From: ohg...@gmail.com   
      
   On Friday, February 2, 2024 at 10:22:49 AM UTC-5, legg wrote:   
   > On Thu, 1 Feb 2024 11:14:13 -0800 (PST), "ohg...@gmail.com"    
   >  wrote:    
   >    
   > >I'm going through some stuff I have to move (retiring in June) and trying   
   to decide what to keep. I have a Burr Brown 501 dual supply that puts out   
   +/-15 volts with 115 VAC in. The supply is working but I don't know what's its   
   use was originally. It's    
   a compact block and it's heavy, but there's no current rating listed and I   
   haven't been able to find out anything about it. Is it supposed to supply a   
   reference for calibrating meters or is it used as a power supply? Not being   
   adjustable I wonder if it's    
   made for something specific. Any insight appreciated.   
   > It's just a supply aimed at permanent installation    
   > in analog circuits.    
   >    
   > If it's got air holes, (or you can crack the case)    
   > you might see an internal preset pot or two -    
   > one to adjust output (11-16V)    
   > and one for balance -    
   > sometimes a current limit adjustment.    
   >    
   > It might have some value as an antique.    
   >    
   > RL   
      
   No ventilation of any kind - just small and heavy - which is why I thought it   
   might be used for a micro current reference source.  It is pretty tightly   
   regulated even with no load other than the meter as it reads 15.01 (Fluke 177)   
   and doesn't change from    
   100 to 150 VAC.   
      
   I guess I can put a one amp load on it and see if it gets hot or fails...   
      
   Thanks for the reply.   
      
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