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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Doug Self Preamp from Linear Audio #5
Doug Self Preamp from Linear Audio #5
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Old 25th August 2017, 04:05 PM   #811
tER299 is online now tER299  Netherlands
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Quote:
Originally Posted by scottjoplin View Post
I noticed today actually there is an updated BOM in the first post in this thread. That's all I know. The errors that exist are minor
Ah, thanks for the quick reply! I checked it, but it seems to contain the same errors (no R5, but 2 R4s, and a counting error in 47K for R24, R40 and the second DELAY_ON).
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Old 25th August 2017, 04:23 PM   #812
scottjoplin is offline scottjoplin  Wales
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Oh well, as I said, nothing too major, just don't double up on the chips
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Old 25th August 2017, 07:24 PM   #813
Rick G is offline Rick G  United States
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Doug Self Preamp from Linear Audio #5
Default Final Preamp

Doug Self & Carl Huff, i hope you don't mind your names on this. If so, i will remove them. Sounds GREAT. Thank you to Both of you.

Rick
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Old 25th August 2017, 07:29 PM   #814
Carl_Huff is offline Carl_Huff  United States
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Originally Posted by Rick G View Post
Doug Self & Carl Huff, i hope you don't mind your names on this. If so, i will remove them. Sounds GREAT. Thank you to Both of you.

Rick
Very nice build Rick!

I am honored to have contributed to it.
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Old 25th August 2017, 08:21 PM   #815
Rick G is offline Rick G  United States
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Doug Self Preamp from Linear Audio #5
Thank you Carl. I have to admit it was a fun build.
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Old 4th September 2017, 02:09 AM   #816
hfxrzw is offline hfxrzw  Netherlands
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Looks great Rick, compliments!!
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Old 5th September 2017, 05:49 PM   #817
Carl_Huff is offline Carl_Huff  United States
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Default Finished Project PICs

Thanks to our good friends at Photobucket my previously posted PICs of the finished builds have disappeared. As result I have posted them again. Both builds are in regular use and a pleasure to listen to.

The build in brushed natural aluminum is a 1U package.

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My black brushed aluminum build with meters is a 2U solution

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Old 5th September 2017, 06:01 PM   #818
jan.didden is offline jan.didden  Europe
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Very nice Carl!

Jan
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Old 5th September 2017, 06:03 PM   #819
scottjoplin is offline scottjoplin  Wales
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Still wish someone would correct the BOM for all the poor souls who are being confused by it, and potentially making incorrect purchases
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Old 5th September 2017, 06:26 PM   #820
Carl_Huff is offline Carl_Huff  United States
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Originally Posted by scottjoplin View Post
Still wish someone would correct the BOM for all the poor souls who are being confused by it, and potentially making incorrect purchases
Actually there is a thread of sanity to the BOM madness ...

The BOM (as well as the schematic) describes the passive parts required for a single channel. The preamp is two channels, thus the need to double the passive parts called out in the BOM.

The op amps are active parts and are listed in the BOM as the number required to complete the project. This may sound crazy to some but it is a practice that I established a long time ago when a single quad op amp might service up to four channels and projects might have 'n' channels.

Please write your confusion off to my old habits. Ha, ha ...

If you are truly interested I invite you to adjust the BOM to your satisfaction, forward it to me and I will make it available to all that want it.
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