4 US-Made 6AH4 6AH4GT Vacuum Tubes Lot Of Four 10GK6 Nonal These tubes have gray coatings

These tubes have gray coatings from the very tops to within 12 MM of the bases

It measured 96/78

They are microphonic and are fine in the preamp stage of my MP-301 and other gentle environments

Nice dynamic range as well

70/79 and 75/76 where minimum (65%) is 50/50 and 100% is 77/77

4 US-Made 6AH4 6AH4GT Vacuum Tubes Lot Of Four 10GK6 Nonal These tubes have gray coatingsThese four US made 6AH4GT tubes tested as follows on our Paul Hart calibrated TV7 U: 50, 54, 66 and 74 where minimum (65%) is 57. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE