Kenwood VFO-180 User Manual

Details on frequency range, mode, power consumption, dimensions, and weight.

Covers sensitivity, rejection, stability, and selectivity parameters.

Details input power, impedance, suppression, radiation, and response.

Explains the four tunable memories and split-frequency operation.

Describes high power output, reliability, and protection circuits.

Covers transceive bands, WWV reception, and provisions for WARC allocations.

Highlights the microprocessor control for frequency display and memory.

Details the signal path, amplification, mixing, and detection stages.

Explains the signal flow from microphone to antenna output.

Describes the adjustable noise-sampling frequency and interference avoidance.

Details the use of IF amplifier for compression and selectable time constants.

Explains how the RF POWER control adjusts output level via ALC.

Discusses benefits of an optional SSB crystal filter for S/N and selectivity.

Describes the microphone attenuator for gain control.

Explains ALC start level variation based on mode and band.

Details the unit generating signals for display and memory.

Explains counter, display driver, tone signal, and interface functions.

Describes the push-pull amplifier stage for 10W output.

Overview of frequency generation using PLL and premix circuits.

Details the differences and features of the PLL assembly unit.

Provides absolute maximum ratings for the 2SC1907 Si NPN Epitaxial Planer Transistor.

Details absolute maximum ratings for the 2SK125 N Channel Si J-FET.

Provides absolute maximum ratings for the BA379 RF Attenuator (Pin diode).

Details the DUAL 4-BIT BCD/BINARY COUNTER.

Shows absolute maximum ratings for the SRF 1714 RF band power amplifier.

Details the PRESETTABLE DECADE COUNTER/LATCH.

Details the DECADE COUNTER.

Details the 6-DIGIT DECADE COUNTER.

Details the HEX. INVERTING BUFFER.

Details the VOLTAGE REGULATOR.

Details the transistor used in the PS-30.

Illustrates and labels all controls and indicators on the front panel.

Illustrates and labels all connectors and ports on the rear panel.

Shows the layout of internal modules from the top side.

Shows the layout of internal modules from the bottom side.

Detailed schematic for the RF unit (X44-1280-00).

Detailed schematic for the COILPACK unit (X44-1290-00).

Detailed schematic for the IF unit (X48-1240-11).

Detailed schematic for the AF VOX unit (X49-1130-00).

Detailed schematic for the LPF unit (X51-1180-00).

Detailed schematic for the PREMIX unit (X50-1570-00).

Detailed schematic for the 10 W FINAL unit (X56-1330-00).

Detailed schematic for the VFO unit (X40-1140-00).

Schematics for COUNTER ASS'Y and DISPLAY units.

Schematic for the MATRIX unit (X53-1130-00).

Schematics for PLL ASS'Y and PLL units.

Schematics for MEMORY and CONTROL units.

Lists common capacitors, resistors, semiconductors, potentiometers, switches, and miscellaneous parts.

Lists necessary equipment for performing adjustments.

Procedures for carrier unit, VFO, RIT, and oscillator adjustments.

Covers VCO voltage, frequency, scan speed, and PLL BPF adjustments.

Covers TX BPF, base current, RF detector, ALC, and protection adjustments.

Procedures for BPF, tuning circuit, and mixer balance adjustments.

Covers VCO and scan speed adjustments for memory functions.

Illustrates the physical layout of the VFO-180 unit.

Lists operating frequency, circuit type, output voltage, stability, and dimensions.

Shows the internal functional blocks and their interconnections.

Details input voltage, output voltage, current, ripple, dimensions, and weight.

Illustrates the physical layout of the PS-30 power supply.

Covers frequency range, impedance, power, and dimensions.

Illustrates the physical layout and components of the AT-180 tuner.

Lists general parts including instruments, power meter, transceiver, and adjustment controls.