Specifications
- Measuring ranges
- 30 V, 1 A
- Accuracy
- load 0.01% + 4 mV; mains 0.01% + 2 mV; ripple 2 mVpp
- Construction
- silicon semiconductors, operational amplifiers
- Power supply
- 220 V +10% / −15%, 50/60 Hz
- Power consumption
- max 90 VA
- Dimensions
- 112 × 220 × 325 mm (W × H × D)
- Weight
- 7 kg
Description
The I4108 is a DC voltage source of 30 V and 1 A, made by IEMI in Bucharest [1]. IEMI’s production table lists 2,697 units made in 1977–1985 [1].
IEMI’s price list, which describes it as a 40 V, 1 A source, gives 6,900 lei, set in 1982 [2].
Annex III.2.14 says it supplied linear or logic circuits in full safety, with crowbar overvoltage protection and current protection by passing to constant-current operation, shown by two LEDs (constant voltage or constant current); it was built in the 0.01% stability class with silicon semiconductors and operational amplifiers and gave 0–30 V at 0.05–1 A, which agrees with the 30 V of the production table rather than the 40 V of the price list [3].
Gallery
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Schematics
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Documents
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References
- [1]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, sections III.2 „Producția IEMI” and III.3 „Comentarii tehnico-economice”, pp. 302–317, and annex III.2.3 „Producția IEMI – aparate electronice de măsură și industriale”, pp. 383–386
- [2]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, annex III.2.5 „Lista cu prețurile produselor – IEMI”, pp. 393–396
- [3]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, annex III.2.14 „Surse de alimentare”, pp. 674–677