Total newbie post - trying to replace ext. PS on vintage Mark Levinson ML-1 preamp

yamezxx · 2nd August 2009, 05:38 PM

Sorry for the newbie post, but here goes.

I recently purchased some vintage audio gear at an estate sale auction. One piece of gear was a Mark Levinson ML-1 solid state preamp, which dates from approximately '77 to '80. Unfortunately, the external power supply was not included. Thus far, I've been unable to find a replacement online. I'm hoping something eventually pops up on eBay. In the meantime, I'm thinking of building a quality power supply so that I can actually make use of the preamp until I find the real deal online.

I have experience with a soldering iron building speakers and can follow (though not design) a schematic. I've never dealt with power supplies before and don't know the first thing about them. Mark Levinson tells me that the power supply was plus or minus 15V, 500mA each rail. They weren't sure of the pin configuration, and the connector is a bit of a mystery as well (see below).

Any suggestions or insights on where to start would be greatly appreciated. Thank you very much.

mightydub · 2nd August 2009, 10:21 PM

A simple way to get started is here: http://sound.westhost.com/project05a.htm

See mouser.com and/or digikey.com, etc. for parts. You may also be able to find a mate for the connector, or just get a new male/female connector pair that fits the hole in the chassis. With basic electronics knowledge, you should be able to open up the chassis and determine the connector pinout.

Once you have something simple like that behind you and are feeling like tackling something more complicated, there are several different regulator designs to be found here on the forum, and probably many people who will insist that a Mark Levinson design demands a more sophisticated regulator. But for now, start simple and bring that piece back to life.

Also if you post in the Solid State forum there's probably someone who can come up with the schematic for the preamp and original regulator.

Tosh · 6th August 2009, 12:37 AM

Here's one from Marchand for $100. A bit pricey, but ready to solder together...

johnYks · 04:31 PM

Even better! the real thing

On ebay recently.....

http://cgi.ebay.com.au/ws/eBayISAPI....=STRK:MEWAX:IT

2nd August 2009, 05:38 PM	#1
yamezxx diyAudio Member Join Date: Aug 2009	Total newbie post - trying to replace ext. PS on vintage Mark Levinson ML-1 preamp Sorry for the newbie post, but here goes. I recently purchased some vintage audio gear at an estate sale auction. One piece of gear was a Mark Levinson ML-1 solid state preamp, which dates from approximately '77 to '80. Unfortunately, the external power supply was not included. Thus far, I've been unable to find a replacement online. I'm hoping something eventually pops up on eBay. In the meantime, I'm thinking of building a quality power supply so that I can actually make use of the preamp until I find the real deal online. I have experience with a soldering iron building speakers and can follow (though not design) a schematic. I've never dealt with power supplies before and don't know the first thing about them. Mark Levinson tells me that the power supply was plus or minus 15V, 500mA each rail. They weren't sure of the pin configuration, and the connector is a bit of a mystery as well (see below). Any suggestions or insights on where to start would be greatly appreciated. Thank you very much.

26th August 2009, 04:29 PM	#4
johnYks diyAudio Member Join Date: May 2006	Even better! the real thing On ebay recently..... http://cgi.ebay.com.au/ws/eBayISAPI....=STRK:MEWAX:IT Last edited by johnYks; 26th August 2009 at 04:31 PM. Reason: Clutz _don't know how to send complete page...

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Mark Levinson ML1 Preamp Schematic	thermionic	Solid State	3	25th February 2009 11:26 PM
Mark Levinson 38 Preamp Schematic	highviewvideo	Everything Else	6	13th June 2007 04:08 PM
Mark levinson No.26 preamp Schematic	Adams_Leo	Solid State	2	29th December 2006 10:54 PM
Replace Mark Levinson ML-2 with MJ15024/15025 need help	emergency	Solid State	15	29th April 2006 08:20 PM
My Mark Levinson 38S was out-performed by a $1150 passive preamp	Sunsun22	Chip Amps	4	28th June 2005 12:53 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

2nd August 2009, 10:21 PM	#2
mightydub diyAudio Member Join Date: Dec 2006	A simple way to get started is here: http://sound.westhost.com/project05a.htm See mouser.com and/or digikey.com, etc. for parts. You may also be able to find a mate for the connector, or just get a new male/female connector pair that fits the hole in the chassis. With basic electronics knowledge, you should be able to open up the chassis and determine the connector pinout. Once you have something simple like that behind you and are feeling like tackling something more complicated, there are several different regulator designs to be found here on the forum, and probably many people who will insist that a Mark Levinson design demands a more sophisticated regulator. But for now, start simple and bring that piece back to life. Also if you post in the Solid State forum there's probably someone who can come up with the schematic for the preamp and original regulator.

6th August 2009, 12:37 AM	#3
Tosh diyAudio Member Join Date: Jan 2004 Location: Silicon Valley	Here's one from Marchand for $100. A bit pricey, but ready to solder together...

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)