Troubleshooting Guide; Troubleshooting Guide - Ramsey Electronics FM10C Manual

ANTENNA ALTERNATIVES
If your situation involves a single large building or multi-level home where
reception from the FM10C antenna tends to be uneven because of walls and
other VHF path obstacles, you might set up the FM10C's output in a "carrier-
current" configuration. If you know how to do correctly, then do so - safely.
If not, you can show your FM10C and this book to a licensed radio engineer
and negotiate with that person for a safe installation which will feed your sig-
nal through interior wiring of your home or building. Do not attempt such an
installation unless you know exactly what to do and not to do. Also, because
such an installation is beyond the original purpose of this kit and the safety
standards intended for all Ramsey kits, and because we have not tested the
FM- 10A in such an installation, we cannot provide further details for such an
installation.

TROUBLESHOOTING GUIDE:

If your FM10C does not work at all, re-check the following:
correct orientation of U1 (see PC board parts layout diagram)
correct polarity of all electrolytic capacitors,
Correct orientation of regulator VR1
correct orientation of Q1 transistor,
correct value of C18,
complete with no bridges all solder connections.
Hints:

Frequency drift is usually caused by a weak battery or operation at
large temperature extremes.

Erratic or unstable operation is caused by faulty solder joints or cable
connections.
Standard 2SC2570 replacements: ECG10 or SK9139, may be found at most
local electronics parts dealers.
FM10A 24