Upgrading & modding new Oppos, BDP-93 & BDP-95 - Page 17 - diyAudio
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Old 17th August 2012, 04:13 AM   #161
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Oh!

I am trying to find schottkey diode as bridge diodes factor ( 4 elements in it ), but failed.

The rating is more than 10 A, 50 V is enough.
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Old 17th August 2012, 04:43 AM   #162
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Click the image to open in full size.

OCXO board for OPPO 93 / 95




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25 Mhz


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20 MHz

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27 MHz


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Last edited by Jae Hong Lee; 17th August 2012 at 04:46 AM.
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Old 17th August 2012, 04:54 AM   #163
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100% linear power driven 3 OCXOs with new thick aluminium chassi

Only 25 units are made for Korean power buyers.

I hope more units can be made for world wide users

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Old 17th August 2012, 09:39 AM   #164
marce is offline marce  United Kingdom
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Wheres the return path for the clock signals from the add on board?
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Old 17th August 2012, 12:21 PM   #165
Coris is offline Coris  Norway
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Return path of the clock signals is on the GND (of course....). Tabs 2,4 of the old oscillators...
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Old 19th August 2012, 07:18 AM   #166
marce is offline marce  United Kingdom
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Yes very good, but the picture only shows a single core wire, not co-ax or at least twisted pair. Where is the return in relation to the clock signal, its physical location as playing wirth clocks and adding impedance mismatches does not do the clock signal any good. The proximity of the return to the signal is critical for clocks.
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Old 19th August 2012, 02:46 PM   #167
Coris is offline Coris  Norway
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In this case here is maybe about some old pictures of the non finished set up... Not the final one, I suppose.
In fact I do not like very much the idea of an oscillator quite far from the "point of interest", wires and so to transport the high clock frequencies. So short the clock path, so good...
I agree with your above comment.
By the way, for the 27Mhz oscillator/clock is not necessary to feed the clock signal on the old oscillator tabs (under the main board). This is quite difficult and is about very long signal path to rich that point. There is an via which make the connection between that oscillator output and the processor clock pin, on the upper side of that board. Or one may use the processor pin to connect the better 27Mhz clock (and the GND somewhere near that pin).

Last edited by Coris; 19th August 2012 at 03:14 PM.
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Old 27th August 2012, 05:31 AM   #168
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I am looking for thin , but good quality coaxial cable for connecting OCXOs.

Is there some recommendations?
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Old 27th August 2012, 06:46 AM   #169
Coris is offline Coris  Norway
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Quote:
Originally Posted by Jae Hong Lee View Post
I am looking for thin , but good quality coaxial cable for connecting OCXOs.

Is there some recommendations?
I bought it from here:
0.81mm Mini Coaxial Cable, RF Cable, RF Coaxial Cable, Small Cable, Cable Specification, stripping coaxial cable, Manufacturer, Supplier, Factory

Satisfied so far with the business...

Here is another supplier: http://ecmstockroom.com

Last edited by Coris; 27th August 2012 at 06:49 AM.
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Old 27th August 2012, 06:57 AM   #170
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Thank you coris !!
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