, but at least that door is not quite closed. The 6sn7 door is closed, locked, nailed, bricked over and painted... just a fading memory.

On to 6h30DR, 6n23p, and 6s4a... well, and I did just buy a 304tl (VT129) with a socket.
post #88 of 4251
Quote:
Originally Posted by rosgr63 View Post
Skylab which are your top 5's?
Probably something like this:

1. Mullard ECC32/CV181 (which really isn't a 6SN7, but where it will work is terrific)
2. Brimar CV1988/6SN7GTY
3. Mullard ECC33
4. Tung-Sol black-glass round-plate 6SN7GT
5. Sylvania 6SN7W metal base
post #89 of 4251
Thread Starter 
Thanks Skylab.
What about the Osram B65 and Brimar 6SN7GT?
post #90 of 4251
My search for a pair of NU's came up empty but I found of NOS Mouse Ear Tong-Sols for cheap, going to give them a shot.
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