Super Audiophile Phono-Stage - Battery Powered - Page 2 - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th May 2008, 08:45 AM   #11
diyAudio Member
 
Join Date: Nov 2007
Quote:
Originally posted by despotic931


Ahh, the reason I ask is that I was considering purchasing a phonobox and then building a new power supply for it, But didn't want to take the battery powered route.



Batteries are a continual cost, something that will be a continual drain of my funds. These are funds that are short already, and I know these batteries are quite costly. I don't doubt that it doesn't sound way better than the stock psu, but I also believe that you could build a custom psu that would be much better as well.

-Justin
Justin

I do suppose one can build a quite fancy PSU for these phonostages that will equal battery performance. Try it.

Like I said - I have the batteries at my disposal so that is why I used them.

D
  Reply With Quote
Old 28th May 2008, 11:45 AM   #12
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Sofia
Quote:
Originally posted by tubenut
Battery drawback?

Other then "green issues", dynamics for one imo/experience.
Different batteries also sound different btw...


Greetings G

Green issues?! Getting ready to move back to Europe? The only mass recycling in SA afaik is the result of theft.

I spent about five years listening to batteries: tube MC step-up and a 3-stage split passive opamp RIAA, each stage powered by a separate set of batteries.

Indeed different batteries sound surpisingly (or not) different. I liked a particular NiCd brand of around 300mA/h. When it became obsolete i never managed to find a suitable replacement. Acid batteries sound completely different of course.

These days i use ALW superregs in almost anything i build. They sound very good but not quite as good as batteries.

If one wants to compare batteries and mains supplies there is no better place IMO than a MC step-up.
  Reply With Quote
Old 28th May 2008, 01:09 PM   #13
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
What about a super regulator fed from a battery? I'll belive that batteries creates some noise due to the chemistry.
__________________
/Per-Anders (my first name) or P-A as my friends call me
  Reply With Quote
Old 28th May 2008, 01:46 PM   #14
diyAudio Member
 
Onvinyl's Avatar
 
Join Date: Aug 2002
Location: Germany
Quote:
Originally posted by analog_sa




These days i use ALW superregs in almost anything i build. They sound very good but not quite as good as batteries.


Quite the opposite to my findings. To me, a supperegged PSU sounds (a lot) better then the acid batteries I had before and the NiMH I tried in my phonoclone.

regards,
Rüdiger
__________________
"I can feel what's going on inside a piece of electronic equipment. I have a sense that I know what's going on inside the transistors." Robert Moog
  Reply With Quote
Old 28th May 2008, 03:54 PM   #15
diyAudio Member
 
Join Date: Nov 2007
This is what I actually did...

Beachwood face with 3mm green LED.
Click the image to open in full size.

Rubber grommet from a Neutrik XLR plug and some Nylon braid.
Click the image to open in full size.

DC connected!
Click the image to open in full size.

D
  Reply With Quote
Old 28th May 2008, 04:32 PM   #16
BC is offline BC  United States
diyAudio Member
 
Join Date: Jan 2004
Location: Milwaukee,Wisconsin-USA
Quote:
Originally posted by GlidingDutchman
This is what I actually did...

Beachwood face with 3mm green LED.
Click the image to open in full size.

Rubber grommet from a Neutrik XLR plug and some Nylon braid.
Click the image to open in full size.

DC connected!
Click the image to open in full size.

D
Hello All,
I realize the main topic is battery power, however..

I might possibly suggest to also replace the JRC2068/NJM2068 OpAmp with TI, NatSemi very low noise/faster? dual OpAmps.


(If I am reading the part correctly in the bottom photo; U4)

Possibly replace some of the ceramic caps with Poly/Styrene/Silvered Mica?

__________________
Everything is relative to something. A key to communication is agreeing on a reference point.
  Reply With Quote
Old 28th May 2008, 04:43 PM   #17
diyAudio Member
 
Join Date: Nov 2007
Quote:
Originally posted by BC


Hello All,
I realize the main topic is battery power, however..

I might possibly suggest to also replace the JRC2068/NJM2068 OpAmp with TI, NatSemi very low noise/faster? dual OpAmps.

(If I am reading the part correctly in the bottom photo)

Possibly replace some of the ceramic caps with Poly/Styrene/Silvered Mica?

BC

It can surely be done... I just have to find the time and funds...

D
  Reply With Quote
Old 28th May 2008, 05:29 PM   #18
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Sofia
Quote:
Originally posted by Onvinyl



Quite the opposite to my findings. To me, a supperegged PSU sounds (a lot) better then the acid batteries I had before and the NiMH I tried in my phonoclone.

regards,
Rüdiger

It's not quite the "opposite". The superregs are very nice indeed and batteries vary to a surprising extent - one of the reasons i gave up on using them. Acids sound a bit slow and lacking PRAT; NiMH i used quite recently (5 years ago - from Nokia 5110 batteries in a 2SK170 MC step-up) and they were really not bad.
  Reply With Quote
Old 28th May 2008, 05:47 PM   #19
diyAudio Member
 
Onvinyl's Avatar
 
Join Date: Aug 2002
Location: Germany
Hi analog_sa,
I second your sonic classification of lead acid batteries. NiMH are a lot better. But a superreg psu has the additional 'kick' -- and a very tiny bit of uneasiness. Mabye the open loop shunt regs I'm now using combine the best of both worlds -- but they are subjectivly so good I was too lazy to acutally check against NiMH's and superregs for now...

but to an extent it's all a matter of taste...

Rüdiger
__________________
"I can feel what's going on inside a piece of electronic equipment. I have a sense that I know what's going on inside the transistors." Robert Moog
  Reply With Quote
Old 28th May 2008, 05:50 PM   #20
tubenut is offline tubenut  South Africa
diyAudio Member
 
tubenut's Avatar
 
Join Date: Nov 2002
Location: South Africa, Jhb
Glide, looking at the pics it seems you connected DC in the pads left by the diodes?

That means you are feeding 15V regulators 12V, this would not work properly and they would certainly be starved. It probably works though because for some bizarre reason project bypassed the regulator inputs to outputs with some resistors of a few hundred ohms though I know not why...

You may wish to remove the badly behaving starving regulators all together, or replace them with types that are at least 3V below your battery voltage, or up the battery voltage to at least 3V above the 15V regulators.

Or at least, remove the resistors and feed directly to the OP amp PSU pins through the pads left by the resistors. Leaving the regs out of circuit. This would loose the miserable small smoothing caps though.

Those teeny regulators starve the poor stage anyway, I replaced them with a little dexterity with TO220 versions and got rid of all the ceramics in the RIAA.

Rolling op amps can be fun and fustrating, like some cables and tubes.


@PK, no but since the advent of Croaky/ lill tubenutty I see a lot more batteries coming through my house before becoming landfill, there is guilt with that and our urban explosion just means that soon those dumps will be nearer some folks houses then ever, even in big old Africa!
__________________
Guillaume
Croak Audio Exploration
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery powered op-amp analogue stage of DAC wreeve Digital Source 5 23rd August 2005 08:43 PM
Should I replace Scott 222C phono stage with Claret phono stage? Bing Yang Analogue Source 0 22nd August 2005 07:41 AM
Battery powered phono. GeirW Tubes / Valves 6 4th December 2004 08:40 PM
Battery powered Balance Line Stage icceman Pass Labs 10 26th December 2003 02:35 AM
pearl Phono stage battery option schatz Pass Labs 1 12th February 2002 04:04 AM


New To Site? Need Help?

All times are GMT. The time now is 05:41 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2