The EICO B, the resistance capacitance bridge and the . The Y cap was taken from an old SMPS – (C7 in the original schematic). Download EICO B CONSTRUCTION MANUAL. service manual & repair info for electronics experts. A quick view of the power supply schematic, shared by the Knight, Lafayette, and Like the Knight and the Lafayette, the Eico B substitutes eye-closure for.

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EICO B – Repair/Restoration – Lazy Electrons

You are commenting using your Facebook account. I checked the transformer as well in this process and saw the heater glow from both the tube and the magic eye.

You can see the first light up, after so many years, still on 60V power. Eico a This unit was working when I received it. I have recapped and redone some wiring fico retubed the unit.

No buttons to hold The think I love the most about this capacitor tester is that you don’t have to hold push buttons in to do a leakage test on electrolytic capacitors. This file is downloadable free of charge: Remember rules for series capacitors.


Vintage EICO Resistance Capacitance Comparator Bridge Model 950B

I would like to dedicate this project in memory of this wonderful and brilliant soul. Ekco I have begun what might be the start of a nostalgic journey in vacuum tubes. I replaced 3 capacitors 2 didn’t. Ever since CRTs are out most shops have it stacked somewhere in corner and the guys in the shop usually ask me to go through the section where they keep the old stuffs.

I still have more to learn about this unit. Please, do not make a copy of the downloaded manual and do not offer to sell it, just use personally to repair defective appliance!

I have 590b disclose, I learned this from U-tube videos. I bought the Eico B to play with.

I am a Electronic Tech. There is no preview for eici item! Overall a great piece of hardware! The think I love the most about this capacitor tester is that you don’t have to hold push buttons in to do a leakage test on electrolytic capacitors. I wish I had come across this valuable article before.

EICO 950B – Repair/Restoration

You need not order the exact value eicp per original spec, as it is rare. I added a line fuse and replaced the line cord with a polarized one. The unit worked when I got it and the changes I made were for safety reasons. Its mentioned in the blog, If you run down the voltage quick after leak testing, the entire capacitor will discharge through the POT and burn it.


You can write in English language into the forum not only in Hungarian! It is a vacuum tube scope and I need a leak tester to check the caps in it.

Vintage EICO Resistance Capacitance Comparator Bridge Model B | eBay

Email required Address never made public. These free programs can be found on this page: You are commenting using your WordPress. The power cord was changed to 3rd pin and grounded earth manula chassis.

In any case, if you do not find the exact value, try a combination of parallel or series caps, e. I am ordering pF, pF, 2. Eicoo luck to the repair! Most testers you dial up the test voltage, push the leakage button and wait for the eye tube to open which seems like forever.