High quality input and V.A. stage buy - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 September 2009, 09:20 PM   #1
diyAudio Member
 
raidfibre's Avatar
 
Join Date: Jan 2003
Location: Boston, MA, USA
Send a message via AIM to raidfibre
Default High quality input and V.A. stage buy

Hi there!

I just captured a schematic for an: "Ultrahigh performance input stage and VA stage combination." out of a well-known power amplifier design book. The original designer of this circuit is Randy Slone*

It is an input stage and voltage amplifier stage designed for operation at +/-50v rails. You can run it at higher or lower voltages with some adjustments.

The schematic consists of two complementary differential input and darlington voltage-amplifier stages including current limiting, two-pole compensation, and cascode loading.

If you're building a single channel amplifier you would need one of these boards, some sort of input switcher/"preamp", and a power output stage. If you're not sure what this means, it's probably not for you!

All I'm asking for right now is if anyone is interested in this. If there is significant interest I will re-lay the board for 4 layers so that I can use a full ground plane.

The board is not a cram-job and I tried to use minimal vias for signals. If I can get interest for a 4 layer design, there will probably be no vias for signals (just for tapping onto pwr/gnd layers)

(most of) the transistors are SOT-23 and most of the resistors 0805 size. I will probably offer a parts kit.

The two-layer board is about 10 square inches (2.75 * 3.65)

The initial cost is $12.

I'd like to gauge interest at this point.

---
* I believe this is fair use because the author of the book is no longer selling kits or boards, I've created my own artwork, the only company selling kits is in
Australia and it doesn't even look like they're actually selling anything like this board. I'm not going to make any profit.
---
Attached Images
File Type: png board_comp.png (31.0 KB, 68 views)
Attached Files
File Type: pdf input_va.pdf (35.3 KB, 19 views)
__________________
--
Martin K
  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
2 or 4-channel amp with thru hole pcb and high quality output stage? geom_tol Car Audio 0 8th July 2007 04:41 AM
Low wattage, high efficiency, high quality? Nordic Multi-Way 5 4th September 2005 11:12 PM
current bias j-fet input 2sk170 ,2sj74 at input stage YUTK Solid State 11 2nd June 2005 03:34 AM
High Power High Quality Digital Amp aspycaudio Digital Source 0 6th December 2003 09:49 AM
Your input/suggestions for high-quality terminal cup? maxxx Parts 6 16th June 2003 04:53 AM


New To Site? Need Help?

All times are GMT. The time now is 03:15 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