Back in stock (VERY LIMITED AVAILABILITY — only 2 available). Voltage pot for Sprague TO-3 cap tester. NOS NIB USA. Get one while you can. At least 1 of them is available as long as this notice is still up. If for some reason you have problem using the Paypal button, email me. This post […]
Sprague TO-3 voltage pots in stock Read More »
This article discusses repair and calibration of the Sprague model TO-3 Tel-Ohmike Resistor-Condenser Analyzer. Serious electrical voltages are present, repairs should only be attempted by a qualified technician. Copyrighted by Bob Putnak, all rights reserved. Model TO-3 Tel-Ohmike “Capacitor Tester” is based on the older Sprague design.It is a balanced-bridge design with the following specifications:
Sprague TO-3 Tel-Ohmike calibration Read More »
©2009, All rights reserved. The article will discuss a cheap and easy way to test panel meters. The meter in your tube tester is an example of a panel meter. Occasionally you see flaky meter operation and suspect that the panel meter may be defective. Most techs know that it may not be safe to
Testing panel meters Read More »
(©2008 Bob Putnak, all rights reserved.) This article discusses repair and calibration information for a number of vintage capacitor testers that all use the same fundamental test circuit. The article currently covers the EICO 950-series, PACO C-20, Knight KG-670, Heathkit C-2 and C-3, etc. (More models will be added on an ongoing basis as I
Capacitor Tester repair-calibration Read More »
