#26 pre amp - Page 161 - 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 11th February 2012, 03:49 PM   #1601
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Main difference of just VR tubes and a reg after the noise (plate side) is under a threshold -and this is a low gain line level stage after all, easy to tackle that noise aspect, not a phono- is the dynamic impedance. VR is just a stabilizer, the particular regulator has an error amplifier of 1000 times gain. A much better source, impedance-wise. You will have to evaluate after experiencing both alone, or in combination. I also find excess regulation gain stiffening tone up, but no gain too loose also. Tried for not spoiling the tone, just adding benefits. In the beta testing feedback round the first ''victim'' was a #26, second one was a C3G phones device, both transformer output. Independent feedback was heartening. Specs and subjective evaluations had been taken into account in a hopefully good mix and balance. Not easy to improve ''likes'' on the widely used SSHV1, it took some modesty, team testing, time and care. Wishing success with your experiments.
  Reply With Quote
Old 11th February 2012, 03:56 PM   #1602
diyAudio Member
 
Join Date: Nov 2002
In easier to understand english what did you just say?
  Reply With Quote
Old 11th February 2012, 04:01 PM   #1603
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
VR VS regulator may not be choosing on noise grounds but on other sonic aspects for you.
  Reply With Quote
Old 11th February 2012, 04:27 PM   #1604
diyAudio Member
 
Join Date: Jan 2007
Location: The 1st State
Im still following this with great interest; and cannot wait to hear how things work out for Magz and Burnedfingers.
Right now Im faithfully replicating Kevin's PSU schema...And we'll see how I like it. If I decide to do something different, I'll still have a 300v tranny and a GZ37 to start with. Considering the high voltage, VR tubes and the Salas board will be the next logical option to get my B+ down.
  Reply With Quote
Old 11th February 2012, 04:41 PM   #1605
vgeorge is offline vgeorge  Greece
diyAudio Member
 
vgeorge's Avatar
 
Join Date: Mar 2004
Location: poros island
If you go with choke input you will be around 240V. Then SSHV2 with heavy heat sinking will be enough.
__________________
"Without deviations from the norm, progress is not possible" - Frank Zappa
  Reply With Quote
Old 11th February 2012, 04:55 PM   #1606
massimo is offline massimo  Italy
diyAudio Member
 
Join Date: Dec 2002
Location: Milan, Italy
Quote:
Originally Posted by Salas View Post
...second one was a C3G phones device ... transformer output.
Any chance to see a schem one day or another?
  Reply With Quote
Old 11th February 2012, 04:56 PM   #1607
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Ask Stixx in the SSHV thread.
  Reply With Quote
Old 11th February 2012, 05:03 PM   #1608
diyAudio Member
 
Join Date: Jan 2007
Location: The 1st State
Quote:
Originally Posted by vgeorge View Post
If you go with choke input you will be around 240V. Then SSHV2 with heavy heat sinking will be enough.
Thanks. I'll have to study the documentation to see how much Vdrop it can do.
  Reply With Quote
Old 11th February 2012, 05:07 PM   #1609
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Pq1=(Vin-Vo)*CCS. Max practical Q1 board level sink is around 3.8C/W.
  Reply With Quote
Old 11th February 2012, 05:19 PM   #1610
vgeorge is offline vgeorge  Greece
diyAudio Member
 
vgeorge's Avatar
 
Join Date: Mar 2004
Location: poros island
Quote:
Originally Posted by Steven-H View Post
Thanks. I'll have to study the documentation to see how much Vdrop it can do.
If you do a LCRC filter you can get a few more volts drop and a little bit better pre filtering. A 1k 5W resistor will drop 40 volts at 40mA.
__________________
"Without deviations from the norm, progress is not possible" - Frank Zappa
  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



New To Site? Need Help?

All times are GMT. The time now is 12:13 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