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Eagle International RP330N power supply.

 
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Eagle International RP330N power supply.

Post by sideband » Tue Oct 06, 2015 2:08 pm

I've had a quick scan around the net and can't seem to find anything about this at all. In fact I can't find anything about Eagle International regarding the electronic stuff that was around in the 70's.

I have this power supply at work which has expired rather spectacularly at some point. It would be useful to get it up and running again if possible. There are four 2N3055's in it and a couple of smaller transistors one of which doesn't measure like a transistor at all. It's marked EBC (so definitely a transistor rather than a FET) and the number is 1021 (so possibly a 2SA1021). It's only a small signal type so maybe a BC108 would even work.

There are two 1000uF caps which have vented so I'll change those anyway. However if anyone can provide a circuit or some information on it that may help me to get things going again I would be a happy bunny.

Thanks in advance for any help.

 
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Re: Eagle International RP330N power supply.

Post by Refugee » Tue Oct 06, 2015 2:49 pm

Is it a "lab" power supply or just a simple regulated type?

 
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Re: Eagle International RP330N power supply.

Post by Alistair D » Tue Oct 06, 2015 3:03 pm

Eagle International were not a manufacturer, they badge engineered other peoples product. Mostly they did not even bother to change the model numbers so it is quite likely that your PSU was originally a model RP330N.

It would be worth posting a picture in case someone recognises it under another name.

Study any PCBs for clues to the manufacturer.

Al

 
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Re: Eagle International RP330N power supply.

Post by sideband » Tue Oct 06, 2015 4:19 pm

I don't think it's really a 'lab' type power supply. I've replaced the two vented caps and after a bit of digging I think the O/C transistor is a 2SD1021. I've replaced it with a BC639 (taking care of lead-out arrangements). Switching on produces a red light on the front (which happened before) No output volts and a new cap getting warm...... :ccf It's not overvolts causing distress to the cap, it appears the voltage to it is reversed. Caps in the right way of course (according to the PCB and the old one that came out). So no further forward yet.

Here are some pictures taken with it on my unusually tidy desk at work.....
Attachments
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P1120098.JPG

 
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Re: Eagle International RP330N power supply.

Post by Cathovisor » Tue Oct 06, 2015 4:24 pm

Judging by the logo it's late 70s/early 80s. In the 1979 price list I have there is reference to an RP230N, but that's it...

 
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Re: Eagle International RP330N power supply.

Post by Refugee » Tue Oct 06, 2015 6:15 pm

Those white chip sockets look like the kind that go intermittent.
Give them a waggle and see if you get anything.

 
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Re: Eagle International RP330N power supply.

Post by davegsm82 » Tue Oct 06, 2015 10:44 pm

A liberal dose of Servisol Super 10 on the IC sockets and a multimeter across the cap that's getting warm would be my first suggestions.

Don't leave it on if it's getting hot, hot = Pressure, Pressure = exploding caps.

Dave.

 
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Re: Eagle International RP330N power supply.

Post by sideband » Wed Oct 07, 2015 7:35 pm

Management have bought a shiny new power supply today so repair of the old one is probably not worth it now. I don't like throwing things out so may persevere a little longer. Apparently it's an old legacy item anyway from the days before the company was taken over so no loss if it ends up in the skip. It'll be useful for the 2N3055's and transformer if nothing else.

 
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Re: Eagle International RP330N power supply.

Post by Refugee » Wed Oct 07, 2015 7:40 pm

I would offer it FOC as there is likely to be someone down your way whom would be prepared to fix it.


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