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Analog Squared Paper Discussion Thread. - Page 191

post #2851 of 3704
Quote:
Originally Posted by xplosive View Post
 

 

Yes I really want to try the w3000anv, but it is very hard to find one.. :D

Last year I bought one from here.   Don't know if they still have it

 

You may also try  Price Japan from who I bought my TH900.

post #2852 of 3704
Quote:
Originally Posted by woodcans View Post


M8 (impedance 1, gain 2, bass +1, treble 0), 1/4 - 1/8 inch adapter, BTG 8 strand mini to mini, tu-05. Volume on M8 set to max. This is Centrance's recommendation for 'line out' (treble and bass settings personal preference). Try it and let us know how you like it! (Impedance of 1 is when the switch is to the far RIGHT).

Thanks a lot for the advice.  Indeed the M8 used as a DAC between the AK100 and the TU-05 is brillant ! at least better than the DAC of the AK100.  

But... it start to be quit cumbersone, and using a HiFiM8 just as a DAC is a pitty.  

post #2853 of 3704

Thank you boringer and bmichels for the links. I have tried them and the 3000anv simply gone. Really put more pressure on the Roxanne now. :D 

 

edited - Just found out that the roxanne impedance is 18 ohm.. i think it will get a lot of hiss from the tur06..


Edited by xplosive - 12/4/13 at 3:37am
post #2854 of 3704
Quote:
Originally Posted by Sam Edwards View Post

Hey Folks
What's the story on the USB POWER OPTION? Does it replace the regular charger?

 

to do something for all of us - if you wait just some days, i have all the parts here for a small external 2x USB to standard tu-05 charger port adaptor - will be around usd$10, easy to make, will post the results next weekend.

post #2855 of 3704
Quote:
Originally Posted by xplosive View Post
 

Just found out that the roxanne impedance is 18 ohm.. i think it will get a lot of hiss from the tur06..

 

Sinceit is a very efficient IEM, may be you don't need a TU-06 and right out of the RWAK will be fine... ? 

post #2856 of 3704
Quote:
Originally Posted by bmichels View Post
 

 

Sinceit is a very efficient IEM, may be you don't need a TU-06 and right out of the RWAK will be fine... ? 

 

yes it should. but so far the tur06 + ak100 makes my headphones sounds much better. hope it won't hiss too much..

or maybe i will ask Shikada san to lower the gain on my tur.

post #2857 of 3704
Quote:
Originally Posted by xplosive View Post
 

 

yes it should. but so far the tur06 + ak100 makes my headphones sounds much better. hope it won't hiss too much..

or maybe i will ask Shikada san to lower the gain on my tur.

YEP, this is why I asked to Shikada san to include 2 imput jacks in my TU-05:  0dB & -6 dB.  In fact the -6dB jack is connected with some resistors in serial..Simple.

 

 

post #2858 of 3704
Quote:
Originally Posted by GermanGuy View Post

to do something for all of us - if you wait just some days, i have all the parts here for a small external 2x USB to standard tu-05 charger port adaptor - will be around usd$10, easy to make, will post the results next weekend.

Thanks GG!
post #2859 of 3704

wow that is one good idea bmichels.. you can also share your tu-05 for two. for now just wait and see..

 

i am listening to my heaven II with tur06 and guess what, it does not make any hiss.. :etysmile:

post #2860 of 3704
Quote:
Originally Posted by xplosive View Post
 

wow that is one good idea bmichels.. you can also share your tu-05 for two. for now just wait and see..

 

i am listening to my heaven II with tur06 and guess what, it does not make any hiss.. :etysmile:

 

did you had a chance to compare sound of  TU-05 and TUR-06 ?   I am still wondering if I should not have bought TUR-06 instead of TU-05 !!

post #2861 of 3704
Quote:
Originally Posted by bmichels View Post
 

Thanks a lot for the advice.  Indeed the M8 used as a DAC between the AK100 and the TU-05 is brillant ! at least better than the DAC of the AK100.  

But... it start to be quit cumbersone, and using a HiFiM8 just as a DAC is a pitty.  

 

Yes, it's a bit cumbersome, but it makes my th900's sing beautifully. The 3003's, on the other hand, do great straight out of the m8. (Sort of) pocketable.

post #2862 of 3704
Quote:
Originally Posted by woodcans View Post
 

 

Yes, it's a bit cumbersome, but it makes my th900's sing beautifully. The 3003's, on the other hand, do great straight out of the m8. (Sort of) pocketable.

 

And is  RWAK100 > M8 > 3003  really better than  RWAK100 > 3003  ?

post #2863 of 3704
Quote:
Originally Posted by bmichels View Post
 

 

And is  RWAK100 > M8 > 3003  really better than  RWAK100 > 3003  ?

 

 

I don't have an RWAK anymore. iPhone>m8>3003 is fantastic. But it is certainly a brick.

post #2864 of 3704

the modder 's diary part 08:

 

thanks to the post of sam edwards about usb charging and to get the job done i started to build my long planned universal tu-05 charger and power supply interface:

 

it is based on a dc/dc step up / step down converter, followed by a constant current stage and a voltage regulator stage:

 

 

on the left you can see the combined dc/dc step up / step down converter board, cheap and available on ebay. while not super efficient it has the benefit that the output voltage is absolutely independent of the input voltage, which is a plus not only for charging li-ion batteries but also for the following constant current and voltage regulator stage to minimize dissipated heat.

 

on the right you can see a prototype board with an usb connector, an additional connector as second input and the integrated regulators for constant current and voltage.

 

in addition i added a bridge rectifier and a capacitor after the second input, so the board can be connected

 

- to usb to use the usb +5v 500 mA

- any DC voltage from about 2 to 30 volt

- any AC voltage from about 1,5 to 22 volt

 

an additional benefit of the bridge rectifier is that the second input is independent of the polarity!

 

the prototype board is not fully assembled, some resistors, diodes and capacitors and the output connector are missing, but you can see how it looks and works.

 

for the constant current regulator and the voltage regulator the LM317 can be used or as i did the LM350. i mounted the regulators with an additional aluminium piece for slightly better cooling.

 

 

when finished the dc/dc converter board can be mounted above the prototype board, so the current flows from the input to the dc/dc converter board and then through the regulators.

 

 

on the back of the prototype board you can see the really hardwired, but working connections between the components. at the moment i am looking for a good UV light and then will start designing and making my own custom pcbs as i did in the past.

 

 

just an idea of how to build a complete module.

 

how it works:

 

- the input voltage of USB or of the second input is connected to the dc/dc converter. as the following stages need at least about 2 volt difference between input and output to work stable the dc/dc converter will be adjusted to about 12.5 to 13 volt.

 

the output of the dc/dc converter is used to feed a constant current source based on the LM317:

 


i calculated the resistor r1 for a constant current of about 350mA, so the TU-05 battery will be charged in about 8 hours AND the usb port will not be damaged because the current is within the limits of the usb 500mA plus some current for the dc/dc converter.

 

it is also possible to provide a second resistor for about 700mA constant current and a switch to toggle between single and double usb port connection (when using one of these double usb power cables you find sometimes delivered with usb hard disk or dvd burners).

 

the constant current source is needed because li-ion batteries have to be charged with contant current and constant voltage.

 

for the constant voltage the output of the constant current source is then connected to a voltage regulator also build around the LM317 (and thanks a lot to the people having posted the schematics on internet!):

 

 

 

The voltage regulator has to be adjusted to exactly 8.4 volt!

 

The result is an universal charger and power supply interface for the tu-05 which can be used with any power source from 2 to 22 volt (AC) or 30 volt (DC) from solar panel to car battery or whatever, to run AND charge the tu-05, even with USB. just to mention this interface also replaces the car charger!


Edited by GermanGuy - 12/4/13 at 3:54pm
post #2865 of 3704

the modder 's diary part 09:

 

learning a lot these days. first of all i am now using the prototyping boards i always used in the past not only with soldering points but complete lines, it is much easier (at least for me) to build components without making mistakes, and so i have completely rebuild the different parts of the charger interface:

 

 

bottom left you see the pcb prototyping boards i am now using, on the right the old one. also i now use solder with an diameter of 1mm instead of 0.5mm, you can solder much faster and so the components get not so hot while soldering.

 

top left you see the different components of the charger and PSU interface, from left to right:

 

- input for ac voltages with bridge rectifier and capacitor

- USB input with capacitor

- constant current stage

- voltage regulator stage

 

and top right the dc/dc step up / step down converter i use.

 

best of all i have tested the different components (after some debugging and minor mistakes including damaging the usb port of one of my notebooks) and everything seems to work now.

 

all components connected the input stages for both ac and usb are working as input for the dc/dc converter (the converter output adjusted to 13v), the constant current stage delivers about 350mA and the voltage regulator stages exactly 8.4v and 350mA when shortening the output.

 

the only point i was not able to test is to use the components to run and charge the tu-05 as i have no complete tu-05 running at the moment.

 

and here is the schematic (hopefully without any errors):

 

 

so everybody now can run and charge his tu-05 even with USB.

 

@Sam Edwards - hope this helps !


Edited by GermanGuy - 12/5/13 at 4:54pm
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