Listing is for one - Lot of 16 Mullard Blackburn 12AX7 - Tested 600A Some Matched Pairs.

A lot of 16 Mullard 12AX7s pulled from vintage Heathkit Op Amplifiers - OSU (light use). 

I believe these are all Blackburn factory production short plates, (confirmed by the B-date codes and I91/I63 type codes).  I did not verify every one.  All that I spot checked had the I91/63 codes.

To be fully transparent on the specs, I made a real-time video of the testing of triode 1, see video below.  These were tested on my Hickok 600A using the standard roll chart settings (not the 'Orange Dot' life test).  My tester is NOT professionally calibrated.  It has been recapped and used for many tube tests w/ no complaints.  However, your tests results may vary.  These results are considered approximates.

Quality Matches:  Tube #6 looks to be a "dead match" (2350/2350) (again, please read above).  Tube #1 and Tube #7 are perfectly matched to each other for a stereo pair (2250/2200 and 2250/2250).

A Delivery Signature will be required.  All tubes are extensively photographed, & inconspicuously marked to avoid any nonsense.  I do not accept returns so please ask questions BEFORE buying.

Sold in AS IS Condition.  No Guarantees.  No Returns.

Please see pics for the visual condition.  As with any vintage item, please expect there to be wear, scuffs/scratches, odors, discoloration, rust, dust, signs of age, etc., and though I may have gotten an item to power on, due to the age, item could fail to do so at any time.  

Pics are of actual item(s).  Item does not come with anything else, unless noted in description.  Please ask any questions before bidding/buying, thank you.

SHIPPING to the United States & internationally via ebay's International Shipping Program ONLY. 

Please note, we offer several options for shipping & on occasion, we may upgrade your shipping, at no additional cost, to ensure your item arrives as quick as possible (for example media mail to ground advantage, also USPS/UPS/Fedex are all used interchangeably).  If this is not acceptable, please send a note with your order, so we know not to upgrade.  We will never downgrade your shipping.  

Thank you & Happy Bidding/Buying!  Please visit my store for more vintage items!

Office reference: Item #26-1929