6550-tube-pair

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1 pair Tung-Sol 6550 Black Plate tube USA 1950s my last pair (322HT3)
1 pair Tung-Sol 6550 Black Plate tube USA 1950s my last pair (322HT3)

$650.00

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2 Matched pair of GE 6550A NOS NIB Vacuum Tubes
2 Matched pair of GE 6550A NOS NIB Vacuum Tubes

$600.00

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Pair GE 6550 Tubes==Triple Getter
Pair GE 6550 Tubes==Triple Getter

$169.00

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Pair Tung Sol 6550 tubes - USA 3 hole gray plate #408-3
Pair Tung Sol 6550 tubes - USA 3 hole gray plate #408-3

$125.00

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RAM 6550 Matched Pair Output Tubes TEST STRONG SUPERB1
RAM 6550 Matched Pair Output Tubes TEST STRONG SUPERB1

$107.50

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Matched Pair RCA - Tung Sol 6550 Tubes / No Guide Pins / KT4
Matched Pair RCA - Tung Sol 6550 Tubes / No Guide Pins / KT4

$195.00

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Brand New Matched Pair (2) Genalex Gold Lion Reissue KT88 / 6550 Vacuum Tubes
Brand New Matched Pair (2) Genalex Gold Lion Reissue KT88 / 6550 Vacuum Tubes

$199.01

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Pair Mesa Boogie 6550-A STR-418 Tubes Test Strong
Pair Mesa Boogie 6550-A STR-418 Tubes Test Strong

$79.95

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GE 6550 Vacuum tubes..............Matched pair
GE 6550 Vacuum tubes..............Matched pair

$124.95

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Pair NOS NIB GE 6550A Tubes Amplitrex Tested 100%
Pair NOS NIB GE 6550A Tubes Amplitrex Tested 100%

$250.00

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Tung-Sol 6550 Electron Tubes, matching pair
Tung-Sol 6550 Electron Tubes, matching pair

$150.00

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6550 matched pair tubes USA Gold Aero
6550 matched pair tubes USA Gold Aero

$290.00

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SVETLANA SED 6550C Matched Pair WINGED C Metal Base “built Like A Tank” Tubes
SVETLANA SED 6550C Matched Pair WINGED C Metal Base “built Like A Tank” Tubes

$350.00

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KT-88 Sovtek Matched Pair Nos 6550WE 6550 metal base plate
KT-88 Sovtek Matched Pair Nos 6550WE 6550 metal base plate

$99.99

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Svetlana 6550C Vacuum Tubes NOS/NIB Tested and Matched Pair
Svetlana 6550C Vacuum Tubes NOS/NIB Tested and Matched Pair

$139.00

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(2) MATCHED NOS NIB GE 6550A Power Tubes ~ TEST STRONG!
(2) MATCHED NOS NIB GE 6550A Power Tubes ~ TEST STRONG!

$289.99

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RARE Matched Pair NOS/NIB General Electric 6550A tubes Triple Getter No Reserve!
RARE Matched Pair NOS/NIB General Electric 6550A tubes Triple Getter No Reserve!

$259.99

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Brand New Current Matched Pair Svetlana 6550 / 6550C (KT88) Reissue Vacuum Tube
Brand New Current Matched Pair Svetlana 6550 / 6550C (KT88) Reissue Vacuum Tube

$153.63

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GE 6550 Vacuum tubes.... Groove Tube Label..........Matched pair
GE 6550 Vacuum tubes.... Groove Tube Label..........Matched pair

$124.95

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Pair Of Vintage International C KT88 6550 Vacuum Tubes USA TV7 DU Strong!
Pair Of Vintage International C KT88 6550 Vacuum Tubes USA TV7 DU Strong!

$179.99

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Date Matched Pair of Tung-Sol 6550 Vacuum Tubes Strong Testing!
Date Matched Pair of Tung-Sol 6550 Vacuum Tubes Strong Testing!

$119.99

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Strong Testing Match Pair Of McIntosh KT88 6550 Audio Vacuum Tubes Russia Tested
Strong Testing Match Pair Of McIntosh KT88 6550 Audio Vacuum Tubes Russia Tested

$150.00

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Matched Pair Made in Russia Tung-Sol 6550 Tested Strong
Matched Pair Made in Russia Tung-Sol 6550 Tested Strong

$90.00

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Matched Pair G.E.C KT88 6550 Genalex Made in UK Test Good Tube
Matched Pair G.E.C KT88 6550 Genalex Made in UK Test Good Tube

$398.45

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Openbox—PSVANE Horizon Series 6550-AT Vacuum Tube Amplifier Matched Pair
Openbox—PSVANE Horizon Series 6550-AT Vacuum Tube Amplifier Matched Pair

$104.99

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Closely Matched Pair GE 6550A Tested Strong Tube
Closely Matched Pair GE 6550A Tested Strong Tube

$168.45

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Tung-Sol 6550 power tubes pair made in 2005 test very strong on Triplett 3444
Tung-Sol 6550 power tubes pair made in 2005 test very strong on Triplett 3444

$165.00

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Matched Pair Tung Sol 6550 Tubes / KT3
Matched Pair Tung Sol 6550 Tubes / KT3

$249.95

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Pair Tung Sol 6550 tubes - USA 3 hole gray plate | broken guide pin
Pair Tung Sol 6550 tubes - USA 3 hole gray plate | broken guide pin

$115.00

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Used GE 6550A Tubes USA test very good
Used GE 6550A Tubes USA test very good

$280.00

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MATCHED PAIR OF AUDIO CLASSICS 6550 STOCK VACUUM TUBES (BJR1011)
MATCHED PAIR OF AUDIO CLASSICS 6550 STOCK VACUUM TUBES (BJR1011)

$99.99

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Brand New Current Matched Pair (2) Electro-Harmonix 6550 Ceramic Vacuum Tubes
Brand New Current Matched Pair (2) Electro-Harmonix 6550 Ceramic Vacuum Tubes

$150.77

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Matched Pairs GE 6550A NOS NIB Beam Power Tubes. Test NEW (over 60) on TV7-D/U.
Matched Pairs GE 6550A NOS NIB Beam Power Tubes. Test NEW (over 60) on TV7-D/U.

$293.00

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Closely Matched Pair Electro-Harmonix KT88 6550 NOS NIB Tested Tube
Closely Matched Pair Electro-Harmonix KT88 6550 NOS NIB Tested Tube

$114.45

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Closely Matched Pair Electro-Harmonix KT88 6550 NOS NIB Same Date Tested Tube
Closely Matched Pair Electro-Harmonix KT88 6550 NOS NIB Same Date Tested Tube

$114.45

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Closely Matched Pair GE 6550A Tested Strong Tube
Closely Matched Pair GE 6550A Tested Strong Tube

$178.45

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Vintage Westinghouse USA GE General Electric 6550 Tubes Pair X2 Tube Maxi Tested
Vintage Westinghouse USA GE General Electric 6550 Tubes Pair X2 Tube Maxi Tested

$109.00

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Top Matched Pair Vintage TUNG-SOL 6550 Audio Tubes / NOS / AT1000 / KT88
Top Matched Pair Vintage TUNG-SOL 6550 Audio Tubes / NOS / AT1000 / KT88

$549.00

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JJ 6550 Power Vacuum Tube MATCHED PAIR
JJ 6550 Power Vacuum Tube MATCHED PAIR

$115.00

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RUBY 6550ASTR Power Vacuum Tube MATCHED PAIR SHUGUANG
RUBY 6550ASTR Power Vacuum Tube MATCHED PAIR SHUGUANG

$112.00

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JJ 6550 Ruby Power Vacuum Tube MATCHED PAIR
JJ 6550 Ruby Power Vacuum Tube MATCHED PAIR

$99.95

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Matched Quad Svetlana Winged =c= 6550 C Tube Tested Strong #31
Matched Quad Svetlana Winged =c= 6550 C Tube Tested Strong #31

$350.00

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2 NOS GE General Electric USA National Gold 6550A 6550 Vacuum tubes Matched #2
2 NOS GE General Electric USA National Gold 6550A 6550 Vacuum tubes Matched #2

$288.88

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Matched Pair of Sylvania 6550 Vacuum Tubes / KT5
Matched Pair of Sylvania 6550 Vacuum Tubes / KT5

$149.95

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Matched Pair Sylvania - Tung Sol 6550 Tubes / KT2
Matched Pair Sylvania - Tung Sol 6550 Tubes / KT2

$249.95

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Brand New Matched Pair (2) Genalex Gold Lion Reissue KT88 / 6550 Vacuum Tubes
Brand New Matched Pair (2) Genalex Gold Lion Reissue KT88 / 6550 Vacuum Tubes

$202.41

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RCA 6550 TESTED NOS /CHECKED GRID LEAKAGE / EMISSION TEST / SHORTS / LIFE TEST
RCA 6550 TESTED NOS /CHECKED GRID LEAKAGE / EMISSION TEST / SHORTS / LIFE TEST

$275.00

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MATCHED PAIR NOS SVETLANTA SV6550C TUBES
MATCHED PAIR NOS SVETLANTA SV6550C TUBES

$129.00

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Brand New Plate Current Matched Pair 2x Sovtek 6550WE Vacuum Tubes
Brand New Plate Current Matched Pair 2x Sovtek 6550WE Vacuum Tubes

$150.77

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General Electric 6550A RARE Matched Pair NOS/NIB tubes Test Completed Working
General Electric 6550A RARE Matched Pair NOS/NIB tubes Test Completed Working

$322.99

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KT88 6550 / Matched Pair / LINLAI / Perfect HIFI Audio / Vacuum Tube Amp Classic
KT88 6550 / Matched Pair / LINLAI / Perfect HIFI Audio / Vacuum Tube Amp Classic

$86.66

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Matched Pair of Sylvania 6550 Vacuum Tubes / KT2
Matched Pair of Sylvania 6550 Vacuum Tubes / KT2

$149.95

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Sovtek 6550 WE Vacuum tubes......Matched pair....NOS...Double Halos
Sovtek 6550 WE Vacuum tubes......Matched pair....NOS...Double Halos

$109.95

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Pair NOS Cinch Octal Vacuum Tube Sockets for 6L6GC, 6550, EL34, KT66, 6V6GT, etc
Pair NOS Cinch Octal Vacuum Tube Sockets for 6L6GC, 6550, EL34, KT66, 6V6GT, etc

$8.99

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6550 TUNG-SOL Type 2 - 4th Gen Halo Getter Three Hole Matched Pair USA Tubes
6550 TUNG-SOL Type 2 - 4th Gen Halo Getter Three Hole Matched Pair USA Tubes

$268.74

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6550 Sylvania, Vacuum Tubes, NOS Matched pair, Tested. SALE IS FOR THE PAIR
6550 Sylvania, Vacuum Tubes, NOS Matched pair, Tested. SALE IS FOR THE PAIR

$249.00

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Closely Matched Pair GE 6550A Tested Strong Tube
Closely Matched Pair GE 6550A Tested Strong Tube

$168.45

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Matched Pair of Sylvania 6550 Vacuum Tubes / KT1
Matched Pair of Sylvania 6550 Vacuum Tubes / KT1

$149.95

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Pair of Electro-Harmonix 6550 EH Power Vacuum Tube
Pair of Electro-Harmonix 6550 EH Power Vacuum Tube

$135.90

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Closely Matched Pair G.E.C KT88 6550 Genalex Same Date Made in UK Test Good Tube
Closely Matched Pair G.E.C KT88 6550 Genalex Same Date Made in UK Test Good Tube

$538.45

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Matched Pair of Sylvania 6550 Vacuum Tubes / KT4
Matched Pair of Sylvania 6550 Vacuum Tubes / KT4

$149.95

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Matched Pair of Sylvania 6550 Vacuum Tubes / KT3
Matched Pair of Sylvania 6550 Vacuum Tubes / KT3

$149.95

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Brand New Plate Current Matched Pair (2) Sovtek 6550WE Vacuum Tubes
Brand New Plate Current Matched Pair (2) Sovtek 6550WE Vacuum Tubes

$153.35

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2pcs ShuGuang 6550B Vacuum Valve Tube KT88 Amplifier Matched Pair New Version
2pcs ShuGuang 6550B Vacuum Valve Tube KT88 Amplifier Matched Pair New Version

$87.77

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Brand New Plate Current Matched Pair 2x Mullard Reissue KT88 6550 Vacuum Tubes
Brand New Plate Current Matched Pair 2x Mullard Reissue KT88 6550 Vacuum Tubes

$160.79

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Pair of GENALEX KT88 Gold Lion MADE IN ENGLAND / (6550) tested strong
Pair of GENALEX KT88 Gold Lion MADE IN ENGLAND / (6550) tested strong

$479.00

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1 Pair 8-pin Bias Current Probes Tester VU Meter for EL34 KT88 6L6 6V6 6550 Tube
1 Pair 8-pin Bias Current Probes Tester VU Meter for EL34 KT88 6L6 6V6 6550 Tube

$59.99

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Matched Pair Tung Sol 6550 Tubes / KT7
Matched Pair Tung Sol 6550 Tubes / KT7

$249.95

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1 Matched Pair PSVANE KT88-PT HiFi Series Vacuum Tubes 6550
1 Matched Pair PSVANE KT88-PT HiFi Series Vacuum Tubes 6550

$100.44

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RCA 6550 Grey Plates good working used pair
RCA 6550 Grey Plates good working used pair

$100.00

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Matched Pair LINLAI KT88 6550 Perfect HIFI Audio Vacuum Tube Amp Classic Tested
Matched Pair LINLAI KT88 6550 Perfect HIFI Audio Vacuum Tube Amp Classic Tested

$81.53

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Matched Pair Tung Sol 6550 Tubes / KT6
Matched Pair Tung Sol 6550 Tubes / KT6

$249.95

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SYLVANIA 6550 KT-88 MATCHED POWER TUBE PAIR V1 TIGHT 1% NOS NIB *eTRACER*
SYLVANIA 6550 KT-88 MATCHED POWER TUBE PAIR V1 TIGHT 1% NOS NIB *eTRACER*

$449.99

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Pair of Sylvania 6550 Tubes Tested and Matched (e)
Pair of Sylvania 6550 Tubes Tested and Matched (e)

$150.00

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6550 GE USA , one pair
6550 GE USA , one pair

$231.64

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Tung-Sol 6550 power tubes pair made in 2005 test very strong on Triplett 3444
Tung-Sol 6550 power tubes pair made in 2005 test very strong on Triplett 3444

$165.00

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SVETLANA 6550C Vacuum Tube Matched QUAD 4 Sets USED JAPAN vintage audio analog
SVETLANA 6550C Vacuum Tube Matched QUAD 4 Sets USED JAPAN vintage audio analog

$1079.99

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Electro Harmonix 6550EH Matched Pair of Vacuum Tubes Used & Tested
Electro Harmonix 6550EH Matched Pair of Vacuum Tubes Used & Tested

$99.99

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GE 6550C Vacuum tubes Matched pair See Test Results Mid-"70's
GE 6550C Vacuum tubes Matched pair See Test Results Mid-"70's

$165.00

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TUNG - SOL 6550 vacuum tube set of 8, made in Russia, matched pair, 4 sets
TUNG - SOL 6550 vacuum tube set of 8, made in Russia, matched pair, 4 sets

$900.00

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Quad Mathced PSVANE KT88-T MarK II Classic Grade Vacuum Tube replace CV5220 6550
Quad Mathced PSVANE KT88-T MarK II Classic Grade Vacuum Tube replace CV5220 6550

$189.99

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Matched Pair of Used Tested 6550A Vacuum Tubes GE/MPD. Test 64 & 62 on TV-7D/U.
Matched Pair of Used Tested 6550A Vacuum Tubes GE/MPD. Test 64 & 62 on TV-7D/U.

$198.00

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Matched Date PAIR Sylvania USA 6550 Tubes Metal Base 1970s USED - Test 100% NOS
Matched Date PAIR Sylvania USA 6550 Tubes Metal Base 1970s USED - Test 100% NOS

$131.44

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Pair of Tung-Sol 6550 New Production Power Vacuum Tube
Pair of Tung-Sol 6550 New Production Power Vacuum Tube

$145.90

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Brand New Plate Current Matched Pair (2) Mullard Reissue KT88 6550 Vacuum Tubes
Brand New Plate Current Matched Pair (2) Mullard Reissue KT88 6550 Vacuum Tubes

$163.54

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6550-TK Black Diamond Series Vacuum Tube Matched Pair
6550-TK Black Diamond Series Vacuum Tube Matched Pair

$205.00

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Sovtek 6550 WE Vacuum tubes - Matched pair - Tested with Leslie 147 See video
Sovtek 6550 WE Vacuum tubes - Matched pair - Tested with Leslie 147 See video

$110.49

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Vacuum Tube, 6550C, Svetlana, Matched Pair, Power
Vacuum Tube, 6550C, Svetlana, Matched Pair, Power

$140.70

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Vacuum Tube, 6550, Electro-Harmonix, Matched Pair, Power
Vacuum Tube, 6550, Electro-Harmonix, Matched Pair, Power

$137.90

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Matched Pair GE - Tung Sol 6550 Tubes / KT5
Matched Pair GE - Tung Sol 6550 Tubes / KT5

$249.95

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Vacuum Tube, 6550, JJ Electronics, Apex Matched Pair, Power
Vacuum Tube, 6550, JJ Electronics, Apex Matched Pair, Power

$116.90

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1 New Matched Pair PSVANE UK KT88 UK-KT88 Audio Valve Vacuum Tube /6550/KT120
1 New Matched Pair PSVANE UK KT88 UK-KT88 Audio Valve Vacuum Tube /6550/KT120

$118.99

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+++ Matched PAIR Vintage 1974 Tung-Sol 6550 for DYNACO - AT1000 Tested +++
+++ Matched PAIR Vintage 1974 Tung-Sol 6550 for DYNACO - AT1000 Tested +++

$220.00

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Vacuum Tube, 6550, JJ Electronics, Apex Burned-In Matched Pair, Power
Vacuum Tube, 6550, JJ Electronics, Apex Burned-In Matched Pair, Power

$119.80

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Tung-Sol 6550 ST NOS-U.S. Made
Tung-Sol 6550 ST NOS-U.S. Made

$399.95

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1 matched PAIR KT88-T3 KT88 ART Vacuum Tube diy audio tube 6550
1 matched PAIR KT88-T3 KT88 ART Vacuum Tube diy audio tube 6550

$189.99

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1PC NEW Audio Valve Vacuum Russia Mullard KT88 Replace 6550
1PC NEW Audio Valve Vacuum Russia Mullard KT88 Replace 6550

$84.99

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Tube Amp Doctor MOV KT88 6550 TAD KT88-STR Matched Pair Octal Base
Tube Amp Doctor MOV KT88 6550 TAD KT88-STR Matched Pair Octal Base

$151.34

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Gm Matched Pair Sovtek 6550WE 6550 KT88 Metal Bases Welded Plates 07
Gm Matched Pair Sovtek 6550WE 6550 KT88 Metal Bases Welded Plates 07

$225.00

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Factory Platinum Matched Quad Sovtek 6550WE - For Audio Research, Dynaco, CJ
Factory Platinum Matched Quad Sovtek 6550WE - For Audio Research, Dynaco, CJ

$310.00

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