Sylvania VT-231 6SN7GT 6SN7 Mil-Spec Tubes, Matched Pair, Tested

Hello – I have a closely matched pair of Sylvania Mil-spec VT-231 6SN7GT Bad Boy audio tubes for sale.

There is no difference between a VT-231 and a mil-spec marked 6SN7GT. These tubes were manufactured for the US Navy and have undergone more stringent testing than the standard 6SN7. Some were dually marked and some were not.

These tubes have 2 hole black "T" plates and foil getters in the bases of the tubes. They were made in the late 1940's.

TV-7/B test results: 105/100 and 105/105. Minimum is 50.

They have also been checked for noise and microphonics in the phono stage of my DIY pre-amp and are dead quiet.

All tubes are tested on my calibrated TV-7/B or on my calibrated Hickok 539C. All of these tubes have been tested for transconductance, shorts, gas, leakage and life. All tubes meet or exceed manufacturer published specifications of transconductance (Gm) for the specified tube type. All tests are tested twice – prior to the listing and prior to shipping.

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If you don’t see the tubes you are looking for, please contact me.

Be sure and click on the “other items’ link for more tubes.

I will ship international.

Shipping is $5 in the USA. Canadian shipping is $18.00 and international shipping by USPS Priority Mail is $52.00.

Your tubes will be carefully packed.

No charge for paypal.

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