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Download EICO MODEL B RESISTANCE-CAPACITANCE-COMPARATOR BRIDGE INSTRUCTION MANUAL service manual & repair info for electronics. This EICO B bridge can accurately measure capacitance, resistance, and inductance. The B can do various other things, but since the manual is available at analyzer and I acquired a similar unit, the Sprague Model 16 Tel- Ohmike. The EICO B, the resistance capacitance bridge and the . The Y cap was taken from an old SMPS – (C7 in the original schematic).

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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. For Leak testing pot P3 controls the output voltage.

If you are not familiar with electronics, do not attempt to repair! This item doesn’t belong on this page. You could suffer a fatal electrical shock! Recently I have begun what might be the start of a nostalgic journey in vacuum tubes. These free programs can be found on this page: I still have more to learn about this unit.

His family were great — his daughter and her husband were nice, sweet and patient, they showed me all his toys — Robert Merville Gale — I would like to dedicate this project in memory of this wonderful and brilliant soul. I had a hard time getting those film caps but managed to get them finally.


The power cord was changed to 3rd pin and grounded earth to chassis.

This site uses cookies. The next step was to do a complete physical inspection, look for broken parts, shorts, missing cables, broken connectors and so on. As expected, I found broken cables, joints, exposed cabling. It is a vacuum tube scope moddel I need a leak tester to check the caps in it. I was checking an electrolytic V uF cap and rand down the voltage pot from V to 0 and saw some blue flashes from inside.

You could google it to find more details.

Vintage EICO Resistance Capacitance Comparator Bridge Model 950B

The basic circuit of this unit is very simple. I checked the transformer as well in this process and saw the heater glow from both the tube and the magic eye. This unit was working when I received it. You are commenting using your WordPress.

I definitely need to get the 5W 10K wire wound pot from eBay. 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 This is how pristine it looked when I picked it up. By continuing to use this website, you agree to their use. Eicp can see the first light up, after so many years, still on 60V power. Skip to main content.


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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.

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.

As the tube heats up slowly, it should not cause any trouble even if I have a high value cap, but I wanted to play it safe and keep the surge current as low as possible to protect the rectifier tube. I am ready to head back to my TEK Project. I replaced 3 capacitors 2 didn’t.

It can kill you. The unit worked when I got it and the changes I made were for safety reasons. Do not run down the voltage fast after leak test on a high value cap.

Vintage EICO Resistance Capacitance Comparator Bridge Model B | eBay

You are commenting using your Facebook account. Remember rules for series capacitors. It seems to be one of the most popular units out there.