Description: Pair 6J4P = 2 tubes perfect matched, NOS, made December 1974 in soviet NEVZ plant, OTK stamp on tubes, tested and matched using professional tube testing system Roetest V10. Tubes are in original factory bulk box 100 items. What means diamond matched? Usually we see tubes matched by Ip and gm measured in a single operating point, with a tolerance of selection 0%-15%, divided in 3 classes, silver 10-15%, gold 5%-10%, platinum <5%.Diamond matched means tubes with identical parameters in about 50 operating point, we see that when we look at overlapped curves of tubes and see that they have the identical lines from 0 to 20mA. All tests done for these tubes, short, leaks, vacuum, grid secondary emission etc., automatically done by Roetest.6J4P is equivalent and direct replaceable with 6AU6, 6136, EF94, E94F.If 2 pairs are bought we select them and deliver a diamond matched quad.Price is for a pair = 2 tubes matched as described above, with results from tests messaged or on label with tubes, without individual boxes, very safe packaged. Shipping cost being about the same with tubes' cost, look at our other listings and buy more tubes with combined shipping, we automatically combine it when is the case of same buyer/same day and refund the surplus.We ship in max. 3 days after payment, usually next day, priority airmail with tracking number.Usual shipping time is 10 days for Europe and 15 days for US but could be 5 days faster or slower, very rare outside this range.
Price: 17.5 USD
Location: Bucharest
End Time: 2024-10-10T17:37:56.000Z
Shipping Cost: 12.8 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 14 Days
Refund will be given as: Money Back
Brand: NEVZ
Type: NOS Tube
Model: 6J4P
Country/Region of Manufacture: Russian Federation
