Description and Opeartion of the General Purpose Variable Delay Unit
Abstract
The general purpose variable delay unit is a device designed for obtaining a trigger pulse delayed in time from an input trigger. The amount of delay time can be varied continuously from a fixed minimum value of about 10 microseconds (approximately 1 statute mile) to a maximum of about 2400 microseconds (approximately 200 nautical miles), depending of course on the period between input triggers. In fact, the maximum delay can be up to 85 percent of the duration of this period. The unit will accept a positive or negative trigger rising to at least 50 volts in .5 microsecond and supplies a positive or negative trigger output. The output triggers rise to 90 percent of maximum amplitude in .2 microsecond with positive output of 70 volts at 75 ohms impedance and negative output of 200 volts at 4000 ohms impedance. The delay circuit used is the phantastron using the type 6SA7 tube. The unit operates from a line voltage of 115 volts at 50 to 1200 cycles per second and when constructed as illustrated will weigh about 20 pounds.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 26, 1946
- Accession Number
- ADA801574
Entities
People
- R. P. Abbenhouse
Organizations
- Massachusetts Institute of Technology