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DougL DougL is offline

diyAudio Member

About Me

  • About DougL
    Biography
    BSEE, Test Engineer, Support Engineer
    Location
    Wheaton IL.
    Interests
    Tube Audio, Computer Games, Fishing
    Occupation
    Computer Telephony Consultant
    Country
    United States
  • Signature
    Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well)
    Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus

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General Information
  • Last Activity: Yesterday 08:52 PM
  • Join Date: 12th February 2004

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Blog

View DougL's BlogRecent Entries
Latest Blog Entry

Posted 8th March 2016 at 05:16 PM by DougL Comments 6
Posted in Uncategorized
I am so tired of hearing that anyone who listens to SET amplifiers "Must like distortion".

It must be comforting to be that simple.

The reality of the situation is a single ended tube amplifier is a very specific solution to a very specific problem.

The topology results in an implementation that has vanishingly low distortion at very low power levels.

This is a direct result of three factors,
Low distortion of the audio triodes used, the lack of multiple devices and the avoidance of the non-linear magnetic behavior around zero crossing.

FWIW, this only works in the tube world for very low power on very efficient speakers.

I still have memories of listening to a Klipsch horn with a Phase Linear 400. I could not stay in the room at any power level. It was near class B and arguably the worst amplifier ever made. Still, it took an efficient speaker to highlight its faults.
...

Posted 11th July 2013 at 10:55 PM by DougL Comments 2
Posted in Uncategorized
In this post the User clams that the Compression driver Atlas PD5V is a derivative of the WE555, which was good down to 100 Hz


http://www.diyaudio.com/forums/multi...ml#post3558010

There was also mention of an AES paper on how to create a phase plug for a cone driver.

Based on Romy's ideas on a mid-bass horn, This might cover down to 200 / 300 hz to transition to a Tapped horn.

Posted 21st January 2013 at 11:13 PM by DougL Comments 1
Posted in Uncategorized
I have 2 Horn projects.
I would like to try a
SEOS / Econowave style with a SEOS 12 / 15 and a Denevo 360 compression driver.

I also want to try a LTO style 3 way
http://www.diyaudio.com/forums/multi...ml#post3189501

I am trying t do this inexpensively.
Looking at JMLC 400 1.4" mid-ranges
Radian 636 CD
B&C DE10 or B&C DE7 CD
JMLC 1000 or JMLC 1400

Looking for an approprate woofer.
The GPA 515 is beyond my means at the moment.

JBL 2226H are also reputed to be great

The TD15M has a following.

I have a DCX2496 and 6 channels of 30W class D amplification.

Posted 10th January 2013 at 11:01 PM by DougL Comments 0
Posted in Uncategorized
Recent Comments
Headphones are very...
Posted 7th April 2016 at 02:35 AM by abraxalito abraxalito is offline
i like it
Posted 12th March 2016 at 05:09 PM by sieras sieras is offline
I agree. The devil is...
Posted 10th March 2016 at 10:41 AM by Bas Horneman Bas Horneman is offline
I am not trying to "win"...
Posted 9th March 2016 at 03:29 PM by DougL DougL is offline
you can definitely make...
Posted 9th March 2016 at 02:48 PM by Sk8Ter Sk8Ter is offline
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