Click image to enlarge

Description

Plans for a tube powered capacity switch. Like a motion control switch an approacing person sets off the switch which can controll a:
 
  • Window Display - an Outdoor Light - a Burgular Alarm - or other electrical appliance.
  • Tubes required 2050 Thyratron - 117L7/M7
  • As this is an older plan (1950) some of the parts to build them may or may not be readily available - however a substitution may be made or the parts may be found right here on ebay.

This is an original 3 page magazine article from 1950.
We do not photocopy these.
 

Article Includes
  • Measured Drawings and Diagrams
  • Complete Instructions

Payment

Payment: by Paypal, Visa, Mastercard, Discover, American Express, Apple Pay, G Pay, accepted thru eBay. Items shipped upon receipt of payment.  

Shipping

  • Multiple Items may be grouped to save on shipping. When buying more than one item please use the shopping cart for the best shipping price.
 
  • Rates:
    • $4.50 for USPS first class / or media mail service
    • $8.70 for priority mail service.
    • $4.50 for Canadian shipping
    • $6.00 other International shipping. For Tracked International service you must use ebay International shipping - price varies.

About Us

Grandpa's Secrets

Discover a Wealth of How-to Projects
& Plans from a Bygone Era.

Explore our Scientific & Mechanical
History in Vintage Hobby, Craft,
& Technical Magazine Articles.