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Posts that Interest me
Old

PC Crossovers

Posted 10th February 2011 at 08:36 PM by DougL

This looked Interesting.

http://www.diyaudio.com/forums/multi...ml#post1033586

I'll have to research that.
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Old

Great Snubber Article

Posted 13th October 2010 at 03:36 PM by DougL

http://www.diyaudio.com/forums/parts...ml#post2330818
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Old

Lynn Olson's Book List

Posted 30th September 2010 at 03:52 PM by DougL

This speaks for itself:
http://www.diyaudio.com/forums/multi...ml#post2318365
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Old

PassDIY LDR

Posted 30th July 2010 at 11:10 PM by DougL
Updated 14th September 2010 at 07:33 PM by DougL

http://www.diyaudio.com/forums/analo...ml#post2258073

This looks cool.
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Old

Fdnr

Posted 1st July 2010 at 11:28 PM by DougL
Updated 14th September 2010 at 07:34 PM by DougL

http://www.diyaudio.com/forums/parts...-resistor.html

Motorola used one on their first cell phone.

Chauser eleptical low pass with nulls at 4.5k and 9k iirc.

Now I am wondering if I could create a "passive line level" with this, avoiding inductors.

Here is a link to a design article:
http://electronicdesign.com/article/...sband6366.aspx
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Old

Active inductor substitutes

Posted 3rd May 2010 at 02:45 PM by DougL
Updated 14th September 2010 at 07:34 PM by DougL

Here is a circuit I like.
Not excessive voltage drop, no absolute expectations on voltage or current.

http://aquinaudio.webspace.virginmed...act_choke.html

A link to the discussion in the Tube Forum

http://www.diyaudio.com/forums/tubes...ml#post2173626
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Old

Power supplies for B1

Posted 9th February 2010 at 08:51 PM by DougL
Updated 28th April 2010 at 07:44 PM by DougL

My brother gave me a Pass B1 board.
Now that he has his working I thought I would look at mine.

I am going to use this space to record all of the links and tricks. Some of the links will be very basic.

http://www.national.com/ds/LM/LM317.pdf

http://optimus.meleeisland.net/downl...s/mc78xxct.pdf

http://www.quasarelectronics.com/kit...c-kit/3060.pdf


http://www.tubecad.com/2007/06/blog0109.htm

http://www.tubecad.com/2007/07/blog0113.htm

http://www.tubecad.com/2008/11/blog0151.htm

http://www.wenzel.com/documents/finesse.html

http://www.borbelyaudio.com/psshunt.asp
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Old

CSS bias

Posted 12th January 2010 at 04:32 PM by DougL
Updated 13th January 2010 at 09:52 PM by DougL

I found a great comment in post http://www.diyaudio.com/forums/tubes...3a-driver.html post #10.

Very few details were given, but it caught my imagination.
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Old

Build your own case

Posted 20th November 2009 at 09:52 PM by DougL

http://www.diyaudio.com/forums/const...ml#post1987690

These are answers I need.

Thanks.
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Old

Tube Voltage Regulator, Is it worth the effort

Posted 27th October 2009 at 11:31 PM by DougL
Updated 13th January 2010 at 09:53 PM by DougL

This thread has some good, solid information and very little bravado.

http://www.diyaudio.com/forums/tubes...th-effort.html

Special Mention to:
janneman
Tubelab
kevinkr
Allen Wright
Bas Horneman
SY

For their interesting contributions.

IMHO, There are several ways to make an adequate Power supply. And several ways to totally botch the job.

In the 1980's, I was totally against using solid state in a tube preamp. However, this was more about not using low voltage devices in high voltage circuits than anything else.
Now that high voltage transistors are available this is not a major consideration.
My first tube amp is going to be a platform to play with some of the discussions.
I want to try unregulated and regulated power supplies. I will probably start out with unregulated choke input supplies.

It...
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