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Using it for ham radio. My older linear supply becomes rather hot after a 15min CW (morse) chat. The Samlex SEC 1223 is a switcher and remains cool through 30min at full power where my transceiver draws 20A during "key down". Then the fan comes on so I can go on without it overheating. The fan noise is in my opinion very tolerable, just a strong air rushing but no buzzing sound. It would be nice if it came on gradually but no big deal. Most impressive: It is a single-layer board built around the really old TL494 chip. Yet ... no RF noise that I could find! Hat's off to the designer.
Verified purchase: Yes | Condition: Pre-owned
All the parts needed to repair mother the board.
Verified purchase: Yes | Condition: New
The item is not better than expected, because one mosfet Q1 was defective. I ordered another one and now the power supply works fine.
Verified purchase: Yes | Condition: New
Nice power supply. I haven't had any particular problems, but if you're a Ham you might want to consider a model you can tune the birdies away from your frequency with.
Verified purchase: Yes | Condition: Pre-owned
This kit replaces all of the commonly failed parts in the power supply, however, it does not include the 680uF 200v caps or R17, which is a 1.5 kOHM resistor that feeds 24 volts to the PWM control IC. If you install this kit and the voltage is still jumping around and you hear a slight rattle from the transformer, check for 24 volts on Pin 12 of the IC and R17. Replacing R17 should fix the problem.
Verified purchase: Yes | Condition: New
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