Ramsey Electronics FZ-146 Specifications download pdf (Page 54)

FX 146 • 54

FL: FILTERS

[ ] [ ] D7 BA482 PIN M34b See T-R switch theory

[ ] [ ] D8 1N914 or 1N4148 G34 works with D10,C85: see PLL theory

[ ] [ ] D9 1N914 or 1N4148 A18

[ ] [ ] D10 1N914 or 1N4148 G35 see D8

[ ] [ ] D11 1N914 or 1N4148 M31 assures positive switching by U4D

[ ] [ ] D12 1N914 or 1N4148 M32 " " " U4C

[ ] [ ] D13 1N914 or 1N4148 H8a disables -RPT during receive

[ ] [ ] D14 1N914 or 1N4148 H8b turns on Q15 during receive

[ ] [ ] D15 1N914 or 1N4148 H7 disables +RPT during receive

[ ] [ ] D16 1N914 or 1N4148 H9 turns off offsets during Simplex

[ ] [ ] D17 LED M42 transmit indicator

[ ] [ ] D18 1N4002 A7

[ ] [ ] D19 1N914 or 1N4148 H6 disables AUX offset for receive

[ ] [ ] D20 6.2 volt Zener diode CR32

[ ] [ ] D21 not used

[ ] [ ] D22 1N914 or 1N4148 M36

[ ] [ ] D23 BB505 varactor E10 VCO L-C tuning

[ ] [ ] D24 1N914 or 1N4148 G36

[ ] [ ] D26 1N914 or 1N4148 TX36

[ ] [ ] D25-DX 1N914 or 1N4148 Stage H Synthesizer Programming

[ ] [ ] FL1 21.4 MHz. crystal CR30 Receiver 1st IF

[ ] [ ] FL2 455 KHz. ceramic CR18 Receiver 2nd IF

[ ] [ ] J1 5-pin DIN A12 Packet I/O

[ ] [ ] J2 miniature 3.5mm. B15 Speaker connection

[ ] [ ] J3 SO-239 TX45 Antenna

[ ] [ ] J4 subminiature 2.5mm. M43 Microphone

J: JACKS

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Ramsey Electronics FZ-146 Specifications Page 54