Systron Donner Frequency Counter

Systron donner frequency counter from 1973 with nixie tube display.

Systron donner frequency counter. After a preset period known as the gate time 1 second for example the value in the counter is. Frequency counters email to friends share on facebook opens in a new window or tab share on twitter opens in a new window or tab share on pinterest opens in a new window or tab add to watchlist. Mar mon 14 2005 11 17 am. Jan thu 01 1970 1 00 am posts.

60 00 shipping. Systron donner frequency counter from 1973 with nixie tube display the early nixie displays were made by a small vacuum tube manufacturer called haydu brothers laboratories and introduced in 1955 5 by burroughs corporation who purchased haydu. 41 91 0 bids 102 60 shipping. This is a systron donner model 114 frequency counter.

Systron donner 6152 freq counter timer 8 digit nixie display. Good used condition i can t find the plug so can t confirm that it works. Most frequency counters work by using a counter which accumulates the number of events occurring within a specific period of time. Systron donner 6241a frequency counter 20hz 100 mhz adjustable sensitivity.

Component datecodes are from the late 60s to early 70s. Basic comparison checks with similar test equipment confirms unit is still. If the input is 50 ohms sometimes you can get away with changing this resistor to 100k or. Worked when it was retired.

Systron donner frequency counter repairs replaced 7441 nixie tube driver chip and replaced blown diodes on input board. Heathkit frequency counter im 4120. Systron donner frequency counter. It uses nixie tubes and ttl logic to implement the core functionality.

Find great deals on ebay for systron donner counter. Albuquerque nm 87123 hi grampibear br there is one thing you might try that is not guaranteed to work.