mf x-p100 power supply - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

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
Thread Tools Search this Thread
Old 19th February 2014, 08:50 AM   #1
diyAudio Member
Join Date: Aug 2009
Default mf x-p100 power supply

Hi all.

I've got a musical fidelity x-p100 pre amp here to fix.

Fault - primary winding on the toroidal power supply has gone open circuit.
Issue - unmarked transformer, nothing at all.

So, is anyone willing to share what the output windings are on this beast ?
or the voltages on the 5 pin plug/socket.

  Reply With Quote
Old 19th February 2014, 10:31 PM   #2
diyAudio Member
Join Date: Aug 2009
Ok, never mind.
Opened the preamp and found the voltages marked on the circuit board.

For future reference;
transformer is ~ 20watts, and is potted into the lower half of the power supply case with potting resin, so unless you really want to, it'd be easier to replace the entire assembly with a new case etc.

71 - 0 - 71
0 - 11

pin1 71vac
pin2 0vac
pin3 71vac

pin4 0vac
pin5 11vac

interesting side note, the preamp circuit board is set out to accept the nu-vista tubes.
in the tubes place are ztx transistors.
so without digging to far, looks like it could be a pretty easy mod to turn a x-p100 into a nu-vista pre..........
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
MF MA50 power supply - voltage reduction CastleJohn Solid State 27 23rd June 2013 09:05 AM
MF Citation12 - MF gate resistor value NVD33 Pass Labs 14 21st September 2010 07:30 PM
Power Transformer for MF NuVista CD Player Roy3932 Power Supplies 6 17th May 2007 02:50 PM

New To Site? Need Help?

All times are GMT. The time now is 04:33 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2