2 Vintage Marconi Canada made GE Branded Black Plate 6SN7GTB Vacuum tubes!

Please see the detailed pictures


3 Vintage Marconi Canada made 6SN7GTB Vacuum tubes..

Tubes all share the same construction and are made by marconi Canada and branded with the GE Branding.

Tubes feature black plates with bottom D getter. 

Tubes each have current matched balanced plates. Perfect for Hifi. 

Tubes have been tested on a Calibrated Hickok TV7 tube tester and test as follows:

Tube1 : 105.5/104.4

Tube2 : 98.8/98.2

Minimum good value on a TV7 tester for a 6SN7 tube is 50. The tubes test within or near the NOS range.

Tubes are guaranteed to be in good working order upon delivery. If a tube ends up bad within 1 week of delivery just ship it back for a full refund on the bad tube minus shipping costs.

  See pictures for details. 

If you have any questions please email.

I will ship worldwide.

Buyer to pay all shipping costs including brokerage and taxes if any.


I do combine shipping to save you costs!

See my other auctions for more vintage audio gear!

Local pickup in maple ridge BC is also available.

GOOD LUCK!!!!!!!