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

Group Buys Members group buys

Simple High Performance DC Coupled Class A HPA with sub PPM THD
Simple High Performance DC Coupled Class A HPA with sub PPM THD
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 29th June 2018, 04:34 PM   #91
JPS64 is offline JPS64  Germany
diyAudio Member
 
Join Date: May 2011
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Hi X,


prefering this one: Mayitr 8 stucke Rot + Weiss RCA Buchse Chassis Hohe Qualitat RCA CMC Buchse Phono Kupfer Stecker Amp HiFi in Mayitr 8 stucke Rot + Weiss RCA Buchse Chassis Hohe Qualitat RCA CMC Buchse Phono Kupfer Stecker Amp HiFi aus Anschlusse auf AliExpress.com | Alibaba Group


Finishing the preamplifier version, starting headphone version using your enclosure.


JP
Attached Images
File Type: jpg TimS-PREAMP_closed.jpg (241.9 KB, 392 views)
File Type: png TimS-PREAMP_rear.png (478.3 KB, 2025 views)
File Type: jpg TimS-PREAMP_open.jpg (315.8 KB, 2025 views)
  Reply With Quote
Old 29th June 2018, 05:57 PM   #92
ravid is offline ravid  India
diyAudio Member
 
Join Date: Feb 2011
Badboygolf16v - 1 pair
Dabore84 - 2 pair
funch - 1 pair
kartk - 1 pair
Yourownbuzz - 1 pair
BabyDontHertzMe - 1 pair
Stellarelephant - 1 pair
passive420 - 1 pair
Pinnocchio - 1 pair
vvs7 - 2 pairs
Gwrskien - 1 pair
Ernesternest - 1 pair
jwjarch - 1 pair
ermine22 - 2 pairs
Morde - 1 pair
S610adam - 2 pair
pstech - 2 pair
Silasmellor - 1 pair
ravid - 1 pair
  Reply With Quote
Old 29th June 2018, 09:19 PM   #93
JPS64 is offline JPS64  Germany
diyAudio Member
 
Join Date: May 2011
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Itīs all for today.


Some corrections and modifications to do...


JP
Attached Images
File Type: png X-HPA_FRONT.png (263.4 KB, 362 views)
File Type: png X-HPA_TOP_OPEN.png (658.3 KB, 356 views)
  Reply With Quote
Old 29th June 2018, 10:32 PM   #94
JPS64 is offline JPS64  Germany
diyAudio Member
 
Join Date: May 2011
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Last ones for today...


JP
Attached Images
File Type: png X-HPA_FRONT_CLOSED_2.png (384.0 KB, 78 views)
File Type: png X-HPA_FRONT_2.png (609.0 KB, 1890 views)
File Type: png X-HPA_REAR_CLOSED_2.png (276.7 KB, 1856 views)
File Type: png X-HPA_TOP_OPEN_2.png (403.9 KB, 70 views)
  Reply With Quote
Old 30th June 2018, 02:22 AM   #95
xrk971 is online now xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Wow, that looks beautiful, JP!

Here is the case from Aliexpress that you modeled in 3D.
PH I Headphone Amplifier All aluminum Chassis Preamplifier Enclosure Mini Case DIY Box-in Speaker Accessories from Consumer Electronics on Aliexpress.com | Alibaba Group
Attached Images
File Type: jpg D6231F7F-95FB-467A-BD15-FCF06EF9C3B2.jpg (442.5 KB, 93 views)
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote
Old 3rd July 2018, 04:45 AM   #96
xrk971 is online now xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Default Simple Class HPA and Preamp Production Data

Many thanks to JPS64 for his untiring efforts to produce a magnificent set of professionally-done layouts and uniquely flexible design for either a HPA or a Preamp.

Here is a block diagram showing how the single panel with 8 sub-boards can be mixed and matched to produce either a HPA or a Preamp with multiple input selector jack:
Simple High Performance DC Coupled Class A HPA with sub PPM THD-simple-hpa-block-diagram-png

The panel includes following boards:
  • input and source switch board (only preamplifier version)
  • crossfeed board (with defeat Xfeed ON/OFF switch)
  • headphone jack output board (6.35mm stere TRS output jack)
  • volume potentiometer board (with the possibility of three different types of pots)
  • PSU (includes CLC, DC-DC dual rail step up, cap Mx, CRCRC filter to produce battery-like rails from simple 12v wall-wart)
  • CLC filter board (in case you want to use your own PSU)
  • ON/OFF switch board
  • amplifier board

For the preamplifier version, the following boards are not used: the crossfeed, headphone jack output board, and volume potentiometer.

For the preamplifier version, use the potentiometer built-into the main amp board; for the headphone version, use the separate volume potentiometer board.

Of course, you could use the external volume pot board for the preamp if you wish. The panel offers a wide range of possibilities.

Here are 3d renders:
Simple High Performance DC Coupled Class A HPA with sub PPM THD-shpa-pba-top-2-jpg

Simple High Performance DC Coupled Class A HPA with sub PPM THD-shpa-pba-bot-2-jpg

Simple High Performance DC Coupled Class A HPA with sub PPM THD-shpa-pcb-top-2-jpg

Simple High Performance DC Coupled Class A HPA with sub PPM THD-shpa-pcb-bot-2-jpg

The detailed schematics and stuffing guides are attached below as PDF's.

Comments/feedback welcome. If no more changes we can move to actual GB and I will start collecting payments via PayPal invoices.

The PCB's will be 2mm thick, with 2oz copper and gold ENIG finish and blue solder mask as depicted in renders.

Cost will be $28/panel (a stereo "set" as terminology was used when we originally thought we were using separate mono boards).

Shipping costs will be $5 in USA, $10 for Canada, and $15 everywhere else.
Attached Images
File Type: png Simple-HPA-Block-Diagram.png (63.2 KB, 2002 views)
File Type: jpg SHPA-PBA-TOP-2.jpg (298.0 KB, 2509 views)
File Type: jpg SHPA-PBA-BOT-2.jpg (380.2 KB, 2373 views)
File Type: jpg SHPA-PCB-TOP-2.jpg (351.4 KB, 930 views)
File Type: jpg SHPA-PCB-BOT-2.jpg (366.1 KB, 383 views)
Attached Files
File Type: pdf SHPA-PBA-TOP.pdf (110.0 KB, 52 views)
File Type: pdf SHPA-PBA-BOT.pdf (102.7 KB, 46 views)
File Type: pdf SHPA-SCH_001_page1.pdf (112.0 KB, 98 views)
File Type: pdf SHPA-SCH_001_page2_to_page4.pdf (111.5 KB, 81 views)
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio

Last edited by xrk971; 3rd July 2018 at 05:03 AM.
  Reply With Quote
Old 3rd July 2018, 05:17 AM   #97
jwjarch is offline jwjarch  United States
diyAudio Member
 
jwjarch's Avatar
 
Join Date: Mar 2017
Location: San Leandro, CA
Wow! VERY nice JP and X! Can't wait to get my hands on this one. Any update on the status of the voltage regulator boards?
  Reply With Quote
Old 3rd July 2018, 05:21 AM   #98
xrk971 is online now xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Simple HPA GB List:

Quote:
Badboygolf16v - 1 set
Dabore84 - 2 sets
funch - 1 set
kartk - 1 set
Yourownbuzz - 1 set
BabyDontHertzMe - 1 set
Stellarelephant - 1 set
passive420 - 1 set
Pinnocchio - 1 set
vvs7 - 2 sets
Gwrskien - 1 set
Ernesternest - 1 set
jwjarch - 1 set
ermine22 - 2 sets
Morde - 1 set
S610adam - 2 sets
pstech - 2 sets
Silasmellor - 1 set
ravid - 1 set
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote
Old 3rd July 2018, 05:40 AM   #99
xrk971 is online now xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Simple High Performance DC Coupled Class A HPA with sub PPM THD
Quote:
Originally Posted by jwjarch View Post
Wow! VERY nice JP and X! Can't wait to get my hands on this one. Any update on the status of the voltage regulator boards?
In a pinch, you can use a plain old LM7818/7918 pin compatible with the regulator boards and it will sound very good. Then when the boards come in, swap them out.
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote
Old 3rd July 2018, 07:31 AM   #100
AKSA is offline AKSA  Australia
diyAudio Member
 
Join Date: Sep 2001
Location: Melbourne, Australia
Absolutely incredible, Jean-Paul, formidable!!
How you do produce this work so quickly? You an X could be twin brothers.....
Thank you, this is amazing.

Hugh
__________________
Aspen Amplifiers P/L (Australia)
www.aksaonline.com
  Reply With Quote

Reply


Simple High Performance DC Coupled Class A HPA with sub PPM THDHide 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ultra-high performance, yet rather simple - hybrid and more! vzaichenko Solid State 998 13th June 2018 12:12 PM
High Performance Class A Current Feeback Headphone Amplifier monty78pig Headphone Systems 14 12th November 2015 02:01 PM
Simple High-Performance DAC psk Digital Line Level 17 8th September 2014 05:41 AM
simple, high performance amp using DRV134? Fast Eddie D Headphone Systems 6 6th May 2014 06:17 AM
Huginn, High performance, Class A, Lateral FET headphone amplifier Neutrality Headphone Systems 11 7th November 2013 08:29 PM


New To Site? Need Help?

All times are GMT. The time now is 07:41 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki