Path: /eico/b/. This is the BAMA archive. These manuals are available for download and free of charge. I am now accepting new manuals for inclusion in this. DESCRIPTION. Your new EICO Model Resistance-Capacitance-. Comparator Bridge, was designed to measure practically all resistances and capacitances. The article currently covers the EICO series, PACO C, Knight KG, Heathkit C-2 and C-3, etc. (More models will be added on an ongoing basis as I.

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Posted in Test Equipment on August 23rd, This article discusses repair and calibration information for a number of vintage capacitor testers that all use the same fundamental test circuit.

EICO B – Repair/Restoration – Lazy Electrons

More models will be added on an ongoing basis as I find the time. All of these models are almost identical in functionality and circuitry.


You get the entire set of 3 reference caps 1 of pf, 1 of 0. Ejco NEED precision reference capacitors to achieve an accurate capacitor tester.

Extreme caution must be followed with any vintage capacitor tester because very high voltages are present during repair and while operating. They should only be used by knowledgeable technicians. These models use a balanced bridge that measures capacitance from 10mmf up to mf and resistance from 0.

During component value testing, the magic eye tube serves as the null-indicator. When the fico is far from balanced, the target area of the magic eye tube glows completely closed green, and in fact overlaps.

EICO 950B – Repair/Restoration

As the pointer dial approaches balance point, first the overlapping disappears and eventually the entire target area of the eye tube is completely open dark.

950n bridge is balanced when the maximum dark area is indicated, and you can then read the value of your component on the faceplate scale. Most models use the magic eye tube for both Leakage testing and component value testing.


Any technician who repairs vintage tube equipment such as tube amps, antique radios, vintage jukeboxes will find that a quality capacitor tester is a useful test instrument.

Other values of precision capacitors are available by request. Heathkit C-3 dark color scheme. Heathkit C-3 light color scheme.

Eico: eico model 950b bridge construction

NRI Professional model This website discusses repair of electronic items. Electrical voltages are present and represent eixo danger. Repairs should only be attempted by a qualified technician.

We do not provide free personalized troubleshooting. All content is the opinion of the author and not intended as advice.

Author: admin