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Little Dot MK VI / Little Dot MK VIII SE Owners Unite - Page 74

post #1096 of 1346

First pic is Shuguang Treasure + Rca 6as7g black plate.

 

Second pic seems to be stock tube to me :o

post #1097 of 1346

In photo 1:

Power Tubes:

Svetlana 6N5S {Military version of 6N13S) made in 1968, bought recently N.O.S. for $15 each. I like these tubes, they sound clean and clear with good instrument separation and big sound-stage.

 

http://tubes-store.com/product_info.php?cPath=30_78&products_id=107

 

Driver Tubes:

Shuguang 50 Years Treasure, with socket saver under tube as the ceramic base of the tube is wider than the Aluminium rings on the Amplifier will allow.

 

http://psvanetube.com/wordpress/store/products/cv181-z-pair/

 

Stock tubes in second photo, the first day I had the amplifier.

post #1098 of 1346

I got the Jensen Transformers DM2-2RX today, but I am still waiting for the phono-stage. But I did connect up my CD player (Denon DCD 700 AE) to the Little Dot MK VI+ through the Jensen DM2-2RX. I am surprised at the Jensen Transformer, it works so well at converting a single ended signal to a balanced signal. 

 

I have been listening to WMA Lossless music that I ripped from CD, played with Foobar2000, through a Musical Fidelity V-Link 192 then a Little Dot DAC I, then the Little Dot MK VI+..... and the sound was good....... but today I ran the Denon CD player through the Jensen Transformer and then into the balanced input of the Little Dot MK VI+. The sound was at a slightly lower volume, but the quality seemed better, a bit clearer and crisper. The sound-stage seemed better. I am very surprised with this result. I was not expecting a transformer to make the quality of the sound better. 

 

Until last week I was not aware that a transformer could convert a single ended signal to a balanced signal, and I am happily surprised at how good the quality of the sound is after running it through the Jensen Transformer DM2-2RX. It cost $200, but it is worth the money for what it does.

post #1099 of 1346

Yes a transformer secondary can certainly technically be balanced and provide over 90db of ground loop isolation as well. Jensen is about as good as a brand for signal level conversion for the pro audio market.

 

Jensen also make a SUB-2RR specially made for driving powered subwoofers at very low frequencies while getting rid of any AC hum.  It is hard for transformer to operate at low frequencies and still be linear. That model is low rated frequency response: is -1dB at 0.4Hz, -3dB at 0.15Hz


Edited by john57 - 1/27/14 at 11:15pm
post #1100 of 1346
Those Svetlana power tubes you got, do they fit directly without any sockets or modding?
post #1101 of 1346

The Svetlana is my favorite Russian brand and they will just fit any Little Dot products without mods.

post #1102 of 1346
Quote:
Originally Posted by Androb View Post

Those Svetlana power tubes you got, do they fit directly without any sockets or modding?

They fit straight in, no mods no extras. They run cooler than the 6080 tubes. If you want to upgrade from stock power tubes and can't afford the Western Electric and other high end tubes, try the Svetlana tubes, they are very good. I have never tried the Western Electric tubes so I can't compare them, but I know the Svetlana tubes are great...... try the 6N5S military issue tubes, made in 1968, I got 4 all made in the same batch, same date code, perfect condition,new but made almost 50 years ago, read high on the mV gauge on the amp. They were made in St Petersburg and are shipped out from Moscow. The link to the Tubes Store is the shop I have bought from a number of times.... trustworthy, honest, pay with PayPal, and all the tubes I bought from them are very good.


Edited by ozaudios - 1/27/14 at 11:51pm
post #1103 of 1346
I might actually try them smily_headphones1.gif A good price!
post #1104 of 1346

Will the Svetlana power tubes work well with the original driver tubes?
Thinking of ordering them but keep the original driver tubes since it's alot of money to spend. :)

post #1105 of 1346
Quote:
Originally Posted by john57 View Post
 

The Svetlana is my favorite Russian brand and they will just fit any Little Dot products without mods.

 

Is this the 6H13C's you're talking about? Tall shaped coke bottle 6080/6AS7G equivalents?

post #1106 of 1346

I swapped my original driver tubes very soon after getting the amp, so I can't say if they have good synergy with the Svetlana 6N5S.

 

I have bought many sets of power tubes since getting the amplifier, and I like the 6N5S so much that I will buy another set of 4, maybe even 2 sets of 4. They are GOOD clean sounding tubes, and great value at $15 each for 46 year old tubes that are not made any more, special military edition (usually last longer) that come as effectively a matched set..... same date and production run, N.O.S.

 

I do not know where to get such good tubes in a set, vintage military edition, N.O.S. never used for such a good price. And delivery cost me $12 for delivery to Australia from Moscow!

 

You will be happy with these tubes if you buy them.


Edited by ozaudios - 1/28/14 at 4:16am
post #1107 of 1346

The label says '6H5C' which is Russian for '6N5S'

This tube is plugged into a socket, they are standard OCTAL BASE tubes.

post #1108 of 1346

The 6N5S have a good glow, put out a lot of light, and they look so good.

post #1109 of 1346
Looks beautiful indeed smily_headphones1.gif I actually ordered them because of the low cost. Would like some other driver tubes aswell but don't know what to get.
post #1110 of 1346

Just received a quad of RCA 6AS7G black plates, there is one with a short :-(

My try will be delayed...

 

To relieve my sadness, I've just (finally in fact) pulled the trigger on 4 capacitor. I've bought 0.33µF "only", don't want extra trouble with huge monsters in the little chassis.

Like you guys, I'm thinking of modding the bottom plates, unless I'll have trouble with the fans.

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