The SECO Model 250 Transistor and Tunnel Diode Tester

This is a quite rare device I picked up on Ebay some years ago, for testing transistors and diodes, including tunnel diodes.

SECO Model 250 Transistor Tester

 SECO 250 Transistor Tester

The instructions are on a label pasted to the inside of the cover, and are unfortunately in a sorry state.

SECO 250 Instructions

Here’s a better image from a recent (2012) Ebay auction for the same type of tester:

Instructions (found elsewhere)
Instructions (found elsewhere)
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s