2359glenn | studio
Jan 17, 2020 at 6:11 AM Post #35,132 of 39,986
How do they sound??

The flat plate 6BL7GT tubes are still burning in, but early impressions are they have good bass and fullness of sound. Vocals are clear and highs dont sound overemphasised or rolled off with the Sylvania 6J5 pair or single 6SN7W.

Despite the relatively higher gain of the 6BL7, my set of 6 tubes are quiet, no hum or noise from the tubes, also not microphonic. Happy :)

* Edit: all flat plates in now, Verite loves this roll!

IMG_20200117_222239.jpg
 
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Jan 17, 2020 at 9:50 AM Post #35,133 of 39,986
I think if you get a very large isolation transformer it may hum itself. ALL TRANSFORMERS HUM TI SOME EXTENT.
The amp has a 250Va transformer in it so I would get at least 500Va.

Glenn - Thanks! Will probably go for 1kVa then, to allow some head-room for the new amp you're working on too... Will avoid the 2.5kVa (and bigger) monstrosities :wink:
 
Jan 17, 2020 at 1:56 PM Post #35,134 of 39,986
Balanced power is still 120v. It just runs 60 in each direction without a neutral. The difference between 60 and -60 (so to speak) is 120.
 
Jan 17, 2020 at 5:29 PM Post #35,136 of 39,986
Ahh!
 
Jan 18, 2020 at 9:47 AM Post #35,137 of 39,986
Good Saturday to all.

Just rolled in the Mullard EL37 along with the 53KU rectifier and I am listening to a huge Eric Gayles playlist that I made.

Life is good!

DSC03577.JPG


 
Jan 18, 2020 at 9:55 AM Post #35,138 of 39,986
Just rolled in the Mullard EL37
Joe - the EL37 is the predecessor for EL34, from what I saw online... How does it sound compared to EL34?
 
Jan 18, 2020 at 10:34 AM Post #35,139 of 39,986
The EL37 was Mullards answer to the GEC KT66.
The Mullard EL37 can provide gobs of power, maybe 70 watts in a push/pull amp.

Running these in the GEL3N amp at 250 volts they sound fantastic...as Glenn has said, I would think they will last a long life and you also have the advantage of less distortion
If you are just using for headphones, this can be a huge plus...of course if you want to power speakers also then you may need more voltage on the plates and a different transformer.

As far as sound. A rich sound, nice and balanced, not as detailed or spacious as KT66...but does everything very well from top to bottom.
Fantastic mids. I am using 53KU rectifier and some Holland EL3N.
Rich warm sound.

As far as comparing the sound with EL34...I use different rectifiers for both tubes so I would have to sit down and do some A/B with the same tubes.

I have just been enjoying listening to my music, and not worrying about much else :)

I have enough power tubes and rectifiers that would take quite some time to listen and compare all.

I have started exercising a bit since we bought a treadmill, so I doubt I will be doing any serious A/B tubes

The combo that I seem to listen to the most seems to be Mullard EL34 xf2 / Mullard GZ32 / any EL3N

Look forward to win I can hear these tubes with L63 and ECC31/32/33/35 drivers
 
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Jan 18, 2020 at 10:43 AM Post #35,140 of 39,986
- intermission -

finally assembled a set of 6 Sylvania 6BL7GT flat plate 3 mica tubes



:)

Inspired by this 'intermission' post, I put some Sylvania 6J5s back in. It has been a few weeks. In combo with the mixed pairs of 6080s, it is sounding pretty beautiful today.

EDIT: forgot the pics!
20200118_153658.jpg 20200118_153639.jpg

Listening presently to a very spacious song:
 
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Jan 18, 2020 at 12:34 PM Post #35,142 of 39,986
Looks like UT has moved on and we will have a new lucky listener. Great day and a great deal for someone.

Congrats to the new owner. Fun times ahead for sure.

Got a killer deal too!
 
Jan 18, 2020 at 12:38 PM Post #35,143 of 39,986
Congrats to the new owner. Fun times ahead for sure.

Got a killer deal too!
It was almost worth buying just for the tubes! Let alone the amp. Best way to kick the addition... sell the amp. I'm almost 3 weeks into my new years resolution of not buying any more tubes... but it's tough lol.
 
Jan 18, 2020 at 12:43 PM Post #35,144 of 39,986
It was almost worth buying just for the tubes! Let alone the amp. Best way to kick the addition... sell the amp. I'm almost 3 weeks into my new years resolution of not buying any more tubes... but it's tough lol.

I know the feeling....especially if you are a tube collector and not someone who just wants enough tubes to change the sound up a bit.

I have fought off the temptation for a while and am saving for new cans...usually tubes get in the way of my savings, trying to be strong :ksc75smile:
 
Jan 18, 2020 at 12:54 PM Post #35,145 of 39,986
Damn, I should checked this morning. Oh well! Glad someone got it
 

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