One Tested 426 (26) DeForest Audion Balloon Globe Audio Receiver Radio Power Vacuum Tube. Manufacturer: DeForest. Model: 426 26. Plate type: silver. Excellent strong test results for Gm: 70. Glass: clear.
One Tested 426 (26) DeForest Audion Balloon Globe Audio Receiver Radio Power Vacuum Tube. Manufacturer: DeForest. Model: 426 26. Plate type: silver. Excellent strong test results for Gm: 70. Glass: clear.