The Reference 6SN7 Thread

[Paladin79]

Well then. I might have to go to my private stash. Normal people aren't even allowed to look at it. Of course that would necessitate your next big thing to have a couple 300B's sprouting out of the top.

LOL sprouting eh? You must be planting a garden in your spare time when you are not petting your cat.
300b, 6080, practically the same thing only different. Since it is for you I will have to check to see if GE ever made 300B's. If I make you a set of mono blocks you get no input whatsoever, that is why I give things to you, it is much easier than giving you choices.

 

[bcowen]

LOL sprouting eh? You must be planting a garden in your spare time when you are not petting your cat.
300b, 6080, practically the same thing only different. Since it is for you I will have to check to see if GE ever made 300B's. If I make you a set of mono blocks you get no input whatsoever, that is why I give things to you, it is much easier than giving you choices.

If GE had ever made a 300B it would have been designated the 300BLAH.

No need for monoblocks. One 300B per channel in a stereo amp would do the trick. Single-ended of course, but you already knew that. Better yet, use 300BXLS's. 20 watts/channel. 'Phone impedance whether high, low, or close to a dead short would be irrelevant. And 6SN7's make great drivers for them, so you'd only have to buy two tubes. For you. I have some. LOL!

And just so there's no misunderstanding, that's not input. I was merely thinking out loud.

 

[Paladin79]

If GE had ever made a 300B it would have been designated the 300BLAH.

No need for monoblocks. One 300B per channel in a stereo amp would do the trick. Single-ended of course, but you already knew that. Better yet, use 300BXLS's. 20 watts/channel. 'Phone impedance whether high, low, or close to a dead short would be irrelevant. And 6SN7's make great drivers for them, so you'd only have to buy two tubes. For you. I have some. LOL!

And just so there's no misunderstanding, that's not input. I was merely thinking out loud.

It would be easier to just house train a feral cat, or maybe a badger. Maybe I could just get one of those from the wild, it would be less stressful than building you something lol.

 

[thomaskong78]

I believe I gifted you the 63 Melz, if you do sell it I should get a small portion of the proceeds. 85% seems about right.

I found Melz 1578 claimed to be made in 63 at Ebay.

They have five holes but not 1578 logo.

Are they really 1578?

 

[bcowen]

I found Melz 1578 claimed to be made in 63 at Ebay.



They have five holes but not 1578 logo.

Are they really 1578?

They look to be true 1578's with the metal mica supports up top. Can't see the shape of the bottom mica though which is also important.

I have some '64's coming. Some assembly required.

 

[Paladin79]

I found Melz 1578 claimed to be made in 63 at Ebay.



They have five holes but not 1578 logo.

Are they really 1578?

According to my Russian source, and I know and trust him fairly well. A lot of stamping goes on to convince people they are getting 1578's, mine come new in original packaging without the 1578 on them.That is why some of the lettering looks so fresh and new, it is. That tube has all the proper indicators, so it is correct.

The violet 1578 down below is definitely wrong.This is a seller I was warned about.

https://www.ebay.com/itm/1x-1578-6N...951454?hash=item261891959e:g:g0sAAOSwiOZcTAXD

Notice how sloppy the paint or ink looks. I buy 63's in bulk but I stay away from the others, I also prefer the sound of the 63's.

 

[thomaskong78]

The following is quoted from other person.

i will have two pairs of 1578 made in 80's and one made in 70"s

But i am also curious about one made in 60's or even 50's.

So far I like the sound out of one made in 80's.

"Every version of the military 68HC tube with metal base is a little different sounding. Even each year of 1578's are different too. Finding the holy grail is not easy and finding tubes that measure like new is not easy either. Best to stock up on them before they all disappear. I have several versions of 68HC and two or three versions of 1578. The best I think is the 1578 from the 70's. "

 

[thomaskong78]

One Russian dealer try to sell stock of 13 tubes made in 1968.

It also appears to have five holes and other typical shape of 1578, but no 1578 logo either.

After getting delivery of 1578 made in 70's on Wednesday I will decide whether to go for 13 stock tubes made in 68.

I welcome input from experienced users.

 

[Paladin79]

The following is quoted from other person.

i will have two pairs of 1578 made in 80's and one made in 70"s

But i am also curious about one made in 60's or even 50's.

So far I like the sound out of one made in 80's.

"Every version of the military 68HC tube with metal base is a little different sounding. Even each year of 1578's are different too. Finding the holy grail is not easy and finding tubes that measure like new is not easy either. Best to stock up on them before they all disappear. I have several versions of 68HC and two or three versions of 1578. The best I think is the 1578 from the 70's. "

Each persons taste is different I liked the 70’s and 80’s version till I heard the 63’s. Friends and I are doing a 52 tube challenge and the 63 is the only 1578 voted in for consideration but there is a caveat. We are using my amps and they tend to show flaws and major differences. You need not take my word for that. Ask around.

 

[Mr Trev]

It would be easier to just house train a feral cat, or maybe a badger. Maybe I could just get one of those from the wild, it would be less stressful than building you something lol.

Quick off-topic question about your amp…
Why not have an optional 12v heater (the biggest benefit of the G1217 Project Solstice)? 12sn7s are waaaay cheaper than the 6v ones

 

[attmci]

I found Melz 1578 claimed to be made in 63 at Ebay.



They have five holes but not 1578 logo.

Are they really 1578?

There are a lot of previous discussions. Google is your friend. Many ppl agree this is not a genuine 1578.

 

[Paladin79]

Quick off-topic question about your amp…
Why not have an optional 12v heater (the biggest benefit of the G1217 Project Solstice)? 12sn7s are waaaay cheaper than the 6v ones

The amp was designed for 6SN7 testing so I concentrated on that. It would be feasible to run a 12 volt filament with my current power transformer so I might consider it sometime. For now, I have promises to keep and the majority of my friends own 6SN7’s.

 

[Paladin79]

There are a lot of previous discussions. Google is your friend. Many ppl agree this is not a genuine 1578.

Lol and because someone stamps a number on it, it is lol. There are specific indicators you look for, that tube has them but believe what you want to believe.

 

[attmci]

Lol and because someone stamps a number on it, it is lol. There are specific indicators you look for, that tube has them but believe what you want to believe.

So true. It's very easy to produce some 1578.

I cannot tell the difference between a ECC33 and a ECC35 without use it.

 

[Ripper2860]

Lol and because someone stamps a number on it, it is lol. There are specific indicators you look for...

Well, that would have been nice to know a couple of weeks ago.