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Hi Gene :)
On Tue, 2012-05-08 at 11:13 -0400, gene heskett wrote:

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> On Tuesday, May 08, 2012 10:32:50 AM Ralf Mardorf did opine:

> > When I turned on my 7 year old Behringer

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> >

> Using its age as a clue, I think I would be gong through it with a

> "Capacitor Wizard" checking the caps in the psu in particular.

I guess I already found the problem. On the primary side there are a 1u

50V and a 47u 25V capacitor, both 85°C. Thomas said I should replace

them with > 100°C, even if they look ok.

I've got capacitors on stock, but bad equipment for soldering. Unsolder

already was hard, but I can't get it soldered, especially since the 47u

I've got, has got a larger diameter, since it's a 35V. Reading glasses

btw. are less good for soldering, I need to find a better tool to see

when soldering. Thomas has got some special glasses.
> I haven't a clue what it may be called on your side of the pond though, so

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> I will describe what it does in hopes it might be recognizable as a euro

> made and named testing device.

>

> It is a small, low power oscillator, generating about 85 millivolts of rf

> signal, at a nominal frequency of 100 kilohertz, the currant it can send

> through a capacitor is presented on a meter, usually calibrated with a knob

> so that it reads full scale when the probes are shorted together.

Thomas has got Hameg oscilloscopes with component testers.
Btw. the capacitors I unsoldered are broken now, even if they should

have been ok before. Not because of heat, but to take hold of the

capacitors damaged them.
> Having a spare for that sort of thing is a good idea.  Asking if it will

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> fail is like asking if freshly poured concrete will crack.  The "if" is

> wrong, the correct word is "when", because it will, always. :)

I'm not a fan of switching power supplies.
> Good luck Ralf.

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>

> Cheers, Gene

Thank you Gene, Thomas tries to visit me in some hours.
Ralf
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