I suspect a bad pass T. With an ohmmeter you should get somewhere around 13
ohms (give or take 10 ohms) between base and emitter, and base and collector,
infinite with reversed leads. Infinite both ways from emitter to collector.
Rick



Dale Botkin wrote:

> When I unplug J3, disconnecting the regulator from the transistors, I get
> a nice solid stable 28.5V from the LM317, and I can adjust it up or down.
> As soon as I connect the regulator output to the transistor bases, I
> measure 44.0V on the output of the LM317 and at the transistor bases.

> I don't measure any obvious collector-base shorts on Q1 or Q2, but it sure
> is acting like it.  Or am I missing something?
>
> Dale
> ---
> We are Dyslexia of Borg.
> Fusistance is retile.
> Your ass will be laminated.
>
>   ------------------------------------------------------------------------
>                    Name: TS930pwr.png
>    TS930pwr.png    Type: PNG image file (IMAGE/png)
>                Encoding: BASE64

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics