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Little Dot MKIII Tube Rolling - Page 185

post #2761 of 2901
Quote:
Originally Posted by ChadHahn View Post

I recently bought a Little Dot MKIII.  After some reading of this thread I think I have a version 1.  It has switches for tube types instead of jumpers.  What are my options for power tubes?

 

Thanks,

 

Chad


Usually, you have switches for the gain and jumpers for the adjustment to EF95/EF92/EF91 family driver tubes. The version number is written on the board, check the holes in the bottom.

 

If you have version 1, your power tube options are 6N6P, 6N6P-I and 6N6P-IR.

post #2762 of 2901

 

Quote:
Originally Posted by ChadHahn View Post

I recently bought a Little Dot MKIII.  After some reading of this thread I think I have a version 1.  It has switches for tube types instead of jumpers.  What are my options for power tubes?

 

Thanks,

 

Chad

Just look under your mk3 in one of the peep holes upper right if you look soundways you should see it stamped on the edge of the board 1.0 or 2.0


Edited by MIKELAP - 2/15/13 at 5:54pm
post #2763 of 2901

Hi - I have a tube question if anyone's up for it. About a year ago I bought from ebay what were advertised as "Match Codes PAIR JAN JHS Sylvania 6AK5W Tube NOS D Getter". 

 

When they turned up, they looked like this: 

 

 

 

Very obviously GE branded, although labelled JHS on the boxes.I thought there had been some mix up, but couldn't be bothered to question it with the seller. I thought no more about it, until recently I tried them out again, and they have fast become my favourite tube when using my dt880s. The have the nice accurate soundstage I like with EF95 tubes, but they also have great bass and add just the right amount of warmth to the dt880. 

 

I'd like to buy some more, since I like them so much - but I'm confused - can anyone provide a positive ID? Are they GE or actually Sylvania? Are the two brands the same thing?

 

Cheers, Rich. 


Edited by richdytch - 2/16/13 at 3:31am
post #2764 of 2901

Thanks for the tip.  It turns out I have a version 2.0. 

 

Chad

post #2765 of 2901
Quote:
Originally Posted by Acapella11 View Post


Usually, you have switches for the gain and jumpers for the adjustment to EF95/EF92/EF91 family driver tubes. The version number is written on the board, check the holes in the bottom.

 

 

 

I have switches for both the gain and the tube adjustment.

 

Chad

post #2766 of 2901

Hi richdytch,

 

Crossbranding is very common with vacuum tubes. JHS definitively is Sylvania. Try to look very carefully on the print on the tubes and see if you can find three digit numbers:

188 means GE

312 means Sylvania
 

(I once bought a lot of 8 Mullard M8100/CV4010. One tube was stamped M8100 over the silk screening of a 5654/6AK5W made in USA Sylvania tube!)

post #2767 of 2901
Thanks very much Mordy! Very very helpful.

Rich
post #2768 of 2901
Processed By eBay with ImageMagick, R1.1.1.M1

I just rolled my factory matched pair of Tesla 6f32 into my LD MKIII and my initial impressions are WOW!
Without even being completely being burnt in they are something special.



The most outstanding quality thus far is the Crystal clear sparkling highs, which present themselves with great extension without any hints of sibilance.
with these I find the Highs much more pleasant than the Tung sol 6AJ5 and the the highs of the Tesla's are way more resolved than the Voshkod 6ZH1P-EV.



I find the mids are very neutral they remind me of the Tung Sol 6aj5 mids perhaps a little less warm.
However they are nowhere near the luscious mids of the mullard ef92’s so if you find the mullards to colored you might want to look into a pair of these.

The Bass is deep accurate and clear and very close to the Bass of the Voshkod 6ZH1P-EV perhaps a touch more authoritative...

The soundstage is as wide and deep as any I have heard however it has the added dimensionality of height. I had not been able to discern this before with other tubes but with these tubes there it was.
Highly recommended! I cannot wait to see what they develop into after some burn in.



i will update as the tubes age

Gary
current tubes i own
Sylavania JAN5654
Tung Sol 6AJ5
Voshkod 6ZH1P-EV
Mullard EF92

Power
6n6p gold grid

on the way
Mullard M8083
Mullard M8161
Mullard M8100
CBS / HYTRON 6AK5W
Edited by mojorisin35 - 2/18/13 at 3:25pm
post #2769 of 2901

Hey guys. I've been wanting to tube roll my MKIII for quite a while so today I took the jump and bought a matched pair of "Tung-Sol JTL-6AJ5/6ak5/6J1/EF95" tubes from ebay. I've had a look at my circuit board and it appears to be a Version 4. Are these tubes suitable for that version? I'm not sure where my manual got to. Where I can find out how to set the jumpers for these tubes? (I'm new to this redface.gif)

 

Thanks!!!!

 

post #2770 of 2901
Quote:
Originally Posted by MonolithNZ View Post

Hey guys. I've been wanting to tube roll my MKIII for quite a while so today I took the jump and bought a matched pair of "Tung-Sol JTL-6AJ5/6ak5/6J1/EF95" tubes from ebay. I've had a look at my circuit board and it appears to be a Version 4. Are these tubes suitable for that version? I'm not sure where my manual got to. Where I can find out how to set the jumpers for these tubes? (I'm new to this redface.gif)

 

Thanks!!!!

 

 

personnally i have a version 2.0(written v 2.0) check where i drew a circle for your model number its probably2.0 then those tubes are fine i have a pair of 6aj5 sound good

post #2771 of 2901
Quote:
Originally Posted by MonolithNZ View Post

Hey guys. I've been wanting to tube roll my MKIII for quite a while so today I took the jump and bought a matched pair of "Tung-Sol JTL-6AJ5/6ak5/6J1/EF95" tubes from ebay. I've had a look at my circuit board and it appears to be a Version 4. Are these tubes suitable for that version? I'm not sure where my manual got to. Where I can find out how to set the jumpers for these tubes? (I'm new to this redface.gif)

 

Thanks!!!!

 

 

 

 

your 6aj5 are part of the ef95 family so put jumper on ef95 5654 side which is the right side of picture . the 2 pins starting from right side put jumper on those 2 pins


Edited by MIKELAP - 3/13/13 at 11:44am
post #2772 of 2901

Here is the link to the littledot mk3 manual                            http://dl.dropbox.com/u/6037680/Little%20Dot%20MK%20III%20Reference%20Guide.pdf

post #2773 of 2901
Just a FYI there is a definite difference in sound from the 6aj5 and the 6ak5
post #2774 of 2901

Thanks heaps for the help MIKELAP! That's going to be very useful information when I roll my tubes. Cheers for the heads up mojorisin35. I guess I should do some more research. smily_headphones1.gif

post #2775 of 2901
No worries, not bad just different. I have a pair of tung sol 6aj5 and a pair of 6ak5 booth good tubes but a different sound signature for each which suprised me.. I have some extra tubes of all makes as I went a little crazy so pm me if there are others you want to try or trade.
Gary
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