This is an EICO Model 666 Dynamic Conductance Tube and Transistor Tester that has been restored, calibrated, and verified working.

This was originally a kit build. It has been fully reconditioned with 20 documented repairs and replacements including new capacitors, resistors, buttons, switches, transistor socket, panel screws, and case handle.

The line adjust, plate control, and all switches were cleaned and treated. Meter protection diodes were added. The meter face was polished with Novus plastic polish. The metal cabinet was repainted.

Calibration was performed per the established EICO 666 procedure using a Fluke 187. A detailed qualification sheet with serial number 20375 is included, documenting filament voltage measurements across all ranges and internal voltage readings, all within spec.

Quality tests were performed using known reference tubes including a 6L6, 6X4, and 12AZ7. A 12AT7 is plugged in and shown powered in the photos.

The roll chart drum is damaged as noted in the documentation. While it is working I would recommend getting a paper tube data manual as a back up.

Item will be packed carefully with heavy duty bubble wrap and a sturdy box. Ships within one business day of cleared payment.

Please feel free to ask any questions you may have. I will often reply quickly, unless foraging for mushrooms :)

Thanks