OLD THREAD Simplistic Mosfet HV Shunt (The Simpler Simplistic Design by Salas) - Page 13 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Quanghao Audio Design

Quanghao Audio Design Quanghao Audio Design is a producer of DIY Audiophile Kits and PCB boards, selected from many listening tests!

Reply
 
Thread Tools Search this Thread
Old 16th March 2010, 10:51 AM   #121
adamus is offline adamus  United Kingdom
diyAudio Member
 
Join Date: Apr 2008
Please Update the list yourselves when you type:
1. Jogi = 2PCB
2. qusp= 2-3PCB
3. Bas Horneman = 2 PCB
4. hihopes = 2PCB
5. guglielmope = 2PCB
6. Ryssen = 2PCB
7. kstlfido = 6PCB
8.cygnus x1 = 8PCB
9. regal = 4PCB
10. le`flu = 4 PCB
11. vgeorge = 2 pcb
12.jameshillj = 2 pcb
13.dodo = 1 pcb (one)
14.normundss = 2-3 PCB
15. stoolpigeon 4 PCB
16. Nikon1975 = 2 PCB
17. pchw = 4 pcb
18. boudy = 2 PCB
19. Yunick = 1 PCB
20. JimS = 4PC
21. Cambe = 3 PCB
22. av-trouvaille = 6-8 pcb
23. Jean-Charles = 4 pcb
24. Ferrari = 4 PCB
25. piero7 = 2 pcb
26. Zekk needs ONE
27. Joshua_G = 1 PCB
28. ernesternest 2 PCB
29. wobii = 2 pcb
30. Jaap = 2 pcb
31. noizas = 3 pcb
32. housing = 2 pcb
33. h-wan = 1 pcb
34. ichiban = 2 pcb
35. Adamus = 1 pcb
36. mikel_ann = 2 pcb
37. flyboi = 2 pcb
38. ims = 1 pcb
39. touchdown = 1 PCB


edited to 1 pcb, i didnt realise 1pcb = two boards. thanks
  Reply With Quote
Old 16th March 2010, 11:01 AM   #122
regal is offline regal  United States
diyAudio Member
 
Join Date: Jan 2004
Location: MD
Quote:
Originally Posted by quanghao View Post
Simpler Simplistic design by Salas

[on the 22-3 production was finished 2 – 4 - 2010
Then I will send the first day for all of you!

]

Not sure I understand the lead time, you're not saying it took 11 months to make the boards?
  Reply With Quote
Old 16th March 2010, 11:02 AM   #123
adamus is offline adamus  United Kingdom
diyAudio Member
 
Join Date: Apr 2008
two weeks surely?
  Reply With Quote
Old 16th March 2010, 11:05 AM   #124
Yunick is offline Yunick  Sweden
diyAudio Member
 
Join Date: Mar 2006
Location: Gussjö
Paypal sent!
  Reply With Quote
Old 16th March 2010, 11:12 AM   #125
diyAudio Member
 
Join Date: Aug 2008
Quote:
Originally Posted by quanghao View Post
In this Tube (6n2 or 12AX), use some mA. you can use one suppy for it.
But i dont like SRPP for DAC, i fin in my house, if i still have PCb SRPP, i will gift you, don't pay money.
quanghao

If SRPP not good for DAC output can you suggest something better than SRPP and can use Simplistic Mosfet HV Shunt as PSU.


Quote:
Originally Posted by regal View Post
SRPP sounds awful in a DAC, it is very load dependant. Just use a low Rp high gain tube in bypassed cathode with output from the anode. Use 6n6p or 5842 (for more gain), sounds much better than a SRPP, trust me I've tried many tube DAC stages.
regal

What do you propose other than SRPP??
  Reply With Quote
Old 16th March 2010, 11:15 AM   #126
diyAudio Member
 
Join Date: Aug 2008
Quote:
Originally Posted by noizas View Post
quanghao

Can I make Paypal transfer for 3 PCB in amount 3x30 USD, or I need to wait some options for postage cost?

Concerning gabanyayaya SRPP schematic - it shows like I/V ala Lampizator with 6N2P - one solution for I/V, amp and even buffer. If here is question of space in box, it is not worst solution, IMHO.
What is wrong with SRPP as I/V - can you share your experience?


gabanyayaya

Indeed you can use one shunt regulator as power suplly, but better substitute by it only diodes D1-D4 - leaving RC filters separate for L and R channels. This would be reasonable because even SRPP's upper tube works as CCS, this is true only if SRPP designed well - matched on specific Rload.
You can read about it here - The Tube CAD Journal,SRPP Decoded .

If you need to calculate SRPP, just please write me - s.navikas@zebra.lt, I will do it with TubeCAD for my pleasure.
So you saying SRPP only need a simple PSU like CRC filter....rather than the shunt...?
  Reply With Quote
Old 16th March 2010, 11:17 AM   #127
regal is offline regal  United States
diyAudio Member
 
Join Date: Jan 2004
Location: MD
Quote:
Originally Posted by gabanyayaya View Post
quanghao



regal

What do you propose other than SRPP??
You may have to use a different tube depending on gain required.

Click the image to open in full size.
  Reply With Quote
Old 16th March 2010, 11:26 AM   #128
diyAudio Member
 
Join Date: Aug 2008
Quote:
Originally Posted by regal View Post
You may have to use a different tube depending on gain required.

Click the image to open in full size.
Why use LED ? What type?

Do you use a variable R next to 1000R ? So basically this + the shunt sound better than lampizapor ?
  Reply With Quote
Old 16th March 2010, 11:33 AM   #129
adamus is offline adamus  United Kingdom
diyAudio Member
 
Join Date: Apr 2008
led bias is just another way of biasing the grid. the yellow LED will bias to 2v or so, just watch the current ratings, 22ma is quite hot for an LED.

leds have low dynamic resistance, so no need for electrolytic bypass caps as with resistors. less crap in the signal chain.
  Reply With Quote
Old 16th March 2010, 11:39 AM   #130
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
So you saying SRPP only need a simple PSU like CRC filter....rather than the shunt...?
the sound is not good!
I always said that additional sources of energy affect 40% of sound quality. And I love power shunt.
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  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
Simplistic Mosfet HV Shunt Regs Salas Power Supplies 4409 Yesterday 01:21 PM
About the Simplistic Mosfet HV Shunt group by quanghao Quanghao Audio Design 7 18th July 2010 03:31 AM


New To Site? Need Help?

All times are GMT. The time now is 07:55 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