Congratulations! Which one is yours? Isn't there a mini balanced jack on the green one?
The modder's diary part 23:
yesterday finetuned the voltage filter boards and also modified the filament voltage of shikada-san's internal power supply boards to be somewhat higher for the capacitors to be decoupled by resistors so the hole filament voltage filter better working.
i modified the anode voltage capacitors directly placed on the amplifier channels and added 7 times the capacity, which is a real benefit as now my hardcore test track (tschaikowsky, telarc, ouverture, 1812) can be played at live level without even the idea of any bass distortion, a real improvement.
also i modified my grado style headphone replacing the 6.3mm jack by a 4pin xlr one and did the same on the amps side.
after also building a new input board with input transformers and a potentiometer (of course a Shikada-san original one) the amp now fully works double mono.
another benefit of the input transformers (good, but sure not exceptional, just neutrik studio ones) is that they transform the signal 1:2 so providing some additional "amplification".
i must say that the result was or is worth the effort up to now, stellar sound, increased soundstage wide and depth (the depth interestingly caused by the voltage filter board), more stable presentation, very clean, clear and deep bass at any level and (the highs of the tu-05 were never harsh or something like that) the highs are don't know how to say more relaxing, sweet, not harsh, not grainy, beautiful, precise. also the imaging got more pin-point like than before, which is a real benefit for me as this was one point for me to be improved due to the small weakness of my grado style headphones in this area.
the overall presentation has changed in a way hard to describe. in the past i often have written in my tube reviews that the impression of the soundstage and feeling for the space were based or build by the highs or by the lows, bass, and this now has gone. the presentation is absolutely coherent, nothing wired or to think of left, just beautiful music where all fits together.
on the other hand when listening to the right music, f.e. techno, Yello, UK dub step, the amp has such a fun to play, to rock, in German Language we say "geht ab wie ein Zäpfchen" (impossible to translate), bass pulses just explode, you can listen at any level without any change in sound stage, any compression or sound degradation. and again, absolutely homogenous.
at the moment and at the end of my holiday, i think i can now paint the tango output transformers and then put everything together in my desktop case.
P.S. forgot to mention that due to the doubled battery capacity the amp has a runtime of nearly 15 hours.
Congrats on the Ten! I'm still living with one and it's in the box waiting for partner (who may well not be compatible so probably a short term relationship). I wonder where he sources these things!! They're so hard to find!
Although I've had my TUR-06 since Aug, I hadn't really paid much attention to them until I got my Alpha Dogs and the synergy between them is (my)mindblowing. I've not tried tube rolling the TUR-06 on the ADs though. I can't remember what the Sylvanias are now that I've been on my NECs.
THE TU-05 FOR ME IS AN OUTSTANDING AMP AND VALUE!
i have the feeling and it is important for me to mention here that the tu-05 is an outstanding amp and a great value (as it is).
when i got the tu-05 and after some tube rolling (but even before) there was NO amp in my inveventory that came even near to the sound quality of this little gem.
one of my next actions surely wll be to rebuild my original tu-05 as it is or was to enjoy this sound quality wherever i am.
this amp rivals big desktop amps and especially related to its tiny size, portability and battery driven design the sound quality can't be judged high enough.
i had a lot of amps before but all gave me maybe one benefit but always at the cost of one weaknees, the Cayin HA-1A much to noisy with low impedance, the Alo Contintental V2 with great soundstage but weak bass, the Vorzüge AMP Duo just the opposite, but then i got my TU-05 (thanks to a recommendation of Ianmedium), WOW, ... ,no compromise, improving really every aspect of sound.
a thousand thanks to Shikada-San for his openess, great support in general and that he supports me in such a great way designing my own tu-05 desktop version making all this possible.
just want to mention that i have over 150 tubes "on stock" and as i am really focussed on my beloved RFT97 - PHILCO 1S4 combo feel free to ask if you want a special tube absolutely not available after intensive searching. found it interesting that less and less different tubes are available on ebay, so it gets harder and harder to find ones dream set.
Very interesting indeed: a very affordable way to enhance an existing system !
thank you for sharing your amazing efforts in the quest of musical excellence!
Truly awe inspiring.
"also i modified my grado style headphone replacing the 6.3mm jack by a 4pin xlr one and did the same on the amps side.
Could you please explain for me what the advantage is in changing the 6.3mm plug on your Grado style headphone is?
"in German Language we say "geht ab wie ein Zäpfchen" (impossible to translate)"
Also out of curiosity I tried a Google translation of the German phrase you quoted and got this :- "goes down like a suppository" o_O
Is this what you meant??
the sentence can't be translated, but think of a rocket starting up to the sky with enormous speed... (the shape of a rocket and a suppository is quite similar, originally this was a marketing slogan).
a headphone connected with an 6.3mm jack shares one ground line for both channels, where a 4 pin xlr connector makes it possible to connect the left channel of the headphone to the left output transformer and the right channel to the right output transformer without any connection between left and right, so completely separated.