Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Little Dot Tube Amps: Vacuum Tube Rolling Guide
New Posts  All Forums:Forum Nav:

Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 266

post #3976 of 8784
Quote:
Originally Posted by mordy View Post
 

Can somebody explain what the purpose of this adapter is? Could it be used for any application re the Little Dot?

 

 

Instead of 1 12AU7 you can use 2 EC90. If one have adapter that can use one 12AU7 to drive both channels with little dot, then with that Ebay adapter you can use 2 EC90 tubes. :confused: I do not think you get better sound with that thing.

post #3977 of 8784

1000

I'm listening speechless. And i got the last one from electols... :dt880smile:

post #3978 of 8784
Quote:
Originally Posted by Artsi View Post
 

1000

I'm listening speechless. And i got the last one from electols... :dt880smile:

 

Beautiful! While it bears the Heintz and Kaufman brand, I looks to be a Tung-Sol, among the best of the best. :)

post #3979 of 8784
Quote:
Originally Posted by gibosi View Post
 

 

The Sylvania 5751 TMBP (Three Micas Black Plates) is a complete package. It lacks nothing. To my ears, it is equal, and perhaps better than my US-Amperex 6922, and it is certainly better than my Hamburg Valvo. If you can find one of these at a good price I encourage you to grab one. Compared to the other 12AX7s you have trialed, I think you will be very pleasantly surprised. But of course, I am hoping that the Heerlen E188CC and the others on their way to me will offer some formidable competition. :)

Whats the average price of those Sylvanias 5751 TMBP those are 12 volts you need only 1 of those wright.


Edited by MIKELAP - 11/14/13 at 6:00am
post #3980 of 8784
Quote:
Originally Posted by MIKELAP View Post
 

Whats the average price of those Sylvanias 5751 TMBP those are 12 volts you need only 1 of those wright.

 

Yes, this ia a premium version of the 12AX7, a dual triode, so you need only one tube. However, on eBay I am seeing mostly multiples of two and three. The only single I see is below. But untested and no returns, so perhaps a bit risky....

 

http://www.ebay.com/itm/301011472427?ssPageName=STRK:MEBIDX:IT&_trksid=p3984.m1426.l2649

 

The best price I am seeing on a pair is from Sweden, but $25.00 shipping to the US is a bit much...

 

http://www.ebay.com/itm/301015317776?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

 

This tube is rare, but every so often a good deal does pop-up, so the best strategy is patience. I got mine for $22 :)

post #3981 of 8784

A small package from the Czech Republic arrived today with a Tesla E88CC, manufactured in 1964, with gold pins and gold grids.

 

 

And another small package from Massachusetts arrived with a Tung-Sol JAN-CTL-6SU7GTY, apparently manufactured in 1947. As my amp is currently set up for 12AX7s, will pop this big guy in first. :)

 

 

Edit: 322 = Tung-Sol. Maybe 0-47 is 1950 week 47? 


Edited by gibosi - 11/14/13 at 9:49am
post #3982 of 8784
Quote:
Originally Posted by gibosi View Post
 

And another small package from Massachusetts arrived with a Tung-Sol JAN-CTL-6SU7GTY, apparently manufactured in 1947. As my amp is currently set up for 12AX7s, will pop this big guy in first. :)

 

 

I agree with Artsi.... This is a keeper! It's a tad bit warmer than the Sylvania 5751, with similar clarity, transparency and 3-D stage as compared to the very best 6DJ8/6922 and 12AX7/5751. You know.... it's getting harder and harder to figure out which tube I like best! lol But what a wonderful problem to have.... :)

post #3983 of 8784

I got two CEI stamped made in Holland 6SN7GT's as powertubes. I could be imaging things, but sound is little sharper through these. Structure is much like Russian 6N8S, but there is little differences.

700

I also got one very rare tube:

700

Ten has totally black glass. With led light i could see that there is 2 round tubes between micas.

 

And i have also another re-stamped tung-sol.

700


Edited by Artsi - 11/14/13 at 1:47pm
post #3984 of 8784
Quote:
Originally Posted by Artsi View Post
 

I got two CEI stamped made in Holland 6SN7GT's as powertubes. I could be imaging things, but sound is little sharper through these. Structure is much like Russian 6N8S, but there is little differences.

 

I also got one very rare tube:

Ten has totally black glass. With led light i could see that there is 2 round tubes between micas.

 

That CEI is still a 6N8S. The Ten looks nice. There was a discussion about Japanese brands here a while ago.

post #3985 of 8784
Quote:
Originally Posted by gibosi View Post
 

Edit: 322 = Tung-Sol. Maybe 0-47 is 1950 week 47? 

 

I think it is.

post #3986 of 8784

How shameful of all of you to be showing pictures of all those huge burly octal base tubes! All this tube pornography won't convince me to spend my hard-earned cash on octals lol. At least not quite yet; I have too much stuff left over to test on 6DJ8 and 6922 tubes to think about this yet.

 

Still, I can just feel my head getting gradually accustomed to the idea that I will eventually try those tubes... I swear hi-fi is a form of addiction lol...

 

I got my last two US 6922 in the mail this morning, so that'll give me two more chances to try NY-made Amperex tubes this weekend and give more impressions. I have about two or three different audio related DIY projects to complete this weekend, so actual detailed feedback may have to wait until Monday.

post #3987 of 8784
Yes by all means, everyone needs moar octals and B9A's!

Then some of you can sell me some of your nicer 7 pin tubes for cheap cheap! biggrin.gif
post #3988 of 8784
Quote:
Originally Posted by Artsi View Post
 

I got two CEI stamped made in Holland 6SN7GT's as powertubes. I could be imaging things, but sound is little sharper through these. Structure is much like Russian 6N8S, but there is little differences.

700

I also got one very rare tube:

700

Ten has totally black glass. With led light i could see that there is 2 round tubes between micas.

 

And i have also another re-stamped tung-sol.

700

I wonder how those tubes look with the lights off?:veryevil: 

post #3989 of 8784

Hi Artsi,

 

Some time back (p. 238, post #2569 - bottom of page) you provided us with a table of 6V and 12 Volt tubes from the 6DJ8 and 12AX7 families etc that would work with the Little Dot amps. Since I am completely unfamiliar with octal tubes I would appreciate it if you could provide a similar list of octal tube types that are compatible with the LD amps. Perhaps you could use two headings - one for driver tubes and one for power tubes. Also needed are the US, European and Russian tube designations.

 

This would make it much easier to shop for these tubes. A it is now I simply don't know what the designations are of equivalents of 6SL7 and 6SN7 tubes.

 

In addition, it would also be very useful if people could recommend certain makes and types for the best sound. (Obviously a work in progress, hoping to find the inexpensive oddball tube that is just as good as the famous ones.)

 

Another thing I noticed is that many of these tubes are very much in demand and sought after, and a Tung Sol 6SU7GTY tube could sell for $125 (although a search reveals that the same type tube sold for $10 as well).

 

With thanks in advance,

 

Mordy

post #3990 of 8784

Tung Sol 6SU7GTY is a wonderful tube but look out for the 6188 also. You can also find 6188 by Sylvania / PhilipsECG at much better prices.

 

6SL7GT: 6SL7GT, 5691, CV1985, 6113, 6188, ECC35, CV569 [VT 229]

 

6SN7GT: 6SN7GT, 6SN7GTB, 6SN7WGT, 6SN7WGTA, 6SN7WGTY, 5692, 6180, CV1988, CV3627, B65, ECC33, CV2821, ECC32, CV181, QA2408 [VT 231]

 

The are a few other close variants but the above should get some searching effectively.

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) › Little Dot Tube Amps: Vacuum Tube Rolling Guide