RCA 6AS7G 6SN7GT tubes for Dark Voice/BottleHead Crack/Woo/Eufonika/Xduoo amps

Excellent vintage RCA 6AS7G and RCA 6SN7GT NOS tubes for tube amplifiers such as Dark Voice 336SE, BottleHead Crack, Eufonika H5, Xduoo TA-26, Woo Audio, Feliks Audio, and so on. NOS RCA tubes are great sounding tubes, famous for their smooth mids for vocals. Tubes are tested on our military TV-7D/U mutual conductance (Gm) tube tester, which was recently restored and calibrated by Dan Nelson – the King of TV-7 series tube tester restoration and calibration. TV-7D/U test results (also refer to photos for measurements): RCA 6SN7GT Gm: 108 / 100 (minimum good = 50) RCA 6AS7G Gm: 90 / 90 (minimum good = 36) * Minimum good for 6SN7GT tubes on TV-7D/U is 50 (65% of NOS), so Below 50 = Low testing tubes 50 – 77 = Good tubes 77 and above = NOS tubes * Minimum good for 6AS7G tubes on TV-7D/U is 36 (65% of NOS), so Below 36 = Low testing tubes 36 – 55 = Good tubes 55 and above = NOS tubes So these two tubes are very strong, above the NOS level. No shorts, no leakage, no gas. Tubes also have been sound-tested on our modded Dark Voice 336SE headphone amplifier. They sound fantastic, no microphonics, no hissing / crackling / or other noises. Background is dead quiet. Tubes will come with generic white tube boxes. Shipping: Tubes will be shipped by Canada Post Small Packet by Air, unless otherwise specified. It normally takes 5 – 10 days to get to US addresses (2 days within Canada, 1 – 3 days to cross the border, and 2 – 5 days within US via USPS Priority Mail). Shipping fee to Canadian addresses is US$15. Combined Shipping is welcome, if multiple items are purchased. If items have been paid separately, we will automatically refund any savings from Combined Shipping. International Buyers – Please Note: Currently, these tubes are ONLY available to folks in USA, Canada, UK, Ireland, Germany, Austria, France, Switzerland, Belgium, Netherlands, Sweden, Norway, Denmark, Iceland, Finland, Australia, New Zealand, and Japan. Folks in other countries please inquire first before hitting the BUY button. No shipping to China, India, Indonesia, Vietnam, Italy, Russia, and so on due to lots of reports on lost packages at customs. Return Policies: Returns will be accepted within 14 days of delivery, provided tubes are in their original conditions – no damages to tubes, factory tube boxes (if there are), or print on tubes; no drops in tube mutual conductance (to prevent abuse); and no removal of our unique stamp on tube glass. Buyer pays for the return shipping cost. Our purpose here is to sell tubes instead of loaning tubes for rolling. To discourage tube trial there will be a 10% restocking fee. Serious buyer only! Please contact us first before initiating a return to discuss concerns and solutions. All our tubes will be imprinted with our unique stamp on the glass. Please do NOT remove the stamp, or else tubes will not be considered ours and return will be denied.