Oscillator in HK HD970 CD Player - diyAudio
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Old 5th April 2006, 07:06 PM   #1
reins is offline reins  Germany
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Default Oscillator in HK HD970 CD Player

Hi,

I found this oscillator in my CD player:
M3h54F by M-Tron
Specs: http://www.mtronpti.com/pdf/m3hmhR_datasheet4506-1.pdf
Sounds good to me with 5 ps RMS or did I miss a thing?

Stephan
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Old 15th July 2007, 09:31 AM   #2
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This I believe to maybe be the next sleeper.
Yes that is a good oscillator the 4 pin M3h54F by M-Tron is far better than the run of the mill 2 leg $1 oscillator that are usually found inside 2 channel cd players, it also is using the very well speced AD1955 dac, no slouch this one.
And no NE5532 for I/V conversion but one of my favourites for sounding a bit tubey the OP275 then a OPA2134 for balanced diff to single ended conversion and the best now to come a complete discrete class A push pull output amp. And the whole shebang is direct coupled from whoa to go, using a dc servo.
This player has been very well thought out, and it's cheap, I forgot you can also use it as a stand alone DA converter if you have a better transport than what comes with it, (my clocked Teac vrds10se) as a transport sounded better than the inbuilt transport, not by a huge margin thou. Maybe with a top line clock it's own transport will be even better.
Below are some circuits.

Cheers George
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Old 15th July 2007, 09:32 AM   #3
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I/V stage


Cheers George
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Old 31st July 2007, 05:31 AM   #4
kello is offline kello  China
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Default good player

Very good design and good performace.

even CD player mode or DAC mode.
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Old 31st July 2007, 10:28 AM   #5
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Default Re: Oscillator in HK HD970 CD Player

Quote:
Originally posted by reins
Hi,

I found this oscillator in my CD player:
M3h54F by M-Tron
Specs: http://www.mtronpti.com/pdf/m3hmhR_datasheet4506-1.pdf
Sounds good to me with 5 ps RMS or did I miss a thing?

Stephan

Hi Stephan

- The measurement bandwidth spec of this osc is missing
- Why use a PLL in a master mode apparatus ?

best
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