MC-100B
I don’t have one of these, but one of the site’s readers (Steve Kulak) kindly donated a schematic. The schematic (though gratefully recieved) was not as clear as it might have been but fortunately an update was provided by another reader, Trevor Lowes.

Yaqin MC-100B
Click the schematic to view:
Comments
Pingback from Higher quality MC-100B schematic is here | Yaqin Tube Valve Amplifiers
Time: March 10, 2010, 10:20 am
[...] http://yaqin.slickpepper.org.uk/amplifiers/yaqin-mc-100b [...]

Pingback from MC100B and MS-34D schematics added | Yaqin Tube Valve Amplifiers
Time: March 1, 2010, 2:55 pm
[...] http://yaqin.slickpepper.org.uk/amplifiers/yaqin-mc-100b [...]