Description:

Lot of 5 vintage LH0070-2H precision voltage reference ICs in 3-lead TO-39 metal can package. Markings visible include LH0070-2H and code/lot markings (including B9018 as shown by seller notes/marking interpretation). These are specialized precision 10V reference devices used in instrumentation, calibration-related circuits, precision regulators, and legacy analog systems. Genuine older metal-can precision references are desirable for restoration, repair, and specialty analog projects. Please review photos carefully for exact markings, lead condition, and package condition before listing as NOS vs used/pulled.

Modern uses:

- Repair/restoration of precision analog instruments and legacy test equipment

- Precision regulator/reference replacement in older industrial electronics

- Calibration/source reference projects (10V reference circuits)

- DIY metrology/bench reference experiments (with proper circuit design)

- Spare stock for vintage National Semiconductor / LH0070-based designs

Compatibility note:

LH0070-2H is a precision fixed 10V voltage reference (series type) in TO-39-3 metal can package. Verify exact pinout, required supply voltage range, output current/load requirements, tolerance grade, and thermal/mechanical fit before substitution. Do not assume compatibility with generic 3-pin regulators or shunt references (e.g., LM317/TL431 families) without checking datasheets and circuit topology.