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post #646 of 10823

With the 6AS7G it might not be a problem to use the 6SL7.

With higher gain power tubes the 6SL7 won't work well.

post #647 of 10823
Thread Starter 

In-session with Ronnie Laws...

 

 

Last night, I took the rig outta the driveway and down the street. Riding with me is the 5U8C, 5998's & Fivre Brown Base 6SN7GT. The 5U8C and the Fivre isn't really a good pairing. I had to stop a few times on this drive. 

 

wink_face.gif But, not because I was going to put one or both of them out on the street. It's because I thought I heard something. And I did. Despite this pairing suffering in this way and that, I noticed its ability to do something the other 6SN7's I evaluated overnight haven't done very well with the 5U8C, with the exception of the TS-BGRP.

 

Although, the 6SN7's tested did better with the '596,' my focus is on the 5U8C and potential synergy with the Fivre. And despite a poor showing, there's something about it that makes it worth listening to. And if I can put a finger on the quality in question, it could help in finding the right tube for the Russian.

 

I hope to put more words to this within the next 16 hours.


Edited by Silent One - 8/5/12 at 5:28am
post #648 of 10823

Have you discovered the SO's boson of music?

 

Can't wait!

Down to more earthly stuff, I am evaluating some Bendix 6080WB's with a FIVRE 6SL7 driver.

 

Music: Empresarios - Sabor Tropical

post #649 of 10823

I really like the 5U8C. I has less bass punch than the 596 and more space in the mids and upper ranges. By comparison, the 596 is bigger sounding--wall of sound-like, all around.

 

I've been primarily listening to acoustic guitar and chamber music. With an occasional Pete York Yorn with Scarlett Johansson.

 

5U8C = light showers and gentle rain

596 = steady rain with light gusts of wind

 

EDIT: Name correction. Sorry Pete.


Edited by Clayton SF - 8/5/12 at 3:35pm
post #650 of 10823

I'm having a bad day I made a 12SN7 adapter and when i went to test it I broke two 12SN7 tubes,

one 12SN7 mouse ears and one GE bummer.

post #651 of 10823

^No. I am so sorry to hear that. Take a breather! Work on the adapter later. No more killing of the Mouse Ears! :(

post #652 of 10823

Glenn,

 

Sorry to hear that!

post #653 of 10823

Not the mouse ears Glenn!

 

They are one of my all time favourite tubes, the 6SN7 type pair very well with the Bendix 6080.

post #654 of 10823

700

post #655 of 10823

Nice Clayton! I chuckled at that.

post #656 of 10823
Thread Starter 

The news of the Mouse Ears sudden death is a double whammy for me! My love of vacuum tubes. And during college, had a summer gig at Disneyland...The House of Mickey Mouse.

ph34r.gif

post #657 of 10823
Thread Starter 
Quote:
Originally Posted by Clayton SF View Post

I really like the 5U8C. I has less bass punch than the 596 and more space in the mids and upper ranges. By comparison, the 596 is bigger sounding--wall of sound-like, all around.

 

I've been primarily listening to acoustic guitar and chamber music. With an occasional Pete York with Scarlett Johansson.

 

5U8C = light showers and gentle rain

596 = steady rain with light gusts of wind

 

Clayton, you nailed it...:thumb: Olympic style!

post #658 of 10823
Thread Starter 
Quote:
Originally Posted by 2359glenn View Post

I'm having a bad day I made a 12SN7 adapter and when i went to test it I broke two 12SN7 tubes,

one 12SN7 mouse ears and one GE bummer.

 

Hopefully you'll have a brighter tomorrow...

post #659 of 10823

As promised, a write up of sorts on the 6AH7GT:

 

700

 

Probably the most noticeable thing you'll see here is this tube has round plates, much like a certain beloved and expensive 6SN7GT.  I've struggled to really put into words what I was hearing while I tested this tube, much more so than I usually do, so you'll have to forgive me if this sounds jumbled.  I'm basically working off notes I scribbled on a napkin (totally serious about this!).....  rolleyes.gif

 

My initial impression of the tube was rather good, while it was breaking in.  It has a certain quality to the midrange that was seductive, it drew emotion out of the vocals of some tracks.  This only lasted until the tube settled in unfortunately, a brief hours long window of pleasantness.  Afterwards my impression of the tube grew more negative, I couldn't really nail down why but had to force myself to listen to it more and more.

 

It was the direct back-to-back comparison with the round plate Tung Sol 6SN7 that really helped me put perspective on the sound of the 6AH7.  This is probably the most important thing a person can do when evaluating something like this, without the different perspective it is hard to really see the whole picture.  Even with the Tung Sol injecting noise into the left channel as this one so loves to do it was not pretty for the 6AH7.  The Tung Sol isn't just the better sounding tube, it is by a very wide margin.

 

As mentiond by Glenn earlier, the 6AH7 suffers from a sense of thinness to the sound.  This seems to come from two places:  first is the lack of bass response.  The tube is rather light in the bass, and has no sense of impact down low.  The second source is the greater problem IMO:  the tube seems to lack a sense of weight and body to notes in general.  Not just the bass, the whole range.  It isn't as obvious until its compared to a good 6SN7.  A softer sense of dynamics also contributed to the rather tepid sound the tube had to offer.  The biggest weakness, though, was the imaging.  Much like with the 6BL7 this is what eliminates the tube from considering as a replacement for the 6SN7 all together IMO.  The stereo image just sounds...... wrong somehow.  I don't know how to put it into words.  Objectively I can say that the soundstage has decent width and great depth (much like the tung sol, hence the theory about the round plates), but it has poor height.  But there is more to it than that, things just don't sound correct somehow.  The sound is big, and yet small and nothing feels placed right.  There may be a phase issue going on, but it goes beyond my technical understanding.  Rounding out the list of negatives was a sense of congestion in the soundstage that hurt note separation and the sense of correct instrument placement.

 

On the fairly good side of the notes, I felt the tube had an extended sense of reverb and note decay that worked well with some types of music.  It also hangs in there well when pushed loud.  It doesn't get screechy or harsh, the treble is pretty mild and stays in check.  I cranked a Chili Peppers song to near deafening volumes and was surprised at how well sorted things stayed overall.  It didn't turn into a mess like it can with some mediocre 6SN7 tubes.  The overall tone and midrange is also pleasant, thin sounding but it commits no tonal offenses such as sounding nasal or bright.  If the bass weren't so light it would sound very balanced.

 

So is it worth considering as a 6SN7 alternative?  In my opinion no.  But they are cheap so there is no harm in trying aside from the need for the adapter of course.

 

I have one other tube to talk about, the 6E6, but I have yet to listen to it (it's warming up for the first time right now) so I'll have one more report for you all.  I wanted to make a dramatic reveal of them since I never get to showcase new tubes, but Glenn let the cat out of the bag early.  tongue_smile.gif

 

What this did, most of all, was remind me how much I love the sound of the round plate tung sol.  The only time I truly feel the music and connect seems to be when this tube is in the amp, despite all the problems I have had with both of them.  It's the only tube that brings immersion to my listening sessions, the other just can't do it.  If this sound can be improved upon then I'll be excited beyond words for the good things to come here at Glenn Studios

post #660 of 10823
Quote:
Originally Posted by 2359glenn View Post

I'm having a bad day I made a 12SN7 adapter and when i went to test it I broke two 12SN7 tubes,

one 12SN7 mouse ears and one GE bummer.


Looks like monday came early.  Kick back and relax for a while I say.  I've always found things to come much easier when I'm frustrated if I set it down for a while and pick it back up again later.

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