Balanced PCM1704 PCB - Page 3

tschrama · 14th September 2005, 03:28 PM

I would be interested in a 1704 PCB Jocko! Count me in!

pkpickard · 14th September 2005, 03:35 PM

Guys -

I haven't talked to him recently, but David Broadhurst developed a balanced 1704 DAC with a FIFO buffer front end and a discrete JFET output stage. Never published on the web, to my knowledge. If someone was willing to do the legwork for him, he might be willing to publish it (or allow someone else to produce the PCBs with some consideration to him.) It's done, and it's a great design. Just a thought.

Paul

Cobra2 · 14th September 2005, 03:38 PM

me tooooo...

Arne K

carlmart · 14th September 2005, 04:02 PM

Quote:

Originally posted by pkpickard

I haven't talked to him recently, but David Broadhurst developed a balanced 1704 DAC with a FIFO buffer front end and a discrete JFET output stage. Never published on the web, to my knowledge. If someone was willing to do the legwork for him, he might be willing to publish it (or allow someone else to produce the PCBs with some consideration to him.) It's done, and it's a great design. Just a thought.

Interesting. Some days ago I did a search looking for some way to see his designs but the URLs seemed to be down.

It would be great to have an affordable option for a 1704 based design.

Carlos

Cobra2 · 14th September 2005, 04:18 PM

I have one of these...:
http://www.diyaudio.com/forums/showt...658#post126658
-never had the time (or interest for SMD-parts)...

trade?

Arne K

carlmart · 14th September 2005, 05:02 PM

Quote:

Originally posted by Cobra2
I have one of these...:
http://www.diyaudio.com/forums/showt...658#post126658
-never had the time (or interest for SMD-parts)...

But those parts ARE SMD!!!...

Carlos

Jocko Homo · 14th September 2005, 05:29 PM

Yes, Arne.......I know you would like one.

But:

You are going to raise the cost of each channel by around $40, just to enrich TI. (Someone on another forum actually accused me of working for them!) And what do you get for $40/channel?

Well, 3 dB increase in S/R ratio. Is it worth it? The low-level linearity of those chips isn't as good as I would like. Why spend $80+ in the unlikely event that some of that will also cancel out.

Nope........for my money, I would rather make differential I/V thingie. Yeah, I know..........everyone is waiting on me to come up with one. When I have the need for one in my system, it will happen. Not before then.

Jocko

A 8 · 14th September 2005, 07:37 PM

Quote:

Originally posted by Cobra2
I have one of these...:
http://www.diyaudio.com/forums/showt...658#post126658
-never had the time (or interest for SMD-parts)...

trade?

Arne K

Arne,
Would you sell it?

Jocko,
I would also buy yours if you made one.

R/Michael

chris719 · 15th September 2005, 01:08 AM

I'd be interested in a PCM1704 PCB with 1 DAC per channel

.

jleaman · 15th September 2005, 05:51 AM

Quote:

Originally posted by chris719
I'd be interested in a PCM1704 PCB with 1 DAC per channel .

Price..?

Maybe me too....

14th September 2005, 03:35 PM	#22
pkpickard diyAudio Member Join Date: Sep 2002 Location: Atlanta, GA	Try David Broadhurst (1704 balanced DAC) Guys - I haven't talked to him recently, but David Broadhurst developed a balanced 1704 DAC with a FIFO buffer front end and a discrete JFET output stage. Never published on the web, to my knowledge. If someone was willing to do the legwork for him, he might be willing to publish it (or allow someone else to produce the PCBs with some consideration to him.) It's done, and it's a great design. Just a thought. Paul

14th September 2005, 03:38 PM	#23
Cobra2 DIY ! diyAudio Member Join Date: Apr 2002 Location: Stavanger, Norway	yes, Jocko ... me tooooo... Arne K __________________ Ars longa, vita brevis

14th September 2005, 04:18 PM	#25
Cobra2 DIY ! diyAudio Member Join Date: Apr 2002 Location: Stavanger, Norway	BTW... I have one of these...: http://www.diyaudio.com/forums/showt...658#post126658 -never had the time (or interest for SMD-parts)... trade? Arne K __________________ Ars longa, vita brevis

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14th September 2005, 03:28 PM	#21
tschrama diyAudio Member Join Date: Jul 2001 Location: The Netherlands	I would be interested in a 1704 PCB Jocko! Count me in!

14th September 2005, 05:29 PM	#27
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	Yes, Arne.......I know you would like one. But: You are going to raise the cost of each channel by around $40, just to enrich TI. (Someone on another forum actually accused me of working for them!) And what do you get for $40/channel? Well, 3 dB increase in S/R ratio. Is it worth it? The low-level linearity of those chips isn't as good as I would like. Why spend $80+ in the unlikely event that some of that will also cancel out. Nope........for my money, I would rather make differential I/V thingie. Yeah, I know..........everyone is waiting on me to come up with one. When I have the need for one in my system, it will happen. Not before then. Jocko

15th September 2005, 01:08 AM	#29
chris719 diyAudio Member Join Date: Jun 2004 Location: Connecticut	I'd be interested in a PCM1704 PCB with 1 DAC per channel .

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