Excellent matching pair, both February 1958.

MC5 <8B

MC5 <8B 

Test 1380/1400 & 1400/1400 for gm where 875 is good in a calibrated Hickok 539-B tester.

Listening tested for excessive noise and microphonics in a Maxi-preamp 2 noise tester.

All tubes are guaranteed good or may be returned.  

Shipping includes insurance.

Please see our other items for more vintage tubes & audio.

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We do not change values for customs.  

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