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

[steve banbury <banburys@sonic.net>]

I thought salsa went well with chips!

Actually you could check voltages with a hand held multimeter and see if 
the hemetic smoke has oozed out of  one of the
rectumfliers in the bridge.  But lets see what SBIG has to contribute.

Steve

John Mirtle wrote:

>Alan,
>	I am not suggesting that you go out and buy a soldering iron! You
>don't want to develop soldering skills on your ST4, it is best left to
>someone who knows a bit more than which end of a soldering iron to hold on
>to. The older ST4's (I am not sure how old) used a rectifier without a
>heatsink. Mine does not have one, it is 1993 vintage. As I live in Canada,
>heat sinking of components is usually not required for product used
>outdoors. (risk of snow tonight, in fact) The newer ones are apparently
>fine. I have used mine under low voltage conditions and many of your
>symptoms I observed. I just wanted to throw my best guess into the ring
>along with everyone else, since this had not been mentioned. I am curious to
>hear what SBIG come back to you with, be sure to let us know! 
>	My money's still on the rectumfryer. :)
>
>John Mirtle
>Calgary, Ab. Canada
>http://members.shaw.ca/jmirtle 
> 
>
>-----Original Message-----
>From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org] On
>Behalf Of Alan Voetsch
>Sent: Thursday, September 09, 2004 9:12 PM
>To: Discussion of Film Astrophotography
>Subject: RE: [APML] ST-4 question-UPDATE WITH NO RESOLUTION
>
>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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