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Philips 11.289Mhz crystal osc
Philips 11.289Mhz crystal osc
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Old 11th May 2020, 08:43 PM   #1
KHashmi316 is offline KHashmi316  United States
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Default Philips 11.289Mhz crystal osc

Below is an original Philips 11.289Mhz crystal osc. I extracted it from a late 1980s Philips CDP....
Click the image to open in full size.

It still works fine in a CDP, but I have no any means to measure it (spectrum analyzer, etc) in order to, say, compare it to a Laptech, CTS, Vanguard, etc.
Also, I don't know how it has aged over the past 3+ decades.

Please provide feedback on these concerns per your experience.

Thanks!

Last edited by KHashmi316; 11th May 2020 at 09:40 PM.
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Old 11th May 2020, 09:14 PM   #2
MarcelvdG is offline MarcelvdG  Netherlands
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That's not a crystal oscillator but just a crystal. It may have aged by a couple of ppm, but even if you have an absolute hearing, that will be too little to worry about. Compared to modern crystals, it probably has a lower impedance and a higher maximum drive level - which may or may not result in less phase noise, depending on what the oscillator circuit looks like.
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Old 11th May 2020, 09:39 PM   #3
KHashmi316 is offline KHashmi316  United States
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Quote:
Originally Posted by MarcelvdG View Post
Compared to modern crystals, it probably has a lower impedance and a higher maximum drive level - which may or may not result in less phase noise, depending on what the oscillator circuit looks like.
How about in its native (stock) environment -- in the stock Philips CDP with the, e.g., SAA7210 acting as clock generator?
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Old 11th May 2020, 09:42 PM   #4
Markw4 is offline Markw4  United States
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Unlikely it is SC cut, they cost too much to make.
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Old 11th May 2020, 09:54 PM   #5
MarcelvdG is offline MarcelvdG  Netherlands
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Quote:
Originally Posted by KHashmi316 View Post
How about in its native (stock) environment -- in the stock Philips CDP with the, e.g., SAA7210 acting as clock generator?
I know far too little about the SAA7210 to give you a definite answer, but the SAA7210 and this crystal were designed to work together, so chances are that the SAA7210 will work better with this crystal than with a more modern crystal that has a higher impedance and a lower maximum drive level.
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Old 11th May 2020, 09:59 PM   #6
MarcelvdG is offline MarcelvdG  Netherlands
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Quote:
Originally Posted by Markw4 View Post
Unlikely it is SC cut, they cost too much to make.
It's very probably an AT cut crystal.
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