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General| Brand | Yaesu |
|---|---|
| Model | FT-290R |
| Category | Transceiver |
| Language | English |
General specifications including frequency coverage, modes, and power requirements.
Transmitter specifications including power output, suppression, and radiation.
Perform initial checks before operating the transceiver, including battery and antenna setup.
Description of the receiver circuit, including RF amplifier, mixer, and IF stages.
Signal flow for Single Sideband (SSB) transmission.
Signal flow for Frequency Modulation (FM) transmission.
Signal path for Continuous Wave (CW) transmission.
Description of the Phase Locked Loop (PLL) synthesizer circuit.
List of necessary equipment for maintenance and alignment procedures.
Alignment procedure for PLL local and IF circuits.
VCV (Voltage Controlled Voltage) line adjustment for PLL.
Adjustment of PLL local frequency.
Alignment of the receiver's first Intermediate Frequency (IF) stage.
Alignment of the FM discriminator circuit.
Alignment of SSB/CW Intermediate Frequency (IF) stages.
Alignment of RF coils for optimal receiver performance.
Alignment of the S-meter for accurate signal strength indication.
Alignment of the Noise Blanker (NB) circuit.
Alignment of the transmitter's RF power output stages.
Alignment of the Automatic Level Control (ALC) circuit.
Alignment of the Power Output (PO) meter.
Alignment of FM deviation for accurate modulation.
Adjustment of the low power output setting.
Adjustment of SSB modulator output transformer.
Adjustment of SSB carrier point for accurate transmission.
Adjustment for carrier balance in USB/LSB modes.
Adjustment of CW carrier frequency.
Alignment of TX balanced mixer, requires spectrum analyzer.
Procedure for checking battery condition and adjustment.
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