- Image 64 of 95
Image Description
an old radio valve amplifier, these glass enclosed devices were used before the advent of the bipolar transistor and other modern semiconductor amplifiers
- Keywords
- closeup details mechanical mechanics near object side view technology tube value thermionic
- Resolution:
- 2350 x 3500
- File size:
- 1035 kB
-
License Details
Creative Commons Attribution 4.0 License
This image must be attributed - see license details -
Embed this Image:
Related FREE Electrical & Electronic Images
Related Science Images at iStock
