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Modular Series
L2X Stereo Line Preamplifier/Buffer
PSX Power Supply
User's Manual
Revised Feb. 23/14
Mapletree Audio Design
Lloyd Peppard
R. R. 1, Seeley's Bay, Ontario, Canada, K0H 2N0
(613) 387-3830
www.mapletreeaudio.com
info@mapletreeaudio.com
© Copyright Lloyd Peppard 2002-2014
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Summary of Contents for Mapletree L2X Stereo Line
- Page 1 Modular Series L2X Stereo Line Preamplifier/Buffer PSX Power Supply User’s Manual Revised Feb. 23/14 Mapletree Audio Design Lloyd Peppard R. R. 1, Seeley's Bay, Ontario, Canada, K0H 2N0 (613) 387-3830 www.mapletreeaudio.com info@mapletreeaudio.com © Copyright Lloyd Peppard 2002-2014...
- Page 2 Power Supply Connections______ The Mapletree L2X consists of a preamplifier chassis with provision for connection to the separate PSX power supply. This allows separation between the two units and eliminates induced hum originating from power supply circuitry and components. The Mapletree PSX power supply provides 12 VDC at 0.6 A for the heater supply and +250 VDC at full...
- Page 3 Wait 60 sec with the unit unplugged before removing the bottom cover. If the fuse blows a second time, you should not try to operate the unit. Contact Mapletree Audio Design for information regarding service.
- Page 4 Infrequently, a heater may burn out which is indicated by total loss of sound. Replacement tubes can be obtained from several suppliers in the U. S. and Canada. Mapletree Audio Design will attempt to provide replacement tubes to customers at cost plus shipping. Some listeners enjoy trying different brands and variants of tubes.
- Page 5 Mapletree Audio Design L2X Stereo Line Preamplifier © Copyright Lloyd Peppard 2002-2014 Rev. Feb. 18/14 +250 V Input resistors shown for 47.5K 1% gains of 0 dB (475K) and 12SN7GT 10 dB (100K) 511K 1% L. Line inputs 100K 1% Source 47.5K...
- Page 6 Mapletree Audio Design Preamplifier Power Supply PSX © Copyright Lloyd Peppard 2012-14 Rev. Feb 23/14 Power 0.5A/250V MUR180 6.8K 5W 115 VAC 25 mA 100u/400V 100u/400V Power Out 120AC 60 Hz Rear View 330K/1W Chassis V A C 1.5K V A C...