micro pdp11/83 power supply

David Collins davidkcollins2 at gmail.com
Sun May 13 01:08:10 CDT 2018

Check the mains filter x2 capacitor. 

Sent from my iPad

> On 13 May 2018, at 3:51 pm, Waldemar Brodkorb via cctech <cctech at classiccmp.org> wrote:
> Hi,
> I started to revive an old Micro PDP11/83 I have for over 12 years
> now. It is fully assembled and last time I tried to start the
> machine it some kind of started.
> My biggest issue at the moment is the power supply.
> After the machine is running for a while, let's say 10 minutes and
> then when I poweroff, the power supply starts producing a lot of
> dense smoke. The smell is very penetrant.
> What can I do with the power supply? Do I need to exchange it
> completely or just parts of it?
> At the moment I removed it from the case like described here:
> http://www.bitsavers.org/pdf/dec/pdp11/microPDP11/EK-MIC11-TM-002_MicroPDP11_Systems_Technical_Manual_Sep85.pdf
> Thanks in advance for any starting hints,
> Waldemar

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