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Bk 747


Pair 1960S RCA 12AX7A Tubes B&K 747b Test Strong ECC83

$16.75


Pair Very Rare NOS Marconi 12AX7/ECC83 Tubes Made In Italy B&K 747 Tested Good

$40.00


Amperex /ELMenco 12AT7 tube - BK 747 Tested

$30.00


Pair Sylvania 6SJ7 tubes/metal based - BK 747 Tested

$34.99


NOS NIB GE 6X4 Rectifier tube - BK 747 Tested

$15.00


2 RCA 6H6 metal tubes - BK 747 Tested  

$9.99


GE 5U4GB rectifier tube - BK 747 tested 

$14.99


USED 6JE6B G.E. USA Beam Pentode Dual Side Getter B&K747 gm=105

$15.00


Ultimate B&K 747 / 747B Tube Tester Chart & Manual 99pp new remastered

$11.99


B&K Precision Model 747 Tube Tester, with Data Book, Tested against Hickok 6000A

$599.95


USED 6LB6 Sylvania USA Beam Power Tube 3 Halo Getters B&K747 Reads 119

$16.00


NOS RCA 30KD6 Horizontal Sweep Tube USA B&K747 Reading 101

$12.00


USED RCA 6JE6C Beam Pentode Vacuum Tube USA B&K747 Reads 122

$10.00


Qty(1) RCA 6DS4 Nuvistor NOS USA B&K747 Tested

$10.00


USED Sylvania USA 6L6WGB Audio Power Pentode B&K747

$15.00


Qty(1) GE 8156 Compactron Beam Pentode B&K 747 Reading 117 NOS USA

$6.00


Qty (1) NOS 12DT8 RCA Twin Triode Vacuum Tube D-Getter Black Plates B

$8.50


USED Sylvania 12AT7WA twin triode USA USAF 3-Mica B&K 747 gm: 100/94

$12.00


USED Sylvania 31JS6C Beam Power Tube Zenith Logo B&K747 Reads 118

$10.00


NOS Raytheon 6JE6A USA Beam Power Vacuum Tube B&K747 Reads 98

$10.00


GE 6136 Black Plate Vacuum Tubes Qty 7 Strong Testing on B&K 747

$30.00


AMC 8233 E55C Gold Pin Vacuum Tube Measured 85% on B&K 747 NOS?

$40.00


AMPEREX ORANGE, ECF802 6JW8, GRAY PLT, HALO GTR, FRANCE,TESTED B

$35.00


GE 24LQ6 24JE6A VACUUM TUBE NOS NIB ORIGINAL CRISP BOX TEST 112 ON B

$9.88


3 GE 12AU6 TUBES PASSING ON B&K 747

$15.00


GE 6KD6 Ham Radio SWEEPS Vacuum Tube Tested On B&K 747 #H.6228

$19.95


vintage Valvo ECL86 6GW8 Power Tubes German made, Tested B&K 747B

$23.50


2 NOS MATCHED SETS LORENZ PL82 16A5 PENTODES, TESTED B&K 747B

$35.00


GE and Sylvania 6JS6C Vacuum Tubes Measured 72% and 84% on B&K 747

$42.00


Quantity Two 6JS6 (one B one C) Vacuum Tubes B&K 747 Measured RCA Sylvania

$56.00


GE 6AU6 Gray Plate Vacuum Tubes Qty 9 Strong Testing on B&K 747

$30.00


VINTAGE PAIR OF 8077 AUDIO TUBES BOTH PASS ON B&K 747

$9.99


RCA JAN 6AC7 VACUUM TUBE DATE MATCH PAIR 1944 TESTED ON CALIBRATED B

$12.84


Amperex 12AT7 Bugle Boy Tested 60/60 on B&K 747

$24.99


PAIR NOS SYLVANIA 12AU7A ECC82 Preamp VACUUM TUBES Tested On BK 747 #10.5342

$23.95


Hammond 12AU7A tube Checked on b&k747

$11.99


RCA 6AC7 VACUUM TUBE DATE MATCH PAIR 1957 TESTED ON CALIBRATED B

$12.84