ONE new in box RFT EF12K (low microphonic version of ef12). Computerized tested on etracer tube tester. This is new in box. I only open to test. new in box.
ONE RFT EF12. Computerized tested on etracer tube tester. Tests slightly used @ 80% gm 80% mA.
ONE new in box VEB RFT EF12. Computerized tested on etracer tube tester. Made in Germany.
FUNKWERK logo on tube. ONE RFT EF12. Computerized tested on etracer tube tester. "Gut" written on tube = good in German.
ONE new in box RFT EF12K (low microphonic version of ef12). Computerized tested on etracer tube tester. This was sealed new in box. I only open to test. new in box.