B1 Buffer Preamp - Page 26

spencer · 20th July 2008, 12:10 PM

NP D1 DAC clone with enhancement

R-K Rønningstad · 20th July 2008, 03:00 PM

Very impressive. Thank you, Spencer.

RK

supernet · 20th July 2008, 10:35 PM

Have anybody done any listening tests with B1 yet ?

stefanobilliani · 22nd July 2008, 11:03 AM

Quote:

Originally posted by supernet
Have anybody done any listening tests with B1 yet ?

Yes Many of them

Is it reasonable to build a second output to this buffer ?

riotubes · 22nd July 2008, 11:55 PM

Does anyone see any issues--noise or otherwise--with placing this buffer in a box with a transformer volume control (I'm using S&B transformers)?

Diomedian · 23rd July 2008, 03:21 AM

I wasn't thinking and ordered a 24V regulated wall wart, and 25V 15000uF caps for the power supply. Would anyone think it's a bad idea running the caps this close to their limit?

thanks,
-d

Zen Mod · 23rd July 2008, 04:47 AM

Quote:

Originally posted by riotubes
Does anyone see any issues--noise or otherwise--with placing this buffer in a box with a transformer volume control (I'm using S&B transformers)?

bingo

stefanobilliani · 23rd July 2008, 07:57 AM

Quote:

Originally posted by Diomedian
I wasn't thinking and ordered a 24V regulated wall wart, and 25V 15000uF caps for the power supply. Would anyone think it's a bad idea running the caps this close to their limit?

thanks,
-d

No it isnt. They will just work great .

AndrewT · 23rd July 2008, 08:26 AM

Quote:

Originally posted by Diomedian
I wasn't thinking and ordered a 24V regulated wall wart, and 25V 15000uF caps for the power supply. Would anyone think it's a bad idea running the caps this close to their limit?

thanks,
-d

it might be belt and braces but since you plan to run them at near maximum voltage consider reforming them before connecting to the PSU.

feed them from 30Vdc with a series 100k resistor to limit the maximum current while the insulator reforms. You can measure the leakage current through the cap after a couple of hours by monitoring the voltage drop across the 100k resistor.
Maybe reform for half a day, then put to full voltage duty.
For any that suffer a high leakage, try reforming for a couple of days and recheck or throw them away.

h_a · 23rd July 2008, 10:12 AM

Reforming brand new caps?

What's the reason for this?

Have fun, Hannes

22nd July 2008, 11:55 PM	#255
riotubes diyAudio Member Join Date: Jun 2005 Location: Los Angeles	Does anyone see any issues--noise or otherwise--with placing this buffer in a box with a transformer volume control (I'm using S&B transformers)? __________________ Cheers ~ Mike

23rd July 2008, 03:21 AM	#256
Diomedian diyAudio Member Join Date: Nov 2004 Location: Halifax, N.S.	25V caps I wasn't thinking and ordered a 24V regulated wall wart, and 25V 15000uF caps for the power supply. Would anyone think it's a bad idea running the caps this close to their limit? thanks, -d

23rd July 2008, 10:12 AM	#260
h_a diyAudio Member Join Date: Sep 2006 Location: Graz, Austria	Reforming brand new caps? What's the reason for this? Have fun, Hannes __________________ fresh matched IRFP240/IRFP9240 fets \|\| AlephJ/JX-kits F5 transistor kits \|\| Burning Amp BA-1/2 transistor kits

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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
buffer/preamp?	TheDriver41	Chip Amps	2	3rd October 2004 08:40 AM


	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

20th July 2008, 12:10 PM	#251
spencer diyAudio Member Join Date: Jun 2004 Location: Hong Kong	NP D1 DAC clone with enhancement

20th July 2008, 03:00 PM	#252
R-K Rønningstad diyAudio Member Join Date: Jan 2006 Location: Oslo	Very impressive. Thank you, Spencer. RK

20th July 2008, 10:35 PM	#253
supernet diyAudio Member Join Date: Dec 2001 Location: Europe	Have anybody done any listening tests with B1 yet ?

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