5 NOS Engraved Base NU National Union Type 57 Radio Tubes.
Item History & Price
| Reference Number: Avaluer:4871236 |
5 NOS engraved base NU National Union tested Type 57 Radio tubes. They were tested on a TV-7. The min is 31.
Here are the results.
1. engraved base 54
2. printed base 50
3. printed base 50
4. printed b2se 50
5. printed base 52As you can see these tubes and boxes have been around for a while and the boxes have some damage. Cleaning the tubes is being left to the buyer since often cleaning the tubes also removes labeling....
Test results are also written on the tubes. These can be easily removed with a moist paper towel.
Here are the results.
1. engraved base 54
2. printed base 50
3. printed base 50
4. printed b2se 50
5. printed base 52As you can see these tubes and boxes have been around for a while and the boxes have some damage. Cleaning the tubes is being left to the buyer since often cleaning the tubes also removes labeling....
Test results are also written on the tubes. These can be easily removed with a moist paper towel.
