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General| Type | HF Transceiver |
|---|---|
| IF Frequencies | 8.83 MHz, 455 kHz |
| Modes | SSB, CW, AM |
| Sensitivity | 0.5 μV (10 dB S/N) |
| Image Rejection | 70 dB |
| IF Rejection | 70 dB |
| Power Requirements | AC 100-240V, 50/60Hz |
| Audio Output | 2.5 W |
Explains the audio amplification, ring modulation, and SSB signal generation.
Details the signal path from RF input through mixing and IF amplification to AF output.
Discusses the TS-820's single conversion system and its advantages over double conversion.
Explains the Phase Locked Loop system for local oscillation and IF shift.
Details the circuit for shifting carrier frequency and pass-band to reduce interference.
Describes how the AGC signal controls gain in amplifier stages.
Details the noise blanker circuit operation for removing interference.
Lists all capacitor types, part numbers, and specifications.
Lists all resistor types, part numbers, and specifications.
Lists all semiconductor components and tubes with part numbers.
Provides steps to remove the front panel, dial escutcheon, and glass.
Guides on disconnecting and removing the VFO unit from the chassis.
Lists symptoms and causes for receiver malfunctions with remedies.
Lists symptoms and causes for transmitter malfunctions with remedies.
Lists symptoms, causes, and remedies for the DG-1 counter unit malfunctions.
Shows signal levels at various points in the transmitter section.
Displays signal levels across different bands in the receiver section.
Lists the necessary measuring instruments for adjustments.
Covers carrier unit and VCO voltage adjustments for the receiver.
Covers drive coil, bias, and carrier suppression adjustments.
Details the steps for adjusting the PLL unit.
Lists parts for the counter assembly unit of the DG-1.
Lists parts for the counter mixer unit of the DG-1.
Lists specifications and parts for the YG-88C filter.
Lists specifications for the DS-1A power supply.
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