[1BionicEar]

Quote from a popular online tube retailer:

"A really fine blackplate from the 1950s, many audiophiles feel these outperform most of the other NOS 12AU7 tubes. Ranked on par with the European brands!"

I have 4 matched pairs plus a quad of 1950s RCA 5963 12AU7 double mica blackplate tubes from the 1950s for sale.

Pair 1 Good Hewlett Packard logos with 1959 dates. THESE ARE GRAY PLATES. Tested 91/91 and 91/91 where 70 is the minimum score. $30 SOLD

Pair 2 Partial logos with fat/wide D getters. Tested 91/90 and 90/90 where 70 is the minimum good score $30

Pair 3 Partial logos with foil D or flat bar D getters. Tested 87/88 and 89/90 where 70 is the minimum good score $25

Pair 4 No logos with foil D or flat bar D getters. Tested 89/89 and 90/91 where 70 is the minimum good score. $20 SOLD

Quad No logos with foil D or flat bar D getters. Tested 88/88 89/88 87/88 and 85/86 where 70 is the minimum good score. Includes 3 old 5963 boxes. 2 GE 1 RCA. Boxes are rough. $55

No PayPal fees and $3 USPS 1st Class shipping to USA.

Please see my other listings. I will combine shipping and also consider discounts for purchase of multiple items at the same time.

Feel free to ask questions.

Thanks for looking.

[1BionicEar]

Pairs 1 and 4 are SOLD!