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UPGRADING THE CRYSTAL (X0) ON ESSENCE STX - Page 14

post #196 of 240

Hello. Have anybody recommendations for choosing an oscillator?

I'm going to order at mouser.сom all necessary details for tweaking

 

Is this XO ok? http://ru.farnell.com/fox/fxo-hc736r-24-576/osc-5x7mm-smd-cer-24-576mhz/dp/1641004?Ntt=FXO-HC736R-24.576


Edited by KingFiercer - 5/10/10 at 1:41pm
post #197 of 240

 

KingFiercer, this is mine, but is under construction.... 

 

 

Hi everybody

Someone has experience with slowed sounds on STX ?

I change the 24.576MHz TCXO crystal oscillator on my STX, but all the sounds are slowed by 30%

What does it mean ?

I need help

 

20100525224208_DSC05991.JPG

Joy!

post #198 of 240

I've just upgraded my ST with the 0.3ppm Vanguard you can find on ebay

 

img3280cv.jpg

 

img3286p.jpg

 

Sound improvement is definitely huge!

post #199 of 240

Very nice! How did you mount the TCXO on the card?

post #200 of 240

I removed the original xo by using two irons simultaneously on the two pads (I would not try this using just one iron as you would end up overheating and possibly damaging the board), then I insulated the area with tape and soldered the new xo as pictured below.

Extending the gnd pin is not needed, as it would be long enough by bending it in the right direction.

 

img3294.jpg

 

img3298o.jpg

post #201 of 240

Very nice photos. Thanks for the explanation.

post #202 of 240

Catx: your pictures made installation very easy, thanks.

 

Not sure if someone already advised to use small tweezers to hold the leg near the body while soldering.

post #203 of 240

I'm glad they helped you installing your new xo

What do you think of the performance? Did you use the same tcxo?

post #204 of 240

Yes, I'm using exactly the same golden crystal; the performance improvement (clarity) on my ST was rather minor, but still noticeable.  It's difficult to compare  without rolling back to the old xo.

post #205 of 240

Hi All ...

 

I want to modify my STX X0 with Vanguard TCXO 24.576MHz 0.3ppm (like catx's X0 above)

But I am not a capable electronical person so I want ask few questions before, I hope somebody can answer them ...

 

stxx0.jpg

 

After remove original X0 then :

1. Joint GND TCXO to point 1

2. Joint Output TCXO to point 2

3. Joint VDD TCXO to point 3

Are these correct steps? I see catx use VDD input at point 3 on his ST that I assume it provide TCXO with +5VDC

 

Thanks in advance

post #206 of 240
Quote:
Originally Posted by catx View Post

I'm glad they helped you installing your new xo

What do you think of the performance? Did you use the same tcxo?



Great pictures and mod.  Nice clean job.  I ahev been considering this mod myself but haven't got around to it yet.

Have you considered removing the coupling capacitors on the outputs.  This would also improve the sound further but is mainly for line output.

post #207 of 240
Quote:
Originally Posted by kinonotabi View Post

Hi All ...

 

I want to modify my STX X0 with Vanguard TCXO 24.576MHz 0.3ppm (like catx's X0 above)

But I am not a capable electronical person so I want ask few questions before, I hope somebody can answer them ...

 

stxx0.jpg

 

After remove original X0 then :

1. Joint GND TCXO to point 1

2. Joint Output TCXO to point 2

3. Joint VDD TCXO to point 3

Are these correct steps? I see catx use VDD input at point 3 on his ST that I assume it provide TCXO with +5VDC

 

Thanks in advance


Correct, you can follow the instrunctions on message #95 but make sure you connect vdd input to a +5V source (for example output pin on the 7805)

 

Quote:
Originally Posted by ROBSCIX View Post


Great pictures and mod.  Nice clean job.  I ahev been considering this mod myself but haven't got around to it yet.

Have you considered removing the coupling capacitors on the outputs.  This would also improve the sound further but is mainly for line output.


 

Well, I listen to my hd 555 connected to the headphones amp output 99% of the time, otherwise I would surely give the coupling caps bypass mod a try.

At the moment I'm trying to find a good replacement for the original I/Vs, now I'm using some LT1028 on mono to dual converters but I don't like them, they are absolutely more neutral/natural than stock 2114Ds but they lack in soundstage and bass detail.

I'll give them some time to burn-in but I doubt it will make any noticeable difference.


Edited by catx - 10/7/10 at 4:04pm
post #208 of 240

Hello,

I bought a Vanguard TCXO 24.576MHz 0.3ppm for replacing an  orig. in my essence ST . I have changed it according to your advice. But I´m disappointed. The sound is worse then before. It is easy to compare. A resolution of instruments is lower, and Bass is not so deep like before. The Soundstage is narrow. I had to return the orginal back. It is weird. Can you advice what I should do. Maybe the crystal is fake. But hong kong  shop has good reference. 

post #209 of 240
Quote:
Originally Posted by GWorlDofSPACE View Post

Here is a picture how to upgrade the clock crystal on stx!
1 POINT: unsolder the stock crystal
2 POINT: solder a wire to point 1(red mark) and connect to output of your new crystal
3 POINT: solder a wire to point 3(red mark) and connect to ground of the new crystal
4 POINT: solder DC 12V power supply wires to new crystal
THATS IT!

 

I'm trying to do this upgrade and I don't understand step 4 - what do you mean solder the 12V power supply to the new crystal? You mean that 4-pin connector you plug into the back of the STX?
 

 

post #210 of 240

Just found this topic, great one btw.

 

About that +12V for clock/cristal, you cannot do that with Vanguard is rated +5V only!

 

I'll check my STX tomorrow to see where to get those +5V nearby, but the easy (and dirty) solution is still from Molex.

 

 

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