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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.

Special Mention to:
Allen Wright
Bas Horneman

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.

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Beast with a Thousand JFETs

Posted 28th September 2009 at 07:17 PM by DougL

Originally Posted by Nelson Pass View Post
Jam called me up and asked if I have ever paralleled up a
bunch of 2SK170's and 2SJ74's to make a power output

I guess it's time to unveil the Beast with a Thousand JFETs.

Here's the first teaser, a circuit panel to hold 588 JFETs and
associated resistors.
What can I say. Its a pleasure to see a master at work.
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Tube Cad Jurnal Interesting Items

Posted 9th September 2009 at 04:59 PM by DougL

In John's TCJ Blog He featured the Logitech power supplies For Duet and Squeezebox.

Since I have an SB3 and have been thinking of upgrading the power supply, this is a great source of inspiration to me.
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Zero Feedback Impedance Amplifiers

Posted 2nd September 2009 at 05:15 PM by DougL
Updated 2nd September 2009 at 06:52 PM by DougL

This amplifier is also an example of original thinking.

For anyone interested, here is the URL to the Amplifier.

I think this design just made my bucket list.
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SS Tabor

Posted 1st September 2009 at 03:00 AM by DougL

Someone was discussing a SS version of a tube amp. Look for SS Tabor

Cool site.

There are a couple of SS transformer amps.

All of them look cool to me.
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Project: RAKK DAC

Posted 31st August 2009 at 07:20 AM by DougL

I have had my RAKK DAC going for a while now. Great DAC. I bought a case and the RAKK DAC passive board to replace the EDCOR transformers I was using and I am using the Shunt volume control to select the shunt resistor.

Goal is to get it done this week.
I will post pictures after its complete.
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Posted in My Projects
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Why is there air?

Posted 31st August 2009 at 03:44 AM by DougL
Updated 31st August 2009 at 06:51 AM by DougL

A series of posts by someone who's nom de plume is an obnoxious comedian. Wonderful.

Harmless. However, it takes up a lot of the board's energy for a time.
This too shall pass.

I haven't found "Texas" yet. The Mods used to post hilarious commentary along with the outrageous posts. As the board has matured, not so much. It was a deep fried Twinkies kind of guilty pleasure.
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Posted 31st August 2009 at 01:35 AM by DougL
Updated 31st August 2009 at 06:51 AM by DougL
Bud is very enlightening.
Its a joy to have him comment positively about several companies.
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Tubelab PP

Posted 28th August 2009 at 02:35 AM by DougL
Updated 31st August 2009 at 06:52 AM by DougL

Here is an example of engineering I admire.
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Blog for Doug Lockwood

Posted 28th August 2009 at 02:04 AM by DougL
Updated 31st August 2009 at 06:53 AM by DougL

I am going to use my blog to document threads that I am interested in.

This caught my interest.

Looking at a B1 buffered Lightspeed.
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