1 RARE Raytheon Sample 12DT7 12AX7 Black Plate Vacuum Tube Tested On TV - 7

Tube test Value -  42/42 

Minimum tube value - 32/32 

Extremely Rare First Edition Engineering Sample of the 12DT7, Premium 12AX7 Substitute. 

This tube has a Black plate and top O getter. 

This tube was tested on my newly calibrated TV - 7 tube tester. This tester also is used in conjunction with a variac to maintain test results accuracy and consistency. The tester was calibrated by Mr. Paul Hart.

All tubes Passed The short test ,gas test, filament test and life test.

I can provide documentation that the tube tester was calibrated upon request.

I will always list original photos of actual item you are receiving

I will ship within 24 hours of payment received

Any questions please send me a message

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