Need input on Buffer stage to use in Preamp.. - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 July 2010, 09:45 PM   #1
diyAudio Member
 
Join Date: Jan 2009
Send a message via MSN to Adrculda Send a message via Yahoo to Adrculda
Default Need input on Buffer stage to use in Preamp..

Hey guys...
I'm well under way on a amp build im working on currently and would like to slowly start gathering parts for the matching preamp.
starting with the output, i would like to have a selectable output configuration and want to incorporate a tube buffer or preamp stage on one output and a HDAM preamp on the other.

Theres a lot of EBAY kits and im not to tube "savy" so i figgure before i start burning money is always worth asking which one is worth it and what to look for


The reason why i want to incorporate a tube section is because i had to replace a board and a few items on a friends Dynaco PAS2 and after had it for a "burn in" for 2 weeks it sounded amazing to me, hence why i want to add one to my build

ALSO, balanced signal handling would be a BONUS !!!

Input needed on this kit to start off with...
  Reply With Quote
Old 19th July 2010, 09:48 PM   #2
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
drek - short and simple

if you need tube buffer - SLCF , Allen Wright , google

edit : for 143$ ........ better use much smaller money , and buy tube preamp cookbook and supercable cookbook from mentioned tube wakoo ...... that way you'll learn something ..... and never ever think again about buying audiophool fog on ebay
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM

Last edited by Zen Mod; 19th July 2010 at 09:52 PM.
  Reply With Quote
Old 20th July 2010, 01:21 AM   #3
diyAudio Member
 
Join Date: Jun 2004
Location: Indiana
I must expose my ignorance. What is an HDAM? A full fledged tube line amp is so simple I often wonder why a buffer on something else has so much appeal.
__________________
If We The People refuse to hear the truth we will be ruled by liars.
  Reply With Quote
Old 20th July 2010, 06:54 AM   #4
diyAudio Member
 
Join Date: Jan 2009
Send a message via MSN to Adrculda Send a message via Yahoo to Adrculda
HDAM Module is basicly a high end audio opamp built from scratch with audiophile components.

HDAM Module Review by HeadFi.org

URL at the end of the Review was supposed to Point HERE

Last edited by Adrculda; 20th July 2010 at 06:59 AM.
  Reply With Quote
Old 20th July 2010, 07:11 AM   #5
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Quote:
Originally Posted by mashaffer View Post
I must expose my ignorance. What is an HDAM? A full fledged tube line amp is so simple I often wonder why a buffer on something else has so much appeal.
It is from another reality, where conductivity is measured in RaMaOhms between Chakras.
__________________
"Our youth [...] have bad manners, contempt for authority; they show disrespect for their elders, contradict their parents, [...] and tyrannize their teachers. -- Plato, 447-367 BCE
  Reply With Quote
Old 20th July 2010, 08:30 PM   #6
diyAudio Member
 
Join Date: Jun 2004
Location: Indiana
Quote:
Originally Posted by Wavebourn View Post
It is from another reality, where conductivity is measured in RaMaOhms between Chakras.


Oddly I had to look up Chakra too.
__________________
If We The People refuse to hear the truth we will be ruled by liars.
  Reply With Quote
Old 1st August 2010, 07:59 PM   #7
diyAudio Member
 
Join Date: Jan 2009
Send a message via MSN to Adrculda Send a message via Yahoo to Adrculda
hmmm...

i know its ebay again...
Jadis JP-200 JP200 Tube Pre Amplifier
but like i said earlier, i just want a PCB to make my life easy !!!

Given if i buy 2 boards can i use them to "buffer" balanced signals ??

And what benefits would a tube regulated supply give ???
  Reply With Quote
Old 1st August 2010, 10:33 PM   #8
Arnulf is offline Arnulf  Europe
diyAudio Member
 
Join Date: Feb 2009
Well, you could ... I just wonder why you'd need this horribly inefficient use of ECC83s doing double duty WITH 2000+x GAIN functioning as a buffer. Do you plan to put an attenuator somewhere that will quiet this thing down two thousand plus times ?

Oh and ECC83 doesn't make the best cathode follower out there, no matter what the schematic in your link says.
__________________
mod verb, transitive /mod/ to state that one is utterly clueless about the operation of device to be "modded" and into "fixing" things that are not broken; "My new amplifier sounds great so I want to mod it."
  Reply With Quote
Old 1st August 2010, 11:25 PM   #9
diyAudio Member
 
Join Date: Jan 2009
Send a message via MSN to Adrculda Send a message via Yahoo to Adrculda
Basicly what I'm doing is building a Pre-amp to my own needs and wants....

Will include basic functions as Volume and Source Select - 4 XLR pairs, 2 TRS Pairs and 5 RCA Pairs with a "Monitor" Function. This will allow the use of a external processor or DSP and will have 1 pair of XLR's and TRS's . All unbalanced signals will be up-converted to Balanced Signal and handled internally in the balanced form. Output will be Balanced ( XLR and TRS ) and will also include a summing amp to have a pair of RCA's.

The Output Section will be selectable as either tube to HDAM modules with JFET's
Still debating if i want to incorporate a DSP board for time correction with a Graphic or Parametric EQ, but will have a Bypass for "source direct" mode.

For the Tube Section I'm looking to find a PCB that i can populate on my own and dont have to go through the trouble of trying to do a complete layout.


The whole idea of this preamp is to have a clean, accurate and detailed sound with best of both "worlds" tube and analog.
Maybe eventually will add a digital output section as well... maybe...

Last edited by Adrculda; 1st August 2010 at 11:42 PM.
  Reply With Quote
Old 1st August 2010, 11:35 PM   #10
diyAudio Member
 
Join Date: Jan 2009
Send a message via MSN to Adrculda Send a message via Yahoo to Adrculda
Here's a small list of all the tube boards DIY Audio Kit offers...

Marantz 7C 7-C Tube Pre Amp

Tube Pre amplifer PCB, Based on McIntosh C-22

Matisse Fantasy Pre-Amp

6SN7 SRPP Tube Pre Amplifier PCB


6N3 (5670) Tube Buffer


Another vendor - 8 Audio has a few too...

Upgraded design for Mcintosh C22

Upgraded Design from Marantz 7

Upgraded design for ARC SP10

Upgrade design for C.J. PV-12

Upgraded design for Cary SLP90


Upgraded design for Jadis JP200



Input please !!

Last edited by Adrculda; 1st August 2010 at 11:53 PM. Reason: Added a few more to the list of options...
  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
MC preamp input stage (BJT based) questions jason12 Analogue Source 5 5th May 2010 05:12 PM
Preamp schema: Input to buffer to potentiometer to gainstage or what? Groundloops Solid State 9 8th February 2008 11:29 AM
connecting input directly to ucd, no input buffer mazurek Class D 20 19th July 2006 03:32 PM
what do you think of my input buffer stage mazurek Parts 6 6th April 2006 03:03 PM
Has anyone tried a low input capacitance MOSFET in a line stage preamp MIKET Pass Labs 2 27th August 2003 08:29 PM


New To Site? Need Help?

All times are GMT. The time now is 12:07 AM.


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