Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › 2359glenn | studio
New Posts  All Forums:Forum Nav:

2359glenn | studio - Page 353

post #5281 of 10138

C3g is not a "rollable" tube.  Every single one of them came from the same Siemens factory in Germany.  They show up with a few other German brand names, like Telefunken and Valvo but they are all the same tube from the same factory.  It was a specialized tube for the German telecom industry and was not in widespread use.  So all you need is a primary use pair and a single backup pair in case something bad happens.  These tubes are designed to give a minimum lifespan of 10,000 hours, and they are known to last for twice that long or longer in use.  A single pair of C3g will last for many years.  An impressive tube in many ways.

post #5282 of 10138
thanks, just found that out on google too. i guess i need to get few pairs before the price go up. anyone removed the metal shield?
post #5283 of 10138
Thread Starter 

Siemens's rep is what initially drew me to the Yamamoto A-09S 'cause it uses the C3m to complement the 300Bs.

post #5284 of 10138
Quote:
Originally Posted by jc9394 View Post

thanks, just found that out on google too. i guess i need to get few pairs before the price go up. anyone removed the metal shield?


I have.  There seems to be no ill effects from doing so.  It's a pretty tube by pentode standards but it doesn't put on much of a light show.  If anything happens to the ones unshielded I probably won't bother next time.

post #5285 of 10138
Quote:
Originally Posted by Silent One View Post
 

Siemens's rep is what initially drew me to the Yamamoto A-09S 'cause it uses the C3m to complement the 300Bs.

 

In many ways these were the culmination of tube knowledge and engineering.  The telecom office that handled atlantic ocean transmission gave tube engineers an absurdly demanding list of specifications for their dream tube to perform this function and the industry responded with the best it could produce.  It's no surprise it functions well as an audio signal tube given the low distortion and excellent electrical properties.

 

I think Yamamoto might really have the right idea for the tube too.  They can make 1.5 watts entirely on their own and have good gain, when you really think about it there wasn't really even a need for the 45 tube in my amp (which is only good for about the same amount of power)........ it could have been single gain stage design.  But, I think you need to run the C3g or C3m in pentode mode to do it like this.  Supposedly their distortion is even lower when used as a pentode, but Glenn says triode is the way to go for tubes and I trust his experience.

 

The 45's distortion is almost unmeasurable, so I suppose there is little lost and definitely something gained, even if mostly psychological, from having the amp based around one of the oldest direct heated triodes in existence.  I'm absolutely thrilled with the performance of my amp, it has been breaking in very nicely and sounds like it could take on any comers at this point.

post #5286 of 10138
Thread Starter 
Quote:
Originally Posted by Xcalibur255 View Post
 
 
Warning: Spoiler! (Click to show)

In many ways these were the culmination of tube knowledge and engineering.  The telecom office that handled atlantic ocean transmission gave tube engineers an absurdly demanding list of specifications for their dream tube to perform this function and the industry responded with the best it could produce.  It's no surprise it functions well as an audio signal tube given the low distortion and excellent electrical properties.

 

I think Yamamoto might really have the right idea for the tube too.  They can make 1.5 watts entirely on their own and have good gain, when you really think about it there wasn't really even a need for the 45 tube in my amp (which is only good for about the same amount of power)........ it could have been single gain stage design.  But, I think you need to run the C3g or C3m in pentode mode to do it like this.  Supposedly their distortion is even lower when used as a pentode, but Glenn says triode is the way to go for tubes and I trust his experience.

 

The 45's distortion is almost unmeasurable, so I suppose there is little lost and definitely something gained, even if mostly psychological, from having the amp based around one of the oldest direct heated triodes in existence.  I'm absolutely thrilled with the performance of my amp, it has been breaking in very nicely and sounds like it could take on any comers at this point.

 

 

Looking back, it would have been neat for Glenn to have worked on both at the same time to reduce costs and improve efficiency like the three of us considered at one time. But of course, yours first in tandem. :rolleyes: :D 

post #5287 of 10138

Would really appreciate if someone could tell me the signature of the amp(s).

Lushness, bas impact, soundstage, imagine, detail and with what kind if headphone they pair nicely with.

Any comparison to Crack, Decware, DNA Sonett, Leben etc would be very helpful.


Edited by Sweden - 10/13/13 at 6:07am
post #5288 of 10138
I am not a man with fancy words you will have to have one of the gugs that own one to say.
Also what amp the OTL or the 300B with output transformers.
post #5289 of 10138

Glenn is a doer, not a talker.

 

Sweden I know you have the HD800 in mind, I don't know if anybody has tried them with Glenn's amps.

 

The T1 pair nicely with Glenn's OTLs some owners will confirm this.

 

I am pairing my GR 6SN7/LP2/5998 OTL with my Maestro GMP400 and my GR Super 10 with my K701's and I am very pleased.

post #5290 of 10138
Quote:
Originally Posted by rosgr63 View Post
 

Glenn is a doer, not a talker.

 

Sweden I know you have the HD800 in mind, I don't know if anybody has tried them with Glenn's amps.

 

The T1 pair nicely with Glenn's OTLs some owners will confirm this.

 

I am pairing my GR 6SN7/LP2/5998 OTL with my Maestro GMP400 and my GR Super 10 with my K701's and I am very pleased.

 

 

Confirmed. I love the combo. I liked the Crack alright, but Glenn's amp is just better.

post #5291 of 10138

If you want a amp for the HD-800 it would be the OTL

I have the HD-650 and Hd-800 and there is no amp that sounds better with these head pones

then this OTL and the fact that it will take 6336 as well as the 6AS7 makes it able to drive many headphones.

post #5292 of 10138
Quote:
Originally Posted by wotts View Post
 

 

 

Confirmed. I love the combo. I liked the Crack alright, but Glenn's amp is just better.

In what way are they better?

post #5293 of 10138

Picture of the under side of George's amp

 

 

Top of amp

 

post #5294 of 10138
Quote:
Originally Posted by rosgr63 View Post
 

Glenn is a doer, not a talker.

 

Sweden I know you have the HD800 in mind, I don't know if anybody has tried them with Glenn's amps.

 

The T1 pair nicely with Glenn's OTLs some owners will confirm this.

 

I am pairing my GR 6SN7/LP2/5998 OTL with my Maestro GMP400 and my GR Super 10 with my K701's and I am very pleased.

 

Yes the HD800 is a very picky headphone that IMO need some tube lushness to give them a soul.

post #5295 of 10138
Quote:
Originally Posted by 2359glenn View Post
 

If you want a amp for the HD-800 it would be the OTL

I have the HD-650 and Hd-800 and there is no amp that sounds better with these head pones

then this OTL and the fact that it will take 6336 as well as the 6AS7 makes it able to drive many headphones.

 

Glenn, do you think the 6336s work better with certain headphones and the 6AS7s with other?

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › 2359glenn | studio