6V6 line preamp - Page 34

tinitus · 5th January 2012, 03:57 PM

Quote:

Originally Posted by buzzforb

Salad
I want to ......

got a new 'nick name', I didnt know

buzzforb · 5th January 2012, 04:00 PM

Wow! That looks really fresh. Sorry about the slip up Salad.

I just noticed that the trafo I was looking at had 300ma rating not 30. My bad, although it seemed to work out in the greater scheme of things.

Salas · 5th January 2012, 04:05 PM

200VA for this is super royally mega plenty. You would not want big trafo magnetic field very near though.

buzzforb · 5th January 2012, 05:16 PM

I had planned on seperate PSU enclosure with CR->umbilical chord(1ft)->C, SSHV2. 200VA was only 5$ more than 100VA.

Salas · 5th January 2012, 05:27 PM

Keep the CRC very near to SSHV2 in the main pre box.

buzzforb · 5th January 2012, 06:07 PM

I was under the impression that when doing a standalone PSU, you do most of the filtering away from the main chassis, with only the last C inside before regs. Do you suggest just the trafo on a standalone box?

nicoch58 · 5th January 2012, 07:41 PM

Nick nice feta ...

Salas · 5th January 2012, 07:44 PM

The trafo, the rectification, and that's it. If it was CLCLC or CRCRC it could go 50%-50%. Its better to fully filter what comes riding on the umbilical too if using simple one stage filtering you see.

stajo · 7th January 2012, 05:16 PM

I breadboarded one. Sounded great already on the plank with AC heating and and a dual C-L-C-R-C-L-C. Very little noice and some tiny trafo noice with the ear in the cone.

Gonna tune it up when I get parts for SSHV2.

best
Staffan

Salas · 7th January 2012, 05:28 PM

Well done. Pictures?

5th January 2012, 07:41 PM	#337
nicoch58 diyAudio Member Join Date: Oct 2004	Nick nice feta ... __________________ Sic58

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
Help me design my DAC/Line Preamp.	kuroguy	Tubes / Valves	7	2nd April 2009 09:31 PM
preamp line ctt	richwalters	Tubes / Valves	1	7th March 2008 05:34 PM
Preamp for Line In and Mic	blur	Instruments and Amps	1	4th January 2007 05:02 PM
Line stage preamp, based on SY's "Heretical Unity gain line stage"	Danko	Tubes / Valves	23	18th July 2005 05:07 AM
Line preamp for 2A3 amp	Petman	Tubes / Valves	0	24th May 2002 04:11 PM

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

5th January 2012, 04:00 PM	#332
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	Wow! That looks really fresh. Sorry about the slip up Salad. I just noticed that the trafo I was looking at had 300ma rating not 30. My bad, although it seemed to work out in the greater scheme of things.

5th January 2012, 04:05 PM	#333
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	200VA for this is super royally mega plenty. You would not want big trafo magnetic field very near though.

5th January 2012, 05:16 PM	#334
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	I had planned on seperate PSU enclosure with CR->umbilical chord(1ft)->C, SSHV2. 200VA was only 5$ more than 100VA.

5th January 2012, 05:27 PM	#335
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Keep the CRC very near to SSHV2 in the main pre box.

5th January 2012, 06:07 PM	#336
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	I was under the impression that when doing a standalone PSU, you do most of the filtering away from the main chassis, with only the last C inside before regs. Do you suggest just the trafo on a standalone box?

5th January 2012, 07:44 PM	#338
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	The trafo, the rectification, and that's it. If it was CLCLC or CRCRC it could go 50%-50%. Its better to fully filter what comes riding on the umbilical too if using simple one stage filtering you see.

7th January 2012, 05:16 PM	#339
stajo diyAudio Member Join Date: Jun 2011 Location: Stockholm	I breadboarded one. Sounded great already on the plank with AC heating and and a dual C-L-C-R-C-L-C. Very little noice and some tiny trafo noice with the ear in the cone. Gonna tune it up when I get parts for SSHV2. best Staffan

7th January 2012, 05:28 PM	#340
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Well done. Pictures?