RE: [APML] ST-4 question-UPDATE WITH NO RESOLUTION

[Alan Voetsch <alanv12952@yahoo.com>]

Hey John,

--- John Mirtle <spampit@shaw.ca> wrote:
> The ST4's have a common problem with the bridge rectifier. All power
> goes
> through the rectifier whether it's AC or DC. If the CCD head gets
> less than 10 volts, it's sensitivity drops like a rock.

Well, that's a new one. Never heard of a bridge rectumfire. Bad thing
is that I will not be able to check anything out for awhile as the
long-forecasted clouds have moved in. They are here to stay for awhile
according to the 7 day forecast.

> In addition the Peltier cooler
> would not be getting it's full quota of power. If you are handy with
> a
> soldering iron or know someone who is, SBIG will probably send you
> one.
> Pretty much all of the symptoms you mention could be explained by
> this
> problem, especially by one that is thermally intermittant.

I don't even have a soldering iron. But, I could get one if I had a
schematic to show me what I was doing. Then again, maybe there are
dozens of obscure parts that could cause the weird readings. Have you
or anyone else ever had the rectifier go bad and then replaced it?  

Thanks,
Alan




	
		
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