Vintage NOS Matched Pair I63 Blackburn Mullard Gt. Britain ECC83 / 12AX7 Gray

Vintage NOS Matched Pair I63 Blackburn Mullard Gt. Britain ECC83 / 12AX7 Gray (image 1/1)
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Matched, Tested & Guaranteed Vacuum Tubes All tubes are guaranteed to be 100% as described or your money back. All tubes have been tested for mutual transconductance, shorts, leaks, gas and noise on my calibrated Hickok TV-7/U. Any pair of quad described as matched means that the tubes will have the same exact construction and will test within a close range of each other for Mutual Transconductance. The last criteria is date codes, which I do match when possible. Brand: Mullard Type: ECC83 / 12AX7 Number of Tubes: Matched Pair Plate Construction: Gray Getter Construction: Top O Country: Gt. Britain Visible Date Codes: I63 B5J4 & I63 B6H3 Notes: I63 Blackburn Mutual Trans Test Data: 55/56 & 55/53 where the minimum good reading is 32/32 and the New Old Stock (NOS) reading is 48/48. Shipping I DO COMBINE SHIPPING!!! All domestic orders will be shipped by either USPS First Class Mail or Priority mail. Typically tubes are shipped with in 2 BUSINESS days. Transit time usually takes 2-5 business days. International buyers please see below. For my domestic (USA) buyers shipping for the first tube will cost $4.99 + $1.00 for each additional tube. For International buyers from Canada/Mexico , shipping will cost $5.99 + 1.50 for each additional tube.For International buyers from everywhere else , shipping will cost $7.99 + $1.50 for each additional read more
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