Ramsey Electronics FZ-146 Specifications download pdf (Page 49)

FX-146 • 49

FX-146 MASTER COMPONENT INDEX

The following pages were prepared to serve these purposes:

1. A general cross-reference for circuit study and servicing;

2. Additional help for parts sorting and identification;

3. An accommodation for experienced builders who prefer to work out their

own assembly sequences. (If you have ANY questions or doubt about a

part, refer to the specified assembly steps and the schematic diagram.)

Key to Component Index format:

A. Part designator number (e.g., C1, Q12, Y2, etc.)

B. Experienced builders always double-check!

C. Part value or manufacturer identification

D. Assembly step number (which also identifies general circuit stage per the

schematic.)

E. Component function note (or space for your own note.)

Key to assembly step letter-number codes:

The letter code indicates the circuit stage(s) in the step-by-step assembly

instructions. The numeral designates the specific step. If you have any

question whatsoever about a particular part, please consult its assembly step.

A: DC Power input

B: Receiver audio amplifier

CR: Receiver FM detector and squelch

DR: Antenna input, T-R switching, filters, RF preamplifiers

EF: VCO (Voltage Controlled Oscillator)

D11,D12 6.2 V Zener RS276-561

VR1 7808 ECG964, SK3630 or RE

VR2 7805 RS276-1770

U1 MC13135 RE or Motorola

U2 LM380 ECG740A, SK3328 or RE

U3 MC12017 RE or Motorola

U4 LM324 RS276-1711

U5 LM358 ECG928, SK3691 or RE

U6 MC145152 RE or Motorola

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Ramsey Electronics FZ-146 Specifications Page 49