looking for All BJT i/v output stage

cbriere · 30th January 2008, 07:45 PM

For the PCM1792A, witch is differential.
4 pins : IoutL-, IoutL+, IoutR-, IoutR+

tks

kevinkr · 31st January 2008, 04:45 PM

You looking to build or looking to buy?

LC Audio makes the Zapfilter which will do exactly what you are looking for.

cbriere · 31st January 2008, 06:18 PM

the Zapfilter look good.
I need to build it for myself.
I found the schematics but no par values on it

did someone has builted a clone of the zapfilter?

jwb · 31st January 2008, 06:22 PM

Hawksford's scheme uses only BJTs.

cbriere · 31st January 2008, 06:31 PM

Hawksford....... schematics available?
please post link,,,,,tks

kevinkr · 31st January 2008, 06:49 PM

Quote:

Originally posted by cbriere
the Zapfilter look good.
I need to build it for myself.
I found the schematics but no par values on it

did someone has builted a clone of the zapfilter?

I was working on something quite similar, but have shelved the project for the time being. (Not enough time in the day.) I might be motivated to resurrect it at some point for my scd-777es project player, but for now its asleep..

Geoff · 31st January 2008, 06:56 PM

Quote:

Originally posted by cbriere
Hawksford....... schematics available?
please post link,,,,,tks

http://www.essex.ac.uk/dces/research...lications.html

cbriere · 31st January 2008, 07:29 PM

I found the schem. of Zapfilter clone,,

Searching for ZAPfilter Mk2 clone.

but,

did anyone had succes with this circuit?

cotdt · 6th December 2008, 05:02 PM

Quote:

Originally posted by cbriere
I found the schem. of Zapfilter clone,,

Searching for ZAPfilter Mk2 clone.

but,

did anyone had succes with this circuit?

It works. It's the exact same as the actual Zapfilter but uses better transistors, so I consider it an improvement.

kimschips · 29th January 2009, 08:02 PM

Hello

I this Thread is very good and interesting learning

I have taken this shuntreg from an old zapfilter (Lcaudio) I know it´s sound very very good, using it in my modified cdplayer.
It gives constant 10V out.

The Shuntreg is supplied like this:
Transformer-> Rectifiers-> serie resistors to set the current flow-> shuntreg -> load

Trans BCP51 take 100mA by it self (sinks)

Can some off you simulate this??
Eks: 15V DC supply, Current to circuits 150mA (100mA BCP51 and 50mA pulled by load.

Kim

30th January 2008, 07:45 PM	#1
cbriere diyAudio Member Join Date: Apr 2005 Location: quebec	looking for All BJT i/v output stage For the PCM1792A, witch is differential. 4 pins : IoutL-, IoutL+, IoutR-, IoutR+ tks

31st January 2008, 04:45 PM	#2
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	You looking to build or looking to buy? LC Audio makes the Zapfilter which will do exactly what you are looking for. __________________ www.kta-hifi.net

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31st January 2008, 06:18 PM	#3
cbriere diyAudio Member Join Date: Apr 2005 Location: quebec	the Zapfilter look good. I need to build it for myself. I found the schematics but no par values on it did someone has builted a clone of the zapfilter?

31st January 2008, 06:22 PM	#4
jwb diyAudio Member Join Date: Mar 2002 Location: San Francisco, USA	Hawksford's scheme uses only BJTs.

31st January 2008, 06:31 PM	#5
cbriere diyAudio Member Join Date: Apr 2005 Location: quebec	Hawksford....... schematics available? please post link,,,,,tks

31st January 2008, 07:29 PM	#8
cbriere diyAudio Member Join Date: Apr 2005 Location: quebec	I found the schem. of Zapfilter clone,, Searching for ZAPfilter Mk2 clone. but, did anyone had succes with this circuit?

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