Jun 30, 2025 · Radio Spare Part New QJ1830 Linear Voltage Regulator Power Supply Marine Radio Base Station Shortwave Communication Power Supply 13.8V 30A $ 399.55 $ 271.36 &
Linear power supplies are one of the grand elders of ham radio. They’ve been around as long as radio itself. The principle of operation is fairly simple. Household AC voltage is fed to a transformer and dropped down to 12-15 volts. The low voltage AC goes through a rectifier which changes it to DC.
Tube Shortwave Transmitter – Instruction SheetStep 1: Grid tuning procedure It may be necessary to chec the tune from time to time of the Grid circuit. This is especially o if you move from say 6950 kHz to say 7300 kHz. Insert a crystal and tune the PA as normal. Con
This is why switching power supplies are less expensive, more efficient, smaller, and lighter than their elders. And like old school linear power supplies, they can also include extra features. On the down side, switching power supplies have the potential to generate RF interference, especially on the HF bands.
Connect the wires. Attach the positive wire from your power supply to the positive terminal on your ham radio. Ensure it’s connected securely using suitable connectors like ring terminals or Powerpole connectors. Similarly, connect the negative wire from your power supply to the negative terminal on your ham radio. 5. Ensure proper grounding.
Power supplies with a wide range of variable output voltage are more suitable for use as a laboratory power supply. In principle, however, such a power supply can be used for operating a radio station, provided it can deliver the maximum required current at 13.8 V. However, there is a risk in using such power supplies.
And of course SMPS (switch-mode power supplies) have fundamental frequency well above the audio band, so unlike linear supplies there are no 50/60 or 100/120 Hz fundamentals and harmonics to corrupt the audio band (leakage excepted).
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