The Reference 6SN7 Thread
Nov 18, 2022 at 6:33 PM Post #8,044 of 10,015
100% is pretty good. Who could ask for more? Do you like them? :thinking:
:smile:
Yes, I get to roll them in a rotation with many other tubes. Just different presentation...I like them all. Tubes I dont like sit deep down in the wooden box...lol

PSX_20221012_230842.jpg


Actually, have 7 pairs and selling 3 pairs NIB military box. Sold one pair a couple of weeks ago to a nice fellow here, 2 pairs left.
Update: My apology, gentlemen, the last 2 pairs have gone to another fellow here. Thank you for your kind consideration.

PSX_20220822_201335.jpg
 
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Nov 20, 2022 at 4:45 PM Post #8,046 of 10,015
I wish the thread would be retitled as the twin triode thread. We talk about so many different ones beyond 6sn7. There is also another 6sn7 thread (6sn7 fanatics?) that doesn’t get posted to as often but I think they stick to 6sn7.
 
Nov 23, 2022 at 6:16 AM Post #8,047 of 10,015
Listing these mint condition Mullard ECC33 up for sales. Please pm if interested before I list them at the classified section.
4 pieces 100% matched with same old code and date, 1324 E4 - MAY 1954 ----- super rare!!!
Blackburn, slim brown base, rectangle getter.
All tested above 100% emission.

UPDATE: These have been sold, thank you!!!
 

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Nov 23, 2022 at 9:08 AM Post #8,048 of 10,015
Listing these mint condition Mullard ECC33 up for sales. Please pm if interested before I list them at the classified section.
4 pieces 100% matched with same old code and date, 1324 E4 - MAY 1954 ----- super rare!!!
Blackburn, slim brown base, rectangle getter.
All tested above 100% emission.

20220722_055708_HDR.jpg
PSX_20220722_061051.jpg
20221123_193104.jpg
Tested at Va=180, Vg=-2.0
Those are some gorgeous tubes!!!
 
Nov 28, 2022 at 8:38 PM Post #8,050 of 10,015
Any input on this/these questions would be appreciated.

Lets assume you have an amp that is 1x 6SN7 -> 1x 6AS7. Both heater currents added together on typical tubes would be 3.1 amps (0.6a for 6SN7 and 2.5a for 6AS7). Lets say one wanted to use tubes that were rated for pulling more amps. For the sake of argument, let's say the additional load was going to be about another 0.9 amps, so about 4 amps total instead of the 3.1 amps.

If you're unable to get official documentation on what the transformer can handle, what does one need to be monitoring while they are running the tubes pulling the additional load in order to come to a conclusion if its safe? Would we just need to be monitoring the temperature within the amp, or is there something/anything else one should/could be monitoring?
 
Nov 28, 2022 at 11:11 PM Post #8,051 of 10,015
Any input on this/these questions would be appreciated.

Lets assume you have an amp that is 1x 6SN7 -> 1x 6AS7. Both heater currents added together on typical tubes would be 3.1 amps (0.6a for 6SN7 and 2.5a for 6AS7). Lets say one wanted to use tubes that were rated for pulling more amps. For the sake of argument, let's say the additional load was going to be about another 0.9 amps, so about 4 amps total instead of the 3.1 amps.

If you're unable to get official documentation on what the transformer can handle, what does one need to be monitoring while they are running the tubes pulling the additional load in order to come to a conclusion if its safe? Would we just need to be monitoring the temperature within the amp, or is there something/anything else one should/could be monitoring?
Might notice the pungent aroma of transformer windings as they melt into the big smoke of thermionic destiny.

Before that check the temp of the transformer by hand - but only if it's not glowing. :ksc75smile:

What amp is it and what set of tubes? Pair of 6BX7s and a 6N7?
 
Nov 28, 2022 at 11:34 PM Post #8,052 of 10,015
Might notice the pungent aroma of transformer windings as they melt into the big smoke of thermionic destiny.

Before that check the temp of the transformer by hand - but only if it's not glowing. :ksc75smile:

What amp is it and what set of tubes? Pair of 6BX7s and a 6N7?
Eufonika H5 .. wanted to try a single 6BL7 (and 6BX7) as the input with 6AS7 as output for more than 1 minute because of paranoia lol.. from what I did hear, it sounds quite good. Just don't want to turn the amp into paperweight.
 
Nov 29, 2022 at 12:46 AM Post #8,053 of 10,015
It'll be fine. Mine is. And I've done worse. Wieslaw gives us a little bit of headroom - just enough to allow for 'experiments'.

But, one thing to remember... never use a single 6BX7 as input with a single 6BX7 output. It's like never crossing the streams in GB or thermionic incest. :k701smile:

That and it doesn't sound as good as 6SN7/pair of 6J5s driving a single 6BX7 output.. Enjoy the 6BX7 as output. One of the best, imo.

Do you have the basic H5 or Miflex?
 
Nov 29, 2022 at 12:54 AM Post #8,054 of 10,015
It'll be fine. Mine is. And I've done worse. Wieslaw gives us a little bit of headroom - just enough to allow for 'experiments'.

But, one thing to remember... never use a single 6BX7 as input with a single 6BX7 output. It's like never crossing the streams in GB or thermionic incest. :k701smile:

That and it doesn't sound as good as 6SN7/pair of 6J5s driving a single 6BX7 output.. Enjoy the 6BX7 as output. One of the best, imo.

Do you have the basic H5 or Miflex?
Have the Miflex version. I do enjoy it! Once I get some of the 6BX7 tubes in ill certainly give that a try. Right now only have 6BL7s on hand, but have a few 6BX7 tubes on the way.
 
Nov 29, 2022 at 9:32 AM Post #8,055 of 10,015
Listing these mint condition Mullard ECC33 up for sales. Please pm if interested before I list them at the classified section.
4 pieces 100% matched with same old code and date, 1324 E4 - MAY 1954 ----- super rare!!!
Blackburn, slim brown base, rectangle getter.
All tested above 100% emission.

UPDATE: These have been sold, thank you!!!

Nice!
 

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