Cheap Fix For Landy's Cheapowatt?
Yeah I think I found the link that failed in Landyacht's Cheapowatt. Stupid stupid design flaw but easy as heck to fix. FULL WAVE BRIDGE RECTIFIER Inline type on a TO247 type case. Four leads i...
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Pop six screws. Then use the "Diode" scale of a meter to test the four inline leads. If the bridge rectifier tests "good" turn out the lights the party's over.
The lack of -any- heatsink on the Cheapo is glaring. So was the first degree burn on my index fingertip. The Cheapo was powering 7-ten watt LEDs at 10 volts. This is stupid beyond reasoning, that the bridge rectifier was that hot. Silicon rectifiers operate all the time at 300F in an automotive alternator. But the Cheapo's bridge rectifier is one size smaller dimension wise than the bridge rectifiers in both the Mega and the Meanwell.
Nefertiti's Barge operational testing of Landys Cheapo must have had that bridge darned near glowing. I must have missed reading Landy's troubleshooting and testing of the bridge rectifier after it went through it's Nevada Test Site exercise. ALL MY CHEAPOS are getting upgraded. Even though they are for mostly low voltage LED power supplies. 10-watt LED cip ma requirements seem to love 10.2 vdc. And the Cheapo shines as a power supply. The Cheapo's walls are dead flat versus the indentations for the power transistors on the Mega and Meanwell. Heatsinking is going to be a snap. My "heliarcer" came up with the idea of fishplate welding full length heatsinks onto the Cheapo. Sixty bucks difference in price to the Mega and a lot more than that to the Meanwell. Lots of $$$ room for a higher capacity bridge rectifier, big heat sinks, and full length heat sinks for the port and aft sides.
I hate to think what a pair of shorted full wave bridge rectifier diodes does to down circuit components ---
The lack of -any- heatsink on the Cheapo is glaring. So was the first degree burn on my index fingertip. The Cheapo was powering 7-ten watt LEDs at 10 volts. This is stupid beyond reasoning, that the bridge rectifier was that hot. Silicon rectifiers operate all the time at 300F in an automotive alternator. But the Cheapo's bridge rectifier is one size smaller dimension wise than the bridge rectifiers in both the Mega and the Meanwell.
Nefertiti's Barge operational testing of Landys Cheapo must have had that bridge darned near glowing. I must have missed reading Landy's troubleshooting and testing of the bridge rectifier after it went through it's Nevada Test Site exercise. ALL MY CHEAPOS are getting upgraded. Even though they are for mostly low voltage LED power supplies. 10-watt LED cip ma requirements seem to love 10.2 vdc. And the Cheapo shines as a power supply. The Cheapo's walls are dead flat versus the indentations for the power transistors on the Mega and Meanwell. Heatsinking is going to be a snap. My "heliarcer" came up with the idea of fishplate welding full length heatsinks onto the Cheapo. Sixty bucks difference in price to the Mega and a lot more than that to the Meanwell. Lots of $$$ room for a higher capacity bridge rectifier, big heat sinks, and full length heat sinks for the port and aft sides.
I hate to think what a pair of shorted full wave bridge rectifier diodes does to down circuit components ---
