Arcam Delta 70.2 digital filter - diyAudio
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Old 7th March 2004, 05:01 PM   #1
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Default Arcam Delta 70.2 digital filter

Hi,
Just found your site-looks great,

I'm a bit of a digital virgin, but I've had great success moding my TDA1451A equipped player. It's got a SRPP ECC88 output stage with battery negative grid bias, a first order passive filter and some PSU upgrades and sounds miles better than standard.

I'm now looking to the next upgrade and wondered if anyone could advise me on the feasibility of bypassing the digital filter in the SAA7220.

Obviously I'd need to do something about the clock but what else?

Any wise thoughts would be appreciated.

Simon:
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Old 7th March 2004, 09:48 PM   #2
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Hi Simon,

Everything you need to bypase SAA7220 digital filter and put your cd player in nonoversampling filterlees mode of operation is here: www.xoomer.virgilio.it/hi_fi/com.htm
- if you have SAA7210 or SAA7310 in DIL, connect pin 23 (SAA7220) to pin 11 (SAA7210/SAA7310)
- if you have SAA7310 in QFP, connect pin 23 (SAA7220) to pin 18 (SAA7310)
This will restore mute function.
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Old 8th March 2004, 10:01 AM   #3
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Hi aparatusonitus,

Thanks for the reply, but the link you posted seems to be dead

cheers,

Simon
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Old 8th March 2004, 10:11 AM   #4
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Oops found it now,

the mod looks pretty simple, so I might stand a chance!

thanks
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Old 8th March 2004, 07:45 PM   #5
Lyra is offline Lyra  Norway
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Quote:
Originally posted by aparatusonitus
Hi Simon,

Everything you need to bypase SAA7220 digital filter and put your cd player in nonoversampling filterlees mode of operation is here: www.xoomer.virgilio.it/hi_fi/com.htm
The link above seems dead to me......

Lyra
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Old 8th March 2004, 07:53 PM   #6
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Try this one: www.xoomer.virgilio.it/hi_fi/index.htm
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Old 8th March 2004, 08:00 PM   #7
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It does't work... Just google the address a bit, then you have it, I hope.
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Old 9th March 2004, 08:44 PM   #8
Lyra is offline Lyra  Norway
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The actual adress was: http://xoomer.virgilio.it/hi_fi/index.htm ....without www.....

Lyra
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Old 27th September 2004, 02:37 AM   #9
Fin is offline Fin
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Default Re: Arcam Delta 70.2 digital filter

Hi Simon

Is the DAC/Audio board in the 70.2 a single or double sided PCB?
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Fin
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Old 27th September 2004, 09:46 AM   #10
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Hi Fin,

The Dac, clock, output stage and various power supplies are on a long double sided board across the back. There's no ground plane unlike the processing board, just traces. I'm interested in why your'e interested!

Simon
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