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The initial goal of this page was to help identify the transformer codes used in
JTM45 and JMP50 amplifiers and how they overlapped over the years.
This goal has grown into what I call the Historic Data Base page.
This page contains information on the external and internal components used
in the JTM45 and JMP50 amplifiers from the 60's through the 80's.
If you have any comments, questions or would like to contribute
to this page
please email me @ Info@Marstran.com
Available in January. The new 139 50W OT
Historic Data Base
127 amps and growing
Special thanks to Solid Body Guitar for their contribution to this page.
Page updated 1/03/04
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Since May 14 2001
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