[ilikepooters]

Which brimar model are you talking about, the black glass one or?

They're all much of a muchness really, i have clear glass with orange print and black glass with brown base and can't really choose much between them. Haven't tried the black glass with black base though.

 

[Wes S]

I just scored 2 NOS, with one being NIB, black glass/ black base Brimar 6SN7GT. They look to have the exact same construction, as the brown base/ black glass Brimar, so lets see if they sound the same. I will report back, after burn in. I love this forum, and all the helpful members. I found me a great member, with a stash of all the great 6SN7's and he has been kind enough to sell me a few, from his private collection. Thanks Stavros!

 

[tafens]

Is the year of manufacture important? I thought the real ones should be from 1950's, but the instruction says nothing about year.

Ok, trying to identify some suspect tubes on eBay:

https://www.ebay.com/itm/1x-1578-6N...951454?hash=item261891959e:g:g0sAAOSwiOZcTAXD
In this one, even though both tubes are stamped with 1578, the tube on the left is fake, because it has the oval mica and the brackets are of the wrong kind. The tube on the right however, is real 1578, even though year is 86 according to seller/date stamp?

https://www.ebay.com/itm/6N8S-MELZ-...029187&hash=item2ac84075ee:g:chwAAOSwXIRcmVEw
Real, but from 1970's?

https://www.ebay.com/itm/2PCS-6N8S-...204642&hash=item1ef7c1c2ca:g:hRUAAOSwH2Vb8Iog
Are the round holes in the plate important? If not the left one is real (ledges on mica, steel brackets), but the right one is not (oval mica, wrong brackets)?

 

[bcowen]

.

 

[ilikepooters]

Mine is November '69, not heard any other years, but that '70's one for $48 is a steal, really worth a punt at that price. Payed $120 for mine.

 

[malenak]

So, I just got the JJ Electronic 6SL7. I am courious, I ordered 6SN7, but I got 6SL7. Is there any difference? I tried it, it fits into Lyr3 without any problem. And, it plays nice right from the beginning. It is better than stock. Did anyone tried JJ Electronic 6SL7? What are your thoughts?
I am courious if the sound will change with burning-in.

 

[Wes S]

So, I just got the JJ Electronic 6SL7. I am courious, I ordered 6SN7, but I got 6SL7. Is there any difference? I tried it, it fits into Lyr3 without any problem. And, it plays nice right from the beginning. It is better than stock. Did anyone tried JJ Electronic 6SL7? What are your thoughts?
I am courious if the sound will change with burning-in.

Running tubes, that were not designed for the amp, seems to be a major trend these days? Seems kind of strange to me, and I won't be doing it, unless I get an ok from the designer of the amp. Seeing as they know, way more than me, about what is going on under the hood, I am gonna stick with the tube made for the amp. Guess I am leaving this thread too, so I am not tempted to ruin my amps.

 

[tafens]

So, I just got the JJ Electronic 6SL7. I am courious, I ordered 6SN7, but I got 6SL7. Is there any difference?

A quick search for some specs reveals that the heater filament current is 0.3 amps at 6.3 volts for 6SL7. 6SN7 is 0.6 amps at 6.3 volts so it’s ok that way, but it could have other electrical differences which the Lyr3 may not be designed to handle.

Heater current is really important by the way, as too much heater current can overheat and/or blow the transformers and generally make for a bad day.

Anyway, I’d recommend mailing Schiit and ask if the Lyr3 can handle the 6SL7 before continuing to use it.

 

[tafens]

Mine is November '69, not heard any other years, but that '70's one for $48 is a steal, really worth a punt at that price. Payed $120 for mine.

Seems someone snagged it now.
Oh, wait. That was me

That was two more tubes in as many days..
Gosh, this really is a slippery slope..

 

[bcowen]

.

 

[domes]

I am new to the Lyr3 and new to tubes but finally managed to jump into the boat!! I happened to snag a nos Westinghouse 6SN7GTB with top D getter and black plates from tctubes.com that came in a box with Westinghouse Reliatron printed on one side. I hope this is the one others have mentioned is quite good. So far, the tube is not wowing me and reminds me a bit of solid state. The amp came with a used Raytheon, which sounds much more alive, dynamic, spacious with better bass than the Westinghouse. Problem is, it is so microphonic I can't even type on my keyboard without hearing the tube noise and I had to move it further away from my monitors to make it almost bearable. Maybe and hopefully the Westinghouse will really improve with burn in? I only have about 8 hours on it so far. It however is dead silent and the Lyr3 is considerably cooler than with the Raytheon in it.

 

[ProfFalkin]

50 hours, then reevaluate.

 

[bcowen]

.

 

[domes]

Maybe I don’t have a Raytheon but a GE. These are 2 photos of the “Raytheon” It still sounds good just crazy microphonic. I thought at first maybe something wrong with the lyr until I put in the Schiit stock tube.

 

[domes]

And the Westinghouse GTB.