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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 2nd October 2015, 12:36 PM   #21
zrxshack is offline zrxshack  United States
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Join Date: Apr 2009
Please put me down for 1 kit.

Thank You.
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Old 2nd October 2015, 04:15 PM   #22
rock12 is offline rock12  United States
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Join Date: Nov 2010
Location: midland mi
put me down for one kit thanks
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Old 2nd October 2015, 05:00 PM   #23
Carl_Huff is offline Carl_Huff  United States
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Join Date: Dec 2004
Location: Bakersfield, CA
Great!

Let's start a group buy list. I'll leave it up for 30 days or so. Expect delivery to be mid to late November

georgebrooke - 1kit
Halauhula - 1 kit
hfxrzw - 2 kits
PJN - 1 kit
kiroje - 1 kit
still4given - 1kit
GlennW - 1kit
erik777 - 1 kit
arthur - 1 kit
zrxshack - 1 kit
rock12 - 1 kit

If you have asked to be added to the list but don't see your name be sure to let me know!
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Carl Huff
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Old 2nd October 2015, 05:05 PM   #24
Carl_Huff is offline Carl_Huff  United States
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Join Date: Dec 2004
Location: Bakersfield, CA
A quick note in response to questions that I have received via email ...

* The film capacitors are all specified as WIMA
* The electrolytics caps as Nichicon MUSE
* And the resisitors are all to be 1% metal film.

All parts (not in the kit) are available from Mouser. I will be providing a detailed BOM
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Carl Huff
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Old 2nd October 2015, 05:24 PM   #25
Carl_Huff is offline Carl_Huff  United States
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Join Date: Dec 2004
Location: Bakersfield, CA
This preamplifier draws a bit of current, upwards of 650 milliamps steady state. It deserves to be fed by a quality & quiet power supply. Anybody here have a tested favorite? To this point I have been using my dev lab power supply.

This project requires a +/-15 volt supply that can sink 1 amp (allows for project addons). Bring out your power supplies!

Anybody here have a 'tried and true' low parts count series pass dual regulator using a MOSFET as the pass element??

That would be interesting ...
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Carl Huff

Last edited by Carl_Huff; 2nd October 2015 at 05:30 PM.
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Old 2nd October 2015, 05:59 PM   #26
georgebrooke is offline georgebrooke  United Kingdom
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Join Date: Oct 2006
Location: Cambridge, UK
Default Power Supplies

Quote:
Originally Posted by Carl_Huff View Post
This preamplifier draws a bit of current, upwards of 650 milliamps steady state. It deserves to be fed by a quality & quiet power supply. Anybody here have a tested favorite? To this point I have been using my dev lab power supply.

This project requires a +/-15 volt supply that can sink 1 amp (allows for project addons). Bring out your power supplies!

Anybody here have a 'tried and true' low parts count series pass dual regulator using a MOSFET as the pass element??

That would be interesting ...
Although it does not quite fit your spec, I have used the design at Power Supply for Preamps several times without any problems at all. It does go back to 2007 .

George
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Old 2nd October 2015, 06:11 PM   #27
Carl_Huff is offline Carl_Huff  United States
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Join Date: Dec 2004
Location: Bakersfield, CA
Quote:
Originally Posted by georgebrooke View Post
Although it does not quite fit your spec, I have used the design at Power Supply for Preamps several times without any problems at all. It does go back to 2007 .

George
Hello George,

Yea, that's a very standard (yawn ...) design straight from the TI app notes . I have a similar (if not the same) circuit as a stock item myself. In fact I have a couple of variations committed to fabbed PCBs on hand should anyone be interested.
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Carl Huff
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Old 2nd October 2015, 06:36 PM   #28
georgebrooke is offline georgebrooke  United Kingdom
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Join Date: Oct 2006
Location: Cambridge, UK
Default Excitement

Quote:
Originally Posted by Carl_Huff View Post
Hello George,

Yea, that's a very standard (yawn ...) design straight from the TI app notes . I have a similar (if not the same) circuit as a stock item myself. In fact I have a couple of variations committed to fabbed PCBs on hand should anyone be interested.
Yes, it would be nice to have something a little more exciting..and which works well of course. I guess we need some more input on this one.
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Old 2nd October 2015, 07:11 PM   #29
canute is offline canute  Denmark
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Join Date: Sep 2005
How do we pay ? Do you have paypal ?

If so - please count me in for 1 kit

Best regards

Knud
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Old 2nd October 2015, 07:23 PM   #30
Carl_Huff is offline Carl_Huff  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Bakersfield, CA
Quote:
Originally Posted by canute View Post
How do we pay ? Do you have paypal ?

If so - please count me in for 1 kit

Best regards

Knud
Yup, I have PayPal. I will add your name to the list. I will begin invoicing people for payment early November. Delivery should be no later than mid month.
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Carl Huff
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