Little Dot Tube Amps: Vacuum Tube Rolling Guide
Feb 13, 2018 at 5:53 PM Post #11,416 of 13,432
I have these,I haven't find a time to work on it I plug-in my MK III to these and it's quiet i don't hear the slight HUM that i hear when i turned the volume pot all the way up.

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Mar 8, 2018 at 3:54 PM Post #11,422 of 13,432
Hello everyone,
I have LittleDot3 + Shure940. Drive tubes - Tesla 6F32, Voskhod 6sh1p-ev, Yugoslavia 6AK5.

Recently i have changed an original russian power 6h6p for 6h6p NOS with gold grids (1970s) on my LT3. I am suprised that overall sound is "brighter" with thin bass. I assumed an improvement but the original tubes sound better with more "drift" for my ears :). Does anybody have similar experience? Do you recommend to try tubes 6h6p-i? Thank you for an advice.

Ebay auction:
https://www.ebay.com/itm/182879364513
 
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Mar 8, 2018 at 5:28 PM Post #11,423 of 13,432
Hi JB,
As with all new tubes, they require a break in period, usually in the range of 30-50 hours (although some tubes take make longer to come to full potential).
First see if they improve over time.
The IR tubes sound better than the regular ones and are not too expensive;
https://www.ebay.com/itm/Lot-of-4-p...hash=item1edb1b6775:m:mRLUi3yYPe7Vw1tV0J9INXA
Then there is 6H30 DR which are very expensive in the range of $400-500/pair (I never tried them) that are supposed to be the best of this type but probably not worth the price in terms of improvement.
However, my suggestion is to go a different route: Buy a pair of 6SN7 octal tubes (cheapest works just fine) and a pair of adapters for use in the LD MKIII. It is just plug and play, and this combination with the Ei 6HM5 Yugoslavian tubes is pretty much the best sound you can get from the LD MKIII.
If you look on the Little Dot blogs you will find a wealth of information.
 
Mar 9, 2018 at 1:23 AM Post #11,424 of 13,432
Hi Mordy,

Firstly thank you very much for detail answer. I have seen the adapters for 6SN7 but I didn't have a trust with them :). I have a tube integrated amplifier Yaqin with cathode followers 6N8S(6SN7) NOS Photon :p. But I know that many tube beginners make a tube rolling without a knowledge and don't care about specific parameters of tubes which can damage an amplifier (e.g. overload transformers). I will read the forum with LT3/6SN7 through. Thank you for tip.
 
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Mar 9, 2018 at 7:43 AM Post #11,425 of 13,432
I have both the 6SN7 and 6N6P-ir tubes, and honestly I like the 6SN7 sound better.
However, the 6sn7 works only with my >300 ohm headphones.
I heard distorted sound using the 6SN7 with my low-Z cans (AKG 712, 701). As your Shure's impedance is about 40 ohm , I suggest you stay with the 6H30 or 6N6P, which I have no problem with low-Z cans.
Of course, YMMV!
 
Mar 13, 2018 at 5:10 PM Post #11,426 of 13,432
I was very satisfied with a combination AKG702+LT3 but I had to change them for a closed headphones. I have just put tubes GE 5star 5654 into my LT. First expression is the same as on the opening page of thread (clear, airy, wide soundstage). A tasting is going to begin because I bought JAN GE 5654W, RAYTHEON JAN5654 too :).
 
Mar 16, 2018 at 10:43 AM Post #11,428 of 13,432
i dun seem to be able to register on http://www.littledot.net/forum/index.php

nor is there a link to the board admin's contact.

can anyone help by providing email contacts please?

much appreciated.
Their forum has it's new member registration option disabled and the admin contact is disabled as well.

You can contact the creator on eBay:
https://www.ebay.com/usr/davidzhezhe

Or through the listed gmail address:
little.tube@gmail.com

I have no idea if anything sent to those places will be answered, if it's a "will tube XXX or headphone XXX work" question, then I doubt you will even get a reply.
 
Mar 16, 2018 at 6:12 PM Post #11,429 of 13,432
Testing of RAYTHEON JAN5654 ... a vigorous, engaging sound maybe no clear like Tesla 6F32 but it doesn't matter :).
 

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