Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Simplistic NJFET RIAA
Simplistic NJFET RIAA
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 18th December 2012, 11:47 AM   #8851
buzzforb is offline buzzforb  United States
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
gotcha. thanks.
__________________
...Shape the sound , Man!
  Reply With Quote
Old 18th December 2012, 11:54 AM   #8852
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
They dip in the many volts there plus the chokes are in several Henry range. Here it can go off chart. But with a small input cap and a resistor to boost the DCR, the green VC2 output is just a smooth long ramp up/ramp down.
  Reply With Quote
Old 18th December 2012, 12:00 PM   #8853
buzzforb is offline buzzforb  United States
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
I sometimes am too lazy to think about how things actually function, sliding along the surface just building things. Had it working with big 158T, but dropped way too much V, as you said and was pushing its current rating. Ordering two of the hammond transformers and 155B chokes. Will pair with Kg caps that I have. Trying to get brother to bite on Ortofon Vienna cartridge that just went up in Swap No reason why i cant njoy it as well.
__________________
...Shape the sound , Man!

Last edited by buzzforb; 18th December 2012 at 12:02 PM.
  Reply With Quote
Old 18th December 2012, 12:13 PM   #8854
The Space Egg Corp is offline The Space Egg Corp  England
diyAudio Member
 
The Space Egg Corp's Avatar
 
Join Date: Sep 2010
Location: London & Miami
Hi Buzz

Dunno if you got me...
...I think the cored common-mode is a great GREAT idea...BEFORE the transformer...
...AFTER it you wanna air-core, like Capt. Salas says.

Salas...
...your screen-shot shows a CORED inductor.
( just keepin' you sharp Capt. ( wink )).

Cheers.

Si.

PS...Buzz...see if you can borrow a Geiger from the local high-school or somewhere...
...just a quick sweep of the audiophile 1R's when they arrive should ensure peace of mind.
  Reply With Quote
Old 18th December 2012, 12:17 PM   #8855
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
That's what symbol the sim has in its bank. Its about Henry level tube PSUs sims. Still a cored 2A 6mH choke like H155B won't break a bead of sweat at circa 200mA CCS. And its compact.
  Reply With Quote
Old 18th December 2012, 12:21 PM   #8856
buzzforb is offline buzzforb  United States
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Before ordering, what is the advantage of the air core over Hammond in this case. Dont mind getting an air core if it should help sonically.

As for the Fukushima, It is my understanding that the latest versions have an added energy to their sound.
__________________
...Shape the sound , Man!
  Reply With Quote
Old 18th December 2012, 12:23 PM   #8857
RCruz is offline RCruz  Switzerland
nhinstruments
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Simplistic NJFET RIAA
No coils here... not after and not before the TX.

I once experimented with some air coils before the TX (mains filter) and it totally killed the magic.
__________________
RC
  Reply With Quote
Old 18th December 2012, 12:25 PM   #8858
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
Quote:
Originally Posted by buzzforb View Post
Before ordering, what is the advantage of the air core over Hammond in this case. Dont mind getting an air core if it should help sonically.

As for the Fukushima, It is my understanding that the latest versions have an added energy to their sound.
Air core will be more drastic in much higher frequencies than 120Hz.
  Reply With Quote
Old 18th December 2012, 12:25 PM   #8859
buzzforb is offline buzzforb  United States
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
that is a never before heard audio term. I love it
__________________
...Shape the sound , Man!
  Reply With Quote
Old 18th December 2012, 12:26 PM   #8860
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
Quote:
Originally Posted by RCruz View Post
No coils here... not after and not before the TX.

I once experimented with some air coils before the TX (mains filter) and it totally killed the magic.
Was it big coils in value?
  Reply With Quote

Reply


Simplistic NJFET RIAAHide 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

Forum Jump


New To Site? Need Help?

All times are GMT. The time now is 07:39 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki