GB for DC coupled B1 buffer with shunt PSUs - Page 156

Salas · 18th November 2009, 10:43 PM

Quote:

Originally Posted by AndrewT

why is the modification the case for the universal version but not for the DCB1 version?

I found that in the case of DCB1 by introducing some deliberate asymmetry to the Vref current (this having an impact to Vleds too) I could feel it subjectively more pleasing, plus it helped somewhat easier offset in audio parts Jfets pairs by rather grosser matching standards as far as I have checked on some couples. Of course it will work both ways. But in the case of using it as a pair of shunt regs for general use, I have shown the orthodox way in that psu only guide. I don't know what circuits could be supplying and if there will be any fortunate synergy or not. Back in this very thread I have referred again about the Vref current asymmetry, it was when discussing an Australian Hypno proto build if I recall correctly. So the Jfet orientations on the PCBs are as intended and further tested in the proto phase. Each PCB that T-Bag delivered is compliant to the circuits that were finally decided and proto tested. For the learned members that will like to change whatever in the orientations or in the way that the error amp of the reg sees the load, they are more than welcome to show alternatives in the build thread. Some may want to listen to alternatives and follow. As it is on the boards given, is exactly as intended to be from me, and as the proto team tested and liked enough.

Regards, and happy building / listening to all. Will be great to see your builds in the dedicated thread.

Tea-Bag · 21st November 2009, 04:43 PM

If anyone is still waiting for boards in the first shipment, please private message me.
Thanks!

Sergelisses · 21st November 2009, 07:03 PM

Hi Tea-Bag
I am interesting by the PCB DC coupled B1 buffer with shunt PSUs .
What is the price for the PCB .
How to be in second round ?

Best regards
Serge

Tea-Bag · 21st November 2009, 07:08 PM

Follow the link in signature and sign up on spreadsheet.
The costs, if volume is met, would be 5.50 for hynotize and 6.50 for mesmerize. Shipping for <5 units is 5.00.

Sergelisses · 21st November 2009, 08:45 PM

hi

what are the differences between hynotize and mesmerize. ?

Thanks

Serge

rikkert1978 · 21st November 2009, 09:18 PM

hynotize has only 1 input, mesmerize has more then 1. Think it has 6 actually, but I am not sure.

korben69 · 21st November 2009, 09:37 PM

Mezmerize : 6 symetric inputs and 1 symetric output with rotative selector.

Salas · 21st November 2009, 10:07 PM

The inputs are single ended in both. Symmetric +/- shunt regulators and output delay on both, 1 straight input in the small one, 6 relay switched inputs in the big one. No signal coupling capacitors.

dudaindc · 22nd November 2009, 02:43 PM

Quote:

Originally Posted by Tea-Bag

If anyone is still waiting for boards in the first shipment, please private message me.
Thanks!

I got mine this time - thanks!

The boards look great!!!

Thanks to all that contributed to this project.

merlin2069er · 22nd November 2009, 04:04 PM

I wonder if there is any interest in a group buy for the audio grade resistors for the dcb1?

I'd be interested.

21st November 2009, 07:08 PM	#1554
Tea-Bag not politcally affiliated diyAudio Member Join Date: Feb 2006 Location: Kennebunk Blog Entries: 11	Follow the link in signature and sign up on spreadsheet. The costs, if volume is met, would be 5.50 for hynotize and 6.50 for mesmerize. Shipping for <5 units is 5.00. __________________ SemiSouth R085/R100A JFET available now DCB1/BiB #3 on order : SSHV2 Sign up Sheet/Payup Sheet Ends 2-26-2012 CLICK HERE

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

21st November 2009, 04:43 PM	#1552
Tea-Bag not politcally affiliated diyAudio Member Join Date: Feb 2006 Location: Kennebunk Blog Entries: 11	If anyone is still waiting for boards in the first shipment, please private message me. Thanks!

21st November 2009, 07:03 PM	#1553
Sergelisses diyAudio Member Join Date: Nov 2003 Location: Near PARIS	Hi Tea-Bag I am interesting by the PCB DC coupled B1 buffer with shunt PSUs . What is the price for the PCB . How to be in second round ? Best regards Serge

21st November 2009, 08:45 PM	#1555
Sergelisses diyAudio Member Join Date: Nov 2003 Location: Near PARIS	hi what are the differences between hynotize and mesmerize. ? Thanks Serge

21st November 2009, 09:18 PM	#1556
rikkert1978 diyAudio Member Join Date: Aug 2005	hynotize has only 1 input, mesmerize has more then 1. Think it has 6 actually, but I am not sure.

21st November 2009, 09:37 PM	#1557
korben69 diyAudio Member Join Date: Nov 2006 Location: Near Lyon	Mezmerize : 6 symetric inputs and 1 symetric output with rotative selector.

21st November 2009, 10:07 PM	#1558
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	The inputs are single ended in both. Symmetric +/- shunt regulators and output delay on both, 1 straight input in the small one, 6 relay switched inputs in the big one. No signal coupling capacitors.

22nd November 2009, 04:04 PM	#1560
merlin2069er diyAudio Member Join Date: Sep 2008 Location: Toronto	I wonder if there is any interest in a group buy for the audio grade resistors for the dcb1? I'd be interested.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)