| Brand | EICO |
|---|---|
| Model | EICO 685 |
| Country of Origin | United States |
Check the listing for details. Vintage EICO 685 Transistor Analyzer Tested Working β Gain Meter Vintage USA. Condition: Used, Made in United States. Listed at 107.99 USD. EICO 685 Transistor Analyzer. These units were widely used for testing bipolar transistors, FETs, and other semiconductor components. Tested using a known NPN transistor (2N3904). Ideal for collectors, hobbyists, or restoration work.