Upgrading & modding new Oppos, BDP-93 & BDP-95

[Jae Hong Lee]

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.

[Jae Hong Lee]

OCXO board for OPPO 93 / 95






25 Mhz





20 MHz



27 MHz

[Jae Hong Lee]

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

[marce]

Wheres the return path for the clock signals from the add on board?

[Coris]

Return path of the clock signals is on the GND (of course....). Tabs 2,4 of the old oscillators...

[marce]

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.

[Coris]

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).

[Jae Hong Lee]

I am looking for thin , but good quality coaxial cable for connecting OCXOs.

Is there some recommendations?

[Coris]

Originally Posted by Jae Hong Lee

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

[Jae Hong Lee]

Thank you coris !!