Ramsey Electronics FT146 User Manual
Page 7
FT146
• 7
Inductors and ferrite cores:
❒
2 Shielded can tunable inductor (marked 007007) [L9,13]
❒
2 Tunable inductor (pink plastic body) [L5,11]
❒
2 6 hole ferrite bead core [L1,6]
❒
2 Small ferrite bead core [L10,12]
❒
2 Aluminum coil shield cans [for L5,11]
Semiconductor devices:
❒
1 1N4002 style black epoxy diode [D5]
❒
2 1N4148 style signal diode (glass body with black band) [D2,4]
❒
1 BB609 varactor diode (black body with yellow color band) [D1]
❒
1 Zener diode, 6.2 volt (gray body with black band) [D3]
❒
2 2N3904 NPN transistor (marked 2N3904) [Q1,2]
❒
1 2SC2498 or 2SC2570A VHF/UHF NPN transistor (marked C2498 or
2570A) [Q3]
❒
1 NE021 flat pack NPN transistor (marked 021) [Q4]
❒
1 2N3866 metal can NPN transistor [Q5]
❒
1 SD1127 metal can RF power transistor [Q6]
❒
1 2N3906 style PNP transistor (marked 221334) [Q7]
❒
1 LM358 dual op-amp IC chip [U1]
❒
1 LED Light emitting diode [LED1]
Special components:
❒
1 Crystal 16.280 MHz (for 146.520 MHz output) [Y1]
❒
1 5 pin DIN connector [P1]
❒
1 RCA style phono jack [J1]
❒
1 2.5MM sub-miniature phono jack [J2]
❒
1 Push-on aluminum heat sink
❒
1 5/16" x 20 bolt (to wind coils on)
❒
1 1/2 feet enameled magnet wire
❒
1 1/2 feet tinned buss wire
Required, not supplied:
❒
12 volt DC power source at 1 amp minimum
❒
Microphone
❒
Dummy load or suitable antenna
❒
Enclosure such as the Ramsey CFT