Interesting idea to make MM carts sound better... - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, 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 19th October 2005, 06:26 AM   #1
diyAudio Member
 
Join Date: Jun 2005
Location: Minnesota, USA
Default Interesting idea to make MM carts sound better...

I just saw this article over at Audio Asylum. The idea is certainly novel, but the article doesn't go into any details on how its implimented besides saying that a second, identical cartridge (to the one being used as the input) is installed in the feedback loop of the opamp in the circuit. I'm very intrigued, but I don't really know much about electronics. Anyone have any ideas on how this could be implimented? I'd love to try it.
  Reply With Quote
Old 19th October 2005, 07:41 PM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
seems like the first flat stage gain block is replaced with this complex feedback gain block. Then the really flat signal is sent on for RIAA processing and out comes another flat signal. More majic or are all my flats getting jumbled?
__________________
regards Andrew T.
  Reply With Quote
Old 19th October 2005, 07:50 PM   #3
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Very interesting. Besides a handful of functional Grados i have even more without stylus. Who wants to do the experiment?

My one viist to Paul & Stan's Santa Maria facility was VERY interesting....

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 19th October 2005, 11:10 PM   #4
diyAudio Member
 
Join Date: Jan 2003
Location: LA
Default Re: Interesting idea to make MM carts sound better...

Quote:
Originally posted by Mr.Radar
I just saw this article over at Audio Asylum. The idea is certainly novel, but the article doesn't go into any details on how its implimented besides saying that a second, identical cartridge (to the one being used as the input) is installed in the feedback loop of the opamp in the circuit. I'm very intrigued, but I don't really know much about electronics. Anyone have any ideas on how this could be implimented? I'd love to try it.
Hey, that was my post at AA (and my blogger page) .
So far, not much response at AA.
My engineering knowledge is limited to ones and zeros, so I am not sure how to implement it, that's why I asked the question at AA, to see if anybody over there would pick it up.
Too bad I can't get a hold of Stan on the phone anymore, he would be able to tell me how to implement it.

Randy
__________________
My system is here
http://randytsuch-audio.blogspot.com/2005/10/my-system.html
  Reply With Quote
Old 20th October 2005, 06:52 AM   #5
diyAudio Member
 
Join Date: Jun 2005
Location: Minnesota, USA
Default Re: Re: Interesting idea to make MM carts sound better...

Quote:
Originally posted by randytsuch


Hey, that was my post at AA (and my blogger page) .
So far, not much response at AA.
My engineering knowledge is limited to ones and zeros, so I am not sure how to implement it, that's why I asked the question at AA, to see if anybody over there would pick it up.
Too bad I can't get a hold of Stan on the phone anymore, he would be able to tell me how to implement it.

Randy

When I saw the thread at AA I immediately thought of this forum (if there's anyone out there who could figure this circuit out, they're probably here). Like you, I know hardly anything about analog electronics (my favorite form of DIY'ing is writing computer programs (if you consider that DIY'ing...), and recently PICs have piqued my interest (no pun intended), but I haven't gotten around to actually doing anything with them yet).
  Reply With Quote
Old 20th October 2005, 06:54 AM   #6
maxro is offline maxro  Canada
diyAudio Member
 
maxro's Avatar
 
Join Date: Dec 2004
Location: Survey says: Least happiest city in Canada
Quote:
Originally posted by AndrewT
Hi,
seems like the first flat stage gain block is replaced with this complex feedback gain block. Then the really flat signal is sent on for RIAA processing and out comes another flat signal. More majic or are all my flats getting jumbled?

Or, (possible stupid question) does the second cartridge do the RIAA correction for you?

Max
  Reply With Quote
Old 20th October 2005, 07:19 AM   #7
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally posted by maxro
Or, (possible stupid question) does the second cartridge do the RIAA correction for you?
No. The cartridge doesn't know anything about the RIAA -- it is embedded on the record.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 20th October 2005, 07:32 AM   #8
maxro is offline maxro  Canada
diyAudio Member
 
maxro's Avatar
 
Join Date: Dec 2004
Location: Survey says: Least happiest city in Canada
Quote:
Originally posted by planet10


No. The cartridge doesn't know anything about the RIAA -- it is embedded on the record.

dave

Right, right. What was I thinking? It must be time for bed.

Max
  Reply With Quote
Old 20th October 2005, 06:32 PM   #9
diyAudio Member
 
Join Date: Feb 2004
Location: utrecht
Default inverted model

A very intriguing article. I should not have dumped my 30 year old multivariable control theory textbooks.

My first hunch was that you need an inverted model (system) to nill the anomalies.

Inverting not meaning that it is laying on its back??.

I would not have a clue anymore whether putting the (original) (model) in the feedbackloop would have the same effect. This will give some restless sleep.

E&E
  Reply With Quote
Old 20th October 2005, 07:08 PM   #10
Nanook is offline Nanook  Canada
diyAudio Member
 
Nanook's Avatar
 
Join Date: Feb 2004
Location: Chinook Country.Alberta
Default inverted signal for "grado/PS Audio" tweal

2 thinks strike me about this...

how easy it would be to implement for any cartridge.... and how easy it could ocur if your phono stage has a pair of inverted inputs..

As the owner of a wonderful sounding PS Audio lll phono stage, I'm gonna pop the hood and have a peak inside.. oir hunt down the owners manual/schematic if I still have it:-)
__________________
stew -"A sane man in an insane world appears insane."
  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
interesting idea :D h3ad Chip Amps 15 7th December 2007 02:05 AM
Interesting Pro idea based on 6ND430 Zero Cool PA Systems 8 21st May 2007 11:53 AM
interesting idea from car-audio theChris Solid State 3 25th July 2006 04:42 PM
Interesting enclosure idea: GrahamnDodder Chip Amps 1 21st October 2003 08:23 PM


New To Site? Need Help?

All times are GMT. The time now is 08:02 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