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#1
02-10-2025, 05:49 PM
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Bought an Eico 944 can't get it to work
Hey guys I recently bought a Simpson 260 and an Eico 944 from someone who is cleaning out his dad's basement. If the batteries in the Simpson are any kind of indication nothing has been used since the very early 90s probably around 90 or 91 anyway I recapped the Eico and tried turning it on but the gauge did not move. Then I metered between the green and black terminals but only got 24 volts. I tried removing the two leads off that Transformer to isolate it from the rest of the tester but still only got 24 volts. According to the schematic I should have 115 coming in on the red and blue which I do, and 100 coming out on the green and black. Is it possible that this Transformer is no good? If so what kind of a transformer can I sub it with? I put the schematic below.
Last edited by Aperna1985; 02-11-2025 at 04:39 AM. 
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#2
02-11-2025, 07:33 AM
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There's not much to the circuit in one of these. Seems like the 6K6 isn't oscillating. It's possible that the transformer could be shot. Have you tried the calibration using potentiometer R1 under the Maintenance section of the manual?
__________________
Sean - WØKPX
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#3
02-11-2025, 04:02 PM
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Quote:
Yes I did and it had no effect. That's what made me start digging into it trying to find why I had a lack of voltage. I'm going to look around and see if I have a 6k6 somewhere, the one that's in there tested good but who knows.
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#4
02-17-2025, 02:51 PM
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When I worked on mine it seemed pretty simple. I can't remember off hand what I done to it as it must have been 15 years ago. (Damn time flies...)
It does sound like the tube. Is your filiment voltage good? Also check that the meter movement is not sticking. When they're running they work really well.
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Linear Mode
