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RCI2990 sez "I'm melting, melllltiiiiing!

nomadradio

Analog Retentive
Apr 3, 2005
5,463
7,943
573
Louisville, KY
www.nomadradio.com
The RCI2990 should have a fuse no bigger than 4 or 5 Amps in the AC line fuse, right?

So what happens if you use a 20 Amp fuse? To start, insulation will melt from the heat of the transformer's wires.

6HaJco.jpg


In this case, it seems the two low-voltage secondary wires have melted together and shorted.

1H03nr.jpg


And these choke coils got pretty hot before the house breaker tripped.

The High Rupture Current fuse says 20 Amps. Leads me to suspect the house breaker was rated at 15 Amps. The fuse didn't trip.

No idea how this radio got to be this way to start. Now it has a chinesium switchmode brick. I have sold almost a dozen of this type transformer on Ebay. They started piling up. Didn't send them to the scrap yard. They don't bring a lot of money on fleabay, but at least they aren't going to the landfill.

This transfomer will be getting scrapped. Just don't trust it.

73
 

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    Of course the 1st day it is nice outside and I go plop the true Rod Of God for 20m on the mobile, All I hear is a couple of yokels talking about bowel movements. What's the 6m calling freq? 50.125?
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