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Analog Squared Paper Discussion and Appreciation Thread. - Page 194

post #2896 of 3488

no, i don't. what i posted is only an universal charger and psu interface to charge the tu-05 with usb or any external power supply unit, whether AC or DC! this unit replaces the car charger delivered with the tu-05.

 

p.s.. i went to a normal public (but excellent) german high school with special focus on and divisions for languages (ancient greece, ancient latin, hebrew, russian, english, french, german language) and science (physics, chemistry, biology, mathematics) and a lot of working groups and extra courses like religion, philosophy, photography, theater, sports (skipped that), computing / programming before studying experimental nuclear physics.


Edited by GermanGuy - 12/7/13 at 8:49am
post #2897 of 3488

GermanGuy,

 

Having the ability to charge the tu-05 via a USB port or other sources would be wonderful, as the only thing that bothers me about the amplifier is it's quirky and cumbersome charger.  

 

Quote:

Originally Posted by GermanGuy View Post
 

no, i don't. what i posted is only an universal charger and psu interface to charge the tu-05 with usb or any external power supply unit, whether AC or DC!

 

p.s.. i went to a normal public (but excellent) german high school with special focus and divisions for languages (ancient greece, ancient latin, hebrew, russian, english, french, german language) and science (physics, chemistry, biology, mathematics) and a lot of working groups and extra courses like religion, philosophy, photography, theater, sports (skipped that), computing before studying experimental nuclear physics.

post #2898 of 3488

agree - have just the same opinion. i would say it this way - shikada san spends all his effort and all his competence in developing best of best portable amps and that is what counts.

 

for my charger interface - it's running, i successfully charged my tu-05 battery pack, but some finetuning needed (low drop voltage regulators and maybe a discrete constant current stage, too much energy wasted at the moment), but as i share and send all my results, schematics or pcb layouts to shikada san to be freely used by him if he wants, maybe in the future this will be a standard product or part you can order.


Edited by GermanGuy - 12/7/13 at 2:59am
post #2899 of 3488

another solution to charge and run the tu-05:

 

while you can not use this solution to run the tu-05 connected to an usb port, this solution itself is complete and provides additional battery power for the tu-05.

 

for this solution you need an usb battey pack with additional 12v output like this one i am using:

 

http://www.conrad.at/ce/de/product/251166/Tecxus-Mobiler-Zusatzakku-TP-10000-LiPo-10000-mAh-17250-powerBank-TP-10000-Mobile-Stromversorgung-Zusatzakku-Energier?ref=list

 

 

Read more: (Click to show)

 

it provides two USB 5v 2100mA outputs and in addition an output with 9v or 12v 2100 mA and comes with lots of adapters. it can be charged while beeing used.

 

the 12v output is what is needed for the tu-05 car charger.

 

i think this is a similar one that can be found on amazon:

 

http://www.amazon.com/EZOPower-10000mAh-Rechargable-Protective-10-1Tablet/dp/tech-data/B00AFSOH8I/ref=de_a_smtd

 

the easiest solution is to connect a fitting connector instead of the car connector that is provided with the car charger or as i did to have everything somewhat smaller, to extract the car charger pcb board and mount it using a new, smaller case:

 

here you see the car charger internal pcb board:

 

 

 

in general it is enough to provide a new input connector that fits the output jack of the usb power pack:

 

 

i used some red shrink-on tube to visually see that this is the input connector.

 

as i had no small case i made one out of a piece of plastic (tupperware):

 

 

here you see the pcb mounted with some superglue around the led and the cables:

 

 

case closed with superglue:

 

 

and here with some strong tape around (of course looking somewhat improvised):

 

 

this is the complete set to charge and run both the external usb power pack and the tu-05:

 

 

so while it is not possible to directly run and charge the tu-05 with usb power, i think it nevertheless is very usefull as it provides additional power for the tu-05 when on the road, you can not only charge and run the tu-05 but also your mobile phone, tablet and any device with usb, 9v or 12v input, it's real portable (and much easier to modify only the car charger than building the usb charger interface i posted before).

 

Short note: be very careful and check the right polarity of the new connectors. btw, i have tested everthing and it works!


Edited by GermanGuy - 1/1/14 at 4:06am
post #2900 of 3488

the modder 's diary part 10:

 

in parallel of thinking about the best power supply i also did some work on how to arrange all the components to have a full double mono star topology of the power and signal paths.

 

to achive this and also to minimize the influence of the power consumption of one tube to the other tubes, it is important to connect power BETWEEN DF91 and DL 92 and not at the end after the DL92.

 

and to have a star topology of the power paths in general independent of using one power supply for all tubes or for left / right channel or for each tube separately the tubes have to be positioned in a different way:

 

    DF91        DL92     - left

 

           Power

 

    DF91        DL92     - right

 

to really implement and test this i made a modular tube base to learn more about the real implementation, placement of electronic components, separating and separated layers for input signal path, anode voltage, led voltage, filament / heater voltage, output signal path.

 

Read more: (Click to show)

for easier drilling and shaping i made the prototype tube section out of pertinax prototyping boards where also components can be placed and soldered:

 

 

here you see the new arrangement of the tubes and tube sockets to provide a star topology for the power paths and additional pcbs for the next layers::

 

 

the orientation of the tube sockets is as you can see on the picture above so that most of the pins for filament / heater power are oriented / placed in the center / middle of the pcb to have this power path as short as possible.

 

first layer with the tube sockets mounted:

 

 

at the moment i think of using this first layer for the filament / heater voltage. the tube sockets are NOS german ceramic ones, hart plated gold contacts, a tunnel in the middle that can be used for the led's, and even providing the possibility of mounting metal shields for the tubes.

 

second layer:

 

 

at the moment i think of using this layer for the eletronic parts and components, i.e. the signal paths.

 

third layer:

 

 

at the moment i am thinking of using the third layer for the anode voltage and anode voltage stabilisation.

 

the center hole for a thick ground line is missing and not drilled at the moment

 

as can be seen the led's to illuminate the tubes can be inserted through the middle hole and channel provided by the tube sockets, so it is much easier to change the led's and so the color of the light. and of course the led power path so is also separated.

 

everything mounted together:

 

 

 

 

and here with tubes (but inserted differently than posted above):

 

 

 

 

don't know if this is the final arrangement for the layers, and if the space on the pcbs on the left and right is not needed, i will cut the pcbs later.

 

this will be my first complete rebuild of a tu-05!


Edited by GermanGuy - 1/1/14 at 4:08am
post #2901 of 3488
Quote:
Originally Posted by GermanGuy View Post

 

while you can not use this solution to run the tu-05 with external (battery) power, this solution itself is complete and provides additional battery power for the tu-05.

 

 

Hey GG,

Can you explain this? If one buys/makes this solution, what are the exact limitations? 

Thanks,

Sam

post #2902 of 3488

the limitation is that you can not directly use an usb port to run or charge the amp. the benefit is that it is easy to make and adds extra battery power.  and thanks for your question, i just saw there was a severe error writing external power instead of usb. so the correct sentence is:

 

while you can not use this solution to run or charge the tu-05 connected to an usb port, this solution itself is complete and provides additional battery power for the tu-05.

 

btw 1, i just find it more compact and much nicer than this car power jack and connector.

 

btw 2, one could even directly connect the power supply unit of this set to the charger adapter, but you have to use the batterypack in between because the jacks are not compatible for a direct connection.


Edited by GermanGuy - 12/7/13 at 11:56am
post #2903 of 3488

the modder 's diary part 10a:

 

this is the tube section for the extended tu-05 case:

 

 

the positions of both tubes and the socket pins are optimized for the double mono design and short power paths, the components can directly be soldered.

 

More pictures: (Click to show)

 


Edited by GermanGuy - 1/1/14 at 4:09am
post #2904 of 3488
I think it's time for you to change your handle from GermanGuy to GermanGenius.

Has anyone else noticed a piercing hiss (for lack of a better term), when a metal object contacts the case, or the case is grounded? It seems to only happen on the left channel, on my unit. Easily avoidable, and I only noticed it by accent, but I am curious.
Edited by woodcans - 12/7/13 at 3:19pm
post #2905 of 3488
Holy Smokes GG, as WC says, German Genius is a better nome de plume!

WC, I just tried this on mine as I have just changed the 3S4 stage to the vintage Ken Rad's and did not experience what you have experienced. I wonder if GG might have an idea as he is our resident "Boffin" ( And for those who were not born British of a certain era as this old fart was here is the wiki explaining "Boffin", I think it fits our GG to a "T"!...... http://en.wikipedia.org/wiki/Boffin )!
post #2906 of 3488
Quote:
Originally Posted by woodcans View Post

I think it's time for you to change your handle from GermanGuy to GermanGenious.



Has anyone else noticed a piercing hiss (for lack of a better term), when a metal object contacts the case, or the case is grounded? It seems to only happen on the left channel, on my unit. Easily avoidable, and I only noticed it by accent, but I am curious.

 



interesting, have to think about. some questions:

- don't understand how this sound sounds
- any metal object or a special one
- maybe a magnetized metal object
- are you sure your ground is really ground.
- does this happen without signal and input cables, volume turned down to zero

the first crystal radios just worked by connecting one side to real ground and the other to an antenna of fitting length.

you can be an antenna when touching a grounded but not shielded device.

is your input cable a coax type and the inner wire the right but the outer wire the left channel?

....
post #2907 of 3488
forgot to mention static electricity, sounds very similar!
post #2908 of 3488

 

Spend most of the day on cleaning the tubes and do some tube rolling on the tur06. After two charge cycle df96 phillips is the clear winner! it provides more power, and most dynamic sounding. mid high low are sound incredible with this tube. Sound opening up beautifully better than the silvania now. Highly recommend for tur06 owner.

Other tube tested: telefunken df96, silvania it4, and radio technique 1t4.

The little noise on the background still  there but get less annoying. imo the problem is the df96 tube are more sensitive than the 1t4. No noise problem on the 1t4 tubes only on df96 tubes.

 

note: noise only heard on headphones with less than 90 ohm impedance.

post #2909 of 3488
how did you clean the tube pins?

noise only heard on headphones with less than 90 ohm impedance? maybe only on headphones with high sensitivity?
Edited by GermanGuy - 12/8/13 at 6:33am
post #2910 of 3488

I use toothbrush, astonish paste, alcohol 95%. :D

 

yes noise only heard on low impedance headphones but only when i uses df96 tubes. on 1t4 tubes there is no noise even on my sensitive iem.

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