Ramsey Electronics Treasure finder TF-1 Instruction Manual page 10

"jumper" connection wires later. Resistors are not polarized, they may
mount in either direction.
7. Install LED D1. Being a diode, this component is polarized and must
be oriented correctly. Examine the LED and notice how one lead is
longer than the other. The longer of the two leads is the anode, or (+)
connection. Most diodes also have a flat side molded in the component
body. This corresponds to the cathode or (-) side of the part.This flat
should face in the direction of the band marking of the diode. Leave the
diode leads as long as possible as this component will also mount to the
front panel as a power indicator.
8. Install R1, 1K ohm (brown-black-red).
Now that wasn't so bad was it? You've just completed the power supply part
of your treasure finder. Pretty soon you will be searching for shell casings at
the scene of the crime!
Next we'll work on the local oscillator section of the circuit. Be sure to mount
the components as close to the printed circuit board as possible to provide
for reliable oscillator operation.
9. Install R12, 100K ohm (brown-black-yellow). It is located adjacent to
the front panel pot R11.
10. Identify D2, the varactor diode (marked MVAM 108). Although it may
at first look like one of the transistors, note that it only has two legs. Due
to a change in the PC board, the diode must be installed with the flat
side placed opposite of the way the silkscreen shows.
11. Identify and install L2, the "wire-wound" slug tuned coil. Remember
to keep the parts as close to the circuit board as possible. Use care
when installing this component as not to strain the mounting legs when
inserting the part into the pc board.
12. Install C16, .01uF disc capacitor (marked .01 or 103 or 10nF).
Remember to save those scrap component leads; you'll be needing
them in a little while.
13. Install C19, 470pF disc capacitor (marked 470 or 471).
14. Install C2, .1 uF disc capacitor marked 104).
15. Install C8, another .1 uF disc capacitor marked 104).
16. Install C15, .1uF disc capacitor (marked 104).
17. Install C17, a .0015 uF disc capacitor(marked .0015 or 1500K).
TF1 • 10