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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EICO B – Repair/Restoration – Lazy Electrons

Jun Sat 22, 4: You may also like. Jun Sun 16, 8: I have put in a new power cord, a new y-capacitor and replaced all the electrolytic ones. Jun Tue 18, 5: You need not order the exact value as per original spec, as it is rare. I’m not sure how long the shaft is on your potentiometer but I’ve got this pointer in my junk box if you’re interested. Jun Tue 18, 4: The manual that I printed for my unit has a copyright date on it.

After verifying the schematics, the first test was the tube test, with just the heater power. The only draw back is that the unit doesn’t have a volt meter so you should check the voltage control using a vom as I first did to see if the marks on the voltage scale are close. Exceeds expectations in every detail – restoration beyond actual eras original accuracy – thx u. But was lucky it was just the pot. But remember, a very high value cap can load and burn the rectifier tube. Here is the long pointer knob on a I also still need to clean off the remains of the protective film over the front panel.

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Antique Radio Forums • View topic – Eico B resistance/capacitance/comparator bridge

It is a vacuum tube scope and I need a leak tester to check the caps in it. Mine developed an eicl short in the value potentiometer and took out a winding of the transformer. My main reason for getting this was to be able to check leakage at high voltages; which, is something most modern equipment can’t do. You just need to keep the ration capacitance ratio the same.

Eico: eico model 950b bridge construction

Especially the V 0. I was blown away by how well kept it was, and went there to pick it up and was amazed to see the amount of electronic instruments he had — collections all the way from I 90b I had come across this valuable article before.

I’ve checked with Mouser, Newark, Digikey, and Allied.

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. This site uses cookies.

As expected, I found broken cables, joints, exposed cabling.

Most models use the magic eye tube for both Leakage testing and component value testing. Eeico was added to these testers years ago before high efficiency electrolytics came around. Heathkit C-3 light color scheme. Most testers you dial up the test voltage, push the leakage button and wait for the eye tube to open which seems like forever. During component value testing, the magic eye tube serves as the null-indicator. Jun Tue 18, If the shadow does not open very far, or it appears blurry or out of focus, then you need to start changing the bridge caps out.

I have to disclose, I learned this from U-tube videos. Jun Sun 16, 5: Ensure euco are skilled enough to do this. Any other suggested places to look? Fill in your details below or click an icon to log in: And here you go, this is 905b it looked like on the inside. This website discusses repair of electronic items.


It seems to be one of the most popular units out there. Even though the pointer that’s on it works, I’d like to replace it with the correct one. While I wait for my precision caps to arrive, I can finish rest of the tasks, 95b the last few 0.

This item doesn’t belong on this page. The EICO B, the resistance capacitance bridge and the capacitor leak tester — I do have other tiny things that can measure capacitance, but nothing compares to this one, or the Heathkit or a high voltage DC capacitor leak tester.

The voltage equalizing resistors across the seriesed replacement electrolytics may be disturbing 905b DC voltages. I bought one several years ago from and old radio shop. Often Eico custom made the face plates with the name of the school. 90b

Heathkit C-3 dark color scheme. The bridge is balanced when the maximum dark area is indicated, and you can then read elco value of your component on the faceplate scale.

Skip to main content. I use my B for entertainment after a re-cap project. Jun Mon 17, 8: As the tube heats up slowly, it should not cause any trouble even if I have a high ejco cap, but I wanted to play it safe and keep the surge current as low as possible to protect the rectifier tube.

I replaced 3 capacitors 2 didn’t.