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Brand New Tung-Sol Reissue 7581A KT66 Current Matched Quad (4) Vacuum Tubes
$204.70

Brand New Tung-Sol Reissue 7581A KT66 Current Matched Quad (4) Vacuum Tubes

Matched Quad Tube Amp Doctor TAD KT66-STR Genalex Tube Remake 6L6 QUAD II MC-240
$199.00

Matched Quad Tube Amp Doctor TAD KT66-STR Genalex Tube Remake 6L6 QUAD II MC-240

PLATINUM Matched Quad NEW Genalex Gold Lion KT66 tubes - Russia
$239.99

PLATINUM Matched Quad NEW Genalex Gold Lion KT66 tubes - Russia

New ListingTYPE KT-66 BEAM TETRODE TUBES, LOT OF 3, GENALEX AND MULLARD, USED - TESTED
$13.00

New ListingTYPE KT-66 BEAM TETRODE TUBES, LOT OF 3, GENALEX AND MULLARD, USED - TESTED

Radio Tubes KT66 KT-66 Genalex UK Original MK10 Test 8500 8500 Matched Pair
$295.00

Radio Tubes KT66 KT-66 Genalex UK Original MK10 Test 8500 8500 Matched Pair

GENERAL ELECTRIC GE 7581A/KT66 PAIR TEST STRONG Made In USA SUPERB!
$144.50

GENERAL ELECTRIC GE 7581A/KT66 PAIR TEST STRONG Made In USA SUPERB!

1954 Genalex KT66 Grey Glass Matching Pair Output Tubes Marconi Valve
$400.00

1954 Genalex KT66 Grey Glass Matching Pair Output Tubes Marconi Valve

1953 Genalex KT66 Grey Glass Matching Pair Output Tubes Marconi Valve
$350.00

1953 Genalex KT66 Grey Glass Matching Pair Output Tubes Marconi Valve

PSVANE ART KT66-TIII KT66-T3 Audio Vacuum Tubes Hifi Audio DIY New Matched Pair
$259.00

PSVANE ART KT66-TIII KT66-T3 Audio Vacuum Tubes Hifi Audio DIY New Matched Pair

Brand New Tung-Sol Reissue 7581A KT66 Current Matched Octet (8) Vacuum Tubes
$412.94

Brand New Tung-Sol Reissue 7581A KT66 Current Matched Octet (8) Vacuum Tubes

4pcs PSVANE UK-KT88 Vacuum Tube Replaces EL34 KT66 6550 KT88 KT120 KT100 Matched
$302.68

4pcs PSVANE UK-KT88 Vacuum Tube Replaces EL34 KT66 6550 KT88 KT120 KT100 Matched

Matched Quad Psvane KT88-PT Vacuum Tube Electron Valve Replace 6440 KT100 KT66
$218.96

Matched Quad Psvane KT88-PT Vacuum Tube Electron Valve Replace 6440 KT100 KT66

Genalex Gold Lion KT66 Power Tubes - Matched Quartet (2-pack) Bundle
$531.98

Genalex Gold Lion KT66 Power Tubes - Matched Quartet (2-pack) Bundle

Matched 1pair PSVANE KT66GC KT66GE Copy UK GEC KT66 Replace KT88 EL34 6L6 KT77
$326.60

Matched 1pair PSVANE KT66GC KT66GE Copy UK GEC KT66 Replace KT88 EL34 6L6 KT77

Matched 1pair PSVANE ART 6CA7 Vacuum Tube Upgrade EL34 EL34C EL34B 6P3P KT66 6V6
$129.00

Matched 1pair PSVANE ART 6CA7 Vacuum Tube Upgrade EL34 EL34C EL34B 6P3P KT66 6V6

Genalex Gold Lion KT-66 Power Tubes Matched Pair
$142.99

Genalex Gold Lion KT-66 Power Tubes Matched Pair

Factory Platinum Matched Pair Genalex Gold Lion KT66 tubes, BRAND NEW in Box !
$119.54

Factory Platinum Matched Pair Genalex Gold Lion KT66 tubes, BRAND NEW in Box !

KT66 VALVE
$156.26

KT66 VALVE

PAIR GE (Dumont Label) 7581A KT66 6L6CC Tubes SideGetter Hickok Tested NOS NIB👑
$249.99

PAIR GE (Dumont Label) 7581A KT66 6L6CC Tubes SideGetter Hickok Tested NOS NIB👑

KT66 OSRAM black coated made in England tested Hickok TV7 NOS
$189.00

KT66 OSRAM black coated made in England tested Hickok TV7 NOS

NOS Matched PAIR Baldwin 6L6GB 6L6 KT66 Black Plates Double D Getter
$315.00

NOS Matched PAIR Baldwin 6L6GB 6L6 KT66 Black Plates Double D Getter

MATCH PAIR 6L6G / KT66 350B kENRAD BLACK GLASS TUBES LARGE FOIL GETTERS USA NICE
$180.00

MATCH PAIR 6L6G / KT66 350B kENRAD BLACK GLASS TUBES LARGE FOIL GETTERS USA NICE

Genalex KT66 Cracked Base Tested Good Tube
$78.45

Genalex KT66 Cracked Base Tested Good Tube

Factory Platinum Matched Quad Genalex Gold Lion KT66 tubes, BRAND NEW in Box !
$251.71

Factory Platinum Matched Quad Genalex Gold Lion KT66 tubes, BRAND NEW in Box !

PAIR OF NP GENELEX GOLD LION KT66. PLATE CURRENTS 33/37 MATCHED GM
$89.95

PAIR OF NP GENELEX GOLD LION KT66. PLATE CURRENTS 33/37 MATCHED GM

MATCHED NOS PAIR RCA 6L6GC KT66 TUBES DOUBLE GETTER USA MADE VINTAGE MATCH CODES
$180.00

MATCHED NOS PAIR RCA 6L6GC KT66 TUBES DOUBLE GETTER USA MADE VINTAGE MATCH CODES

Strong Genelex KT66 Vacuum Tube 1956 Date
$139.99

Strong Genelex KT66 Vacuum Tube 1956 Date

Genalex KT66 NOS Tested Strong Tube
$168.45

Genalex KT66 NOS Tested Strong Tube

RARE MATCHED PAIR GENALEX KT66 CUP GETTER TUBES (MADE IN ENGLAND) TESTED NOS
$449.00

RARE MATCHED PAIR GENALEX KT66 CUP GETTER TUBES (MADE IN ENGLAND) TESTED NOS

Rare PAIR GE 7581A 6L6GC KT66 TUBES (1960 Engineer Sample) DDGETTERS Test NOS 👑
$399.00

Rare PAIR GE 7581A 6L6GC KT66 TUBES (1960 Engineer Sample) DDGETTERS Test NOS 👑

1958 GENALEX KT66 Vacuum Tubes SMOKE Curved Brown Base Date Matched Pair GEC
$599.99

1958 GENALEX KT66 Vacuum Tubes SMOKE Curved Brown Base Date Matched Pair GEC

Matched Pair Mullard KT66 Grey Plate OO Getter England Tested Very Strong
$250.00

Matched Pair Mullard KT66 Grey Plate OO Getter England Tested Very Strong

GEC GENALEX KT66 6L6 CV1075 CV 321 VACUUM TUBE/VALVE NOS With Box price per tube
$399.00

GEC GENALEX KT66 6L6 CV1075 CV 321 VACUUM TUBE/VALVE NOS With Box price per tube

Genalex KT66 Gray Glass Vacuum Tube Amplitrex Tested 96% Gm
$225.00

Genalex KT66 Gray Glass Vacuum Tube Amplitrex Tested 96% Gm

KT66 - EL37, MULLARD Vintage audio tube, X 2 pcs, II , tested at AVO 160
$550.00

KT66 - EL37, MULLARD Vintage audio tube, X 2 pcs, II , tested at AVO 160

Vacuum Tube, KT66, Tube Amp Doctor, Premium Selected, Matched Pair, Power
$93.90

Vacuum Tube, KT66, Tube Amp Doctor, Premium Selected, Matched Pair, Power

Closely Matched Pair GE 7581A 6L6GC KT66 NOS NIB Tested Strong Tube
$228.45

Closely Matched Pair GE 7581A 6L6GC KT66 NOS NIB Tested Strong Tube

Vacuum Tube, KT66, Genalex Gold Lion, Matched Pair, Power
$137.90

Vacuum Tube, KT66, Genalex Gold Lion, Matched Pair, Power

Factory Match QUAD Genalex GOLD LION KT-66 KT66 Vacuum tubes
$240.87

Factory Match QUAD Genalex GOLD LION KT-66 KT66 Vacuum tubes

*ORIGINAL* Genalex Gold Lion KT66 Vacuum Tubes (pair)
$700.00

*ORIGINAL* Genalex Gold Lion KT66 Vacuum Tubes (pair)

KT66 GEC VALVE
$156.26

KT66 GEC VALVE

GEC KT66 tube QUAD same batch NIB NOS
$2,083.52

GEC KT66 tube QUAD same batch NIB NOS

GE 7581A KT66 6L6CC Power Tube Side Getter Hickok Tested NOS👑
$99.00

GE 7581A KT66 6L6CC Power Tube Side Getter Hickok Tested NOS👑

1 Matched Pair KT66 ARS Electron Tube _ Replacs Gold Lion MO Valve Genalex
$81.90

1 Matched Pair KT66 ARS Electron Tube _ Replacs Gold Lion MO Valve Genalex

*ORIGINAL* Amperex KT66 Smoked Glass Vacuum Tubes (pair)
$350.00

*ORIGINAL* Amperex KT66 Smoked Glass Vacuum Tubes (pair)

JJ Tesla KT66 Tubes Apex or TAD Matched Quad for Quad II MC30 MC240 tube amps
$299.00

JJ Tesla KT66 Tubes Apex or TAD Matched Quad for Quad II MC30 MC240 tube amps

Matched Pair Date Coded IEC Mullard KT66 Vintage Tubes Strong EXC For Amplifier
$295.00

Matched Pair Date Coded IEC Mullard KT66 Vintage Tubes Strong EXC For Amplifier

VERY RARE NOS 6L6G / 350B SYLVANIA * CUP GETTER ENGRAVED BASE TUBE 1947 USA KT66
$220.00

VERY RARE NOS 6L6G / 350B SYLVANIA * CUP GETTER ENGRAVED BASE TUBE 1947 USA KT66

NOS Platinum Matched PAIR 6L6GC Dual Disc GETTER Grail TUBES 6L6 KT66 8417
$315.00

NOS Platinum Matched PAIR 6L6GC Dual Disc GETTER Grail TUBES 6L6 KT66 8417

Matched 4pcs PSVANE ACME KT88 AKT88 Vacuum Tube Upgrade 6500 KT120 EL34 KT66
$445.00

Matched 4pcs PSVANE ACME KT88 AKT88 Vacuum Tube Upgrade 6500 KT120 EL34 KT66

1 VINTAGE EMITRON KT66 / 6L6G AUDIO TUBE MADE IN ENGLAND / GENALEX
$222.00

1 VINTAGE EMITRON KT66 / 6L6G AUDIO TUBE MADE IN ENGLAND / GENALEX

NOS NIB Genalex KT66 Vacuum Tube Tests Excellent @ 93% & 36ma Made In England
$225.00

NOS NIB Genalex KT66 Vacuum Tube Tests Excellent @ 93% & 36ma Made In England

GEC KT-66 NOS NIB Pair
$700.00

GEC KT-66 NOS NIB Pair

KT66 Genalex 1
$656.00

KT66 Genalex 1

Closely Matched Pair GE 7581A 6L6GC KT66 Tested Strong Tube
$178.45

Closely Matched Pair GE 7581A 6L6GC KT66 Tested Strong Tube

RARE NOS 6L6 6L6G KT66 GERMAN VINTAGE TUBE WF- RFT WELDED PLATES * BRIDGE GETTER
$316.00

RARE NOS 6L6 6L6G KT66 GERMAN VINTAGE TUBE WF- RFT WELDED PLATES * BRIDGE GETTER

1 VINTAGE GENALEX / GEC KT66 AUDIO TUBE MADE IN ENGLAND
$249.00

1 VINTAGE GENALEX / GEC KT66 AUDIO TUBE MADE IN ENGLAND

GEC KT66 VINTAGE VALVES TUBE AMPLITREX TESTED NEW OLD STOCK 100% GM
$200.00

GEC KT66 VINTAGE VALVES TUBE AMPLITREX TESTED NEW OLD STOCK 100% GM

GENALEX / EMITRON KT66 New old stock made in England (PAIR)
$400.00

GENALEX / EMITRON KT66 New old stock made in England (PAIR)

KT66, GEC Vintage audio tube, X 4 pcs, tested at AVO MKIII
$2,200.00

KT66, GEC Vintage audio tube, X 4 pcs, tested at AVO MKIII

KT66 GEC VALVE
$156.26

KT66 GEC VALVE

Display Box For KT66 Pair Handmade (Valves Not Included)
$71.62

Display Box For KT66 Pair Handmade (Valves Not Included)

2 Cinch 8 pin Military grade Tube Sockets for 6L6 5U4 5881 KT-88 KT-66 274 tubes
$12.99

2 Cinch 8 pin Military grade Tube Sockets for 6L6 5U4 5881 KT-88 KT-66 274 tubes

Relco Mullard Genalex KT66 NIB NOS Factory Matched Pair Vacuum Tubes Made In UK
$1,495.00

Relco Mullard Genalex KT66 NIB NOS Factory Matched Pair Vacuum Tubes Made In UK

Genalex Gold Lion KT66 Power Tubes - Matched Duet
$155.99

Genalex Gold Lion KT66 Power Tubes - Matched Duet

Genalex KT66 VACUUM TUBE Made in England Vintage Original
$160.00

Genalex KT66 VACUUM TUBE Made in England Vintage Original

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