05-28-2013, 02:21 PM
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Join Date: Dec 2008
Location: Silicon Valley CA, Storm Lake IA
| | Messenger M175 Schematic?
Looking to repair this M175 for a local. Not too familiar with amps. The CBTricks site for the Messenger schematics - states that the schematics are wrong. Doesn't matter that much, as they don't list the M175 model anyway.
On the a/b/c side of the input xformer, there are two diodes that have been burned up and removed by the owner of the amp. Picture below shows a black arrow as to where one of the burned diodes was removed. On the other side of of the a/b/c xformer, the other diode was also burned and removed. Were the original diodes used 1N4001's? Any info, experience with this amp, repair tips, or usable schematic link is appreciated.
BASE: Kenwood TS-2000, GAP Titan DX, Diamond X50A, Sirio SY27-4, and IMAX 2000.
MOBILE: Galaxy DX99V w/RF Limited CR-577 mic, Sirio Z-180. Yaesu FT-8800R & Diamond NR-770.
Last edited by Robb; 05-28-2013 at 06:40 PM.