I’m dismantling my main system and downsizing. All tubes were purchased by me from reputable dealers and are NOS except for the Tungsram.
Date corrected on the short plate Mullard CV4003 from 1980s to Jan. 1973
Prices include PayPal and shipping to the lower 48 (usually by Priority Mail). All positive rating of 402 on A'gon. under "rpf".
Radiotechnique 6189/ECC82/12AU7 (1965)
DAC/Driver grade.
Matched pairs in plastic bags (2 pairs available) - $80/pair


Radiotechnique 6189/ECC82/12AU7 (1965) Pre-amp grade (or better?).
Matched pairs in cigar rolls - $150/pair - SOLD


The Radiotechnique are the best all around 12AU7/ECC82 type out of the almost
two dozen I’ve heard.
Mullard CV4003/ECC82/12AU7 box plate Platinum Grade - 1 single (beat up box:
this is the one I kept opening up to look at to learn about tubes

) - $75 SOLD
Mullard CV4003/12AU7
late (early ‘80s) production short plates. Mistook
the date codes: they are actually Mitchum production from 1973 - "R3A1"
Pre-amp grade (or better?). Very similar sound to the box plates but a touch tighter
and punchier. Two matched pairs - $125/pair - SOLD
Tungsram (Zyirex) ECC82/12AU7 Pre-amp grade. Lightly used ~150 hours.
Matched pair - $80/pair