Nice new boxes

Comments

• Microcontrolled Posts: 2,461

  2013-08-31 12:56 edited 2013-08-31 12:56

  I'm more curious about that "capacitance substitution" box in the background. Does that basically act as a capacitor with adjustable Farads? If so, where is it possible to purchase one of these, that thing would be a lifesaver in analog prototyping.
• localroger Posts: 3,452

  2013-08-31 12:59 edited 2013-08-31 12:59

  Microcontrolled wrote: »

  I'm more curious about that "capacitance substitution" box in the background. Does that basically act as a capacitor with adjustable Farads? If so, where is it possible to purchase one of these, that thing would be a lifesaver in analog prototyping.

  
  That's exactly what it is; they also make resistor substitution boxes, and your'e exactly right about their utility. Google will help you find one; they vary greatly in price and accuracy.
• Bob Lawrence (VE1RLL) Posts: 1,720

  2013-08-31 13:05 edited 2013-08-31 13:05

  • @TMicrocontrolled
    
    I'm more curious about that "capacitance substitution" box in the background
    od
    
    CAPACITOR SUBSTITUTION BOX SOLDER KIT NEW
  • 100 pF TO .1 uF
  • 24 VALUES

  http://www.ebay.com/bhp/capacitor-substitution-box (A variety )
• RDL2004 Posts: 2,554

  2013-08-31 13:05 edited 2013-08-31 13:05

  Does that basically act as a capacitor with adjustable Farads?

  
  Yep, and it's one of the more useful things to have on the lab bench. That one is an IET Labs CS-300. Don't buy a new one they cost too much. I got mine on eBay for $60
  
  I like this kind a lot better than the ones that use knobs or slide switches to adjust because you can read the set value more easily.
• RDL2004 Posts: 2,554

  2013-08-31 13:10 edited 2013-08-31 13:10

  Here you go....
  
  
  http://www.ebay.com/itm/IET-Labs-CS-300-100V-Capacitance-Substituter-/290968910218
• Publison Posts: 12,366

  2013-08-31 13:24 edited 2013-08-31 13:24

  Strange, I've alway got white, not brown, boxes as you describe, but with the brown Parallax logo filament tape. The new boxes look even cooler!
  
  As far as substitution boxes, I have one of these:
  
  

  

  
  
  Resistor and capacitors. Will do straight resistance, straight capacitance, parallel RC, and series RC. I change all the caps out as it is over 30 years old, and i figured some dried out.
  
  Some on ebay right now:
  
  http://www.ebay.com/sch/i.html?_trksid=p2047675.m570.l1313.TR0.TRC0.XEico+1140&_nkw=Eico+1140&_sacat=0&_from=R40
  

  

  

  eico1140.jpg

  912 x 684 - 106K

  eico1140.jpg 106.4K
• Genetix Posts: 1,774

  2013-08-31 17:01 edited 2013-08-31 17:01

  I used to not think much about packing until I worked in the industry. Those litho labeled OPFs look really nice even though they cost more than the standard Kraft (Brown) RSCs. I remember reading in a trade magazine that customers prefers flashy packaging even though it costs more. I've found that Parallax uses OPFs when you have a small order shipped by UPS even though the fee is higher.
• Whit Posts: 4,191

  2013-08-31 19:44 edited 2013-08-31 19:44

  The box is so nice... maybe I need to order something... ;-)