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

GB for DC coupled B1 buffer with shunt PSUs
GB for DC coupled B1 buffer with shunt PSUs
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 10th June 2010, 07:45 PM   #2041
hawall841 is offline hawall841  Sweden
diyAudio Member
 
Join Date: Jan 2006
Location: Sweden /Strangnas
Hello.I wonder if is to late to buy boards.
  Reply With Quote
Old 10th June 2010, 08:26 PM   #2042
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
GB for DC coupled B1 buffer with shunt PSUs
Hawall841,
We are are still in sign up stage for new edition of Hynotize DCB1.
There is a sign up sheet attached to my signature.
__________________
GB 2017 #2 CLOSED, Boards on Order | Hot-Rod DCB1 boards and kits In Stock, PM | M2C Boards In Stock
  Reply With Quote
Old 10th June 2010, 08:56 PM   #2043
Atilla is offline Atilla  Norway
diyAudio Member
 
Join Date: Jul 2008
I have signed up for two of those. I know I've got the JFETS and the determination to make a DC-coupled B1 and I can't miss out on Blue boards now, can I ?
  Reply With Quote
Old 10th June 2010, 09:20 PM   #2044
hawall841 is offline hawall841  Sweden
diyAudio Member
 
Join Date: Jan 2006
Location: Sweden /Strangnas
I have signed up for two of those..
  Reply With Quote
Old 11th June 2010, 03:31 PM   #2045
wct is offline wct  United States
diyAudio Member
 
Join Date: Jun 2006
I just added two of the blue boards to the sheet.

That makes 99, I should have added one more to make it 100 boards even,
but I dont know how much these boards are.

At what number do boards get ordered? And how much are they, just curious.

Best regards
Curt
  Reply With Quote
Old 11th June 2010, 04:08 PM   #2046
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
GB for DC coupled B1 buffer with shunt PSUs
Curt, We are ready to make a move.
I am just tring to 'burn in' the Prototype over the weekend, and hook it up to an amp and the amp to lowthers to make sure it's noiseless. No noise on Fostex so far, or Sen. HD-600 headphones.

The pricing will be more than double the original GB. It uses more copper, plated through holes, and is a larger unit.

I assume next week will start accepting payments and will keep the buy open for at least 2 weeks, preferably 4. I am also considering a GB for signal resistors if that's of interest again. The Takeman's were very hard to procure, so I dont think that will happen again, unless I move to 1/2 watt resistors, which will cost more.
__________________
GB 2017 #2 CLOSED, Boards on Order | Hot-Rod DCB1 boards and kits In Stock, PM | M2C Boards In Stock
  Reply With Quote
Old 11th June 2010, 04:25 PM   #2047
Atilla is offline Atilla  Norway
diyAudio Member
 
Join Date: Jul 2008
I'd sign up for a GB for signal resistors, just to keep it going. Sourcing a few good resistors is never too much of a problem though, unlike with boards/transistors/chips sometimes.
  Reply With Quote
Old 13th June 2010, 02:33 AM   #2048
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
GB for DC coupled B1 buffer with shunt PSUs
Default Proto Update.

The proto has been running all day, hooked up to heatsinks, running into an amp running into lowthers, no noise. offset very stable, V+/- stable. Will let it run overnight and make sure no other problems, but at this stage, it would be my workmanship I am ironing out.
__________________
GB 2017 #2 CLOSED, Boards on Order | Hot-Rod DCB1 boards and kits In Stock, PM | M2C Boards In Stock
  Reply With Quote
Old 14th June 2010, 06:21 PM   #2049
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
GB for DC coupled B1 buffer with shunt PSUs
throw around some signal resistor ideas and I'll research availability.
__________________
GB 2017 #2 CLOSED, Boards on Order | Hot-Rod DCB1 boards and kits In Stock, PM | M2C Boards In Stock
  Reply With Quote
Old 15th June 2010, 05:54 PM   #2050
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
GB for DC coupled B1 buffer with shunt PSUs
Default Official Kickoff for GB of DCB1 "Blue Edition"

The following is cross posted on my blog

So I am going to write some details down about the DCB1 Blue Edition Buffer. This is the best I can tell, the third or fourth iteration of this buffer/Power supply. The GB will certainly represent the third run of the buffer.

Salas added some tweaks to the design which CRT implemented. I will be offering these boards for sale.

Click the image to open in full size.

Here are some things that make it different,
It's a larger board.
More room for filter caps.
They can handle 10mm pitch snap-in capacitors 25mm width capacitors.

Click the image to open in full size.


There are positions for smaller MUR120 type diodes or MUR820 style TO-220 style diodes.

The vRef LEDS can now be bypassed with a 25mm Film cap or a 100uf electrolytic.

Click the image to open in full size.

The CCS resistor is now about a 28mm pitch, and can easily handle most 5 watt wirewound type of resistors.

2oz copper is used in board, the holes are through hole plated.

There is a 3 pin connector at end of power supply section for easy hookup if the device is used as a stand alone shunt supply.


___
Here are some specifics on the board in the pictures. It is a prototype without a top soldermask. The production units will have a more traditional looking blue soldermask with white legend.My board is complemented with the following notable parts. I went a bit over the top. Wishing I had sprung for the super-through Nichicon's.
  • Nichicon Fine Gold 4700uf capacitors
  • IXYS DSEI8-06A diodes
  • 470R takman carbon film gate resistors for IRF's.
  • Mills 10R MRA-5 resistors for CCS.
  • Wima MKP-10 .22uf vRef bypass

B1 signal resistors
  • 220R Texas Instruments TX2575 foil resistors
  • 220K Caddock TF-020 Film resistor
  • 1M Caddock MK-132

Click the image to open in full size.

Users sound implementations will vary.
Compared to my standard DCB1,
The sounstage is is very tight. The clarity is up a notch as well. When I get spooked by the soundstage, I consider that a good thing.

I hooked these up to DX4 lowthers and there is no noise from the setup.

The price of the board is 15.00 each. Shipping is 6.00 each for up to 4 units. 5-8 units 8.00 and above 8 units, please send me a private message. The payment info address is on the sign up sheet. The group buy ends at 23:59 EST on July 17th. Boards will start shipping likely two weeks later.
__________________
GB 2017 #2 CLOSED, Boards on Order | Hot-Rod DCB1 boards and kits In Stock, PM | M2C Boards In Stock

Last edited by Tea-Bag; 15th June 2010 at 05:57 PM.
  Reply With Quote

Reply


GB for DC coupled B1 buffer with shunt PSUsHide 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


New To Site? Need Help?

All times are GMT. The time now is 06:10 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki