EICO 625 TUBE TESTER
The EICO 625 is a popular classic tube tester. The tester can usually be purcahsed from eBay for about $75US. The EICO 625 is an emission tester which gives you a basic idea of what condition the tube is in. The 625 will not measure transconductance, so you will not be able to use it to "match" tubes. However, it is still a very useful piece of test equipment.
Resources
- EICO 625 Instruction Manual - (PDF 1.6MB)