6sn7gtb rca red letter audio receiver guitar preamp vacuum tubes tested trio

6sn7gtb rca red letter audio receiver guitar preamp vacuum tubes tested trio

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RCA 6SN7 GTB TUBE 1970s LEGENDARY 2 HOLE TOUGH DOGs w/ GLOW TOPS MATCHING QUAD

RCA 6SN7 GTB TUBE 1970s LEGENDARY 2 HOLE TOUGH DOGs w/ GLOW TOPS MATCHING QUAD

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2 matched 1968 RCA 6SN7GTB 'Bridge-Top'+ 'Small Base' Tubes - NOS / New In Boxes

2 matched 1968 RCA 6SN7GTB 'Bridge-Top'+ 'Small Base' Tubes - NOS / New In Boxes

$75.00

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2 Strong Matched RCA Black Plate Bottom D Getter 6SN7GTB Tubes #11

2 Strong Matched RCA Black Plate Bottom D Getter 6SN7GTB Tubes #11

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1 x 6SN7 GTB RCA Fat Base Black Plate Tube - TV-7 Tested NOS

1 x 6SN7 GTB RCA Fat Base Black Plate Tube - TV-7 Tested NOS

$15.00

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NEW, RCA 6SN7GTB, NARROW GAP, black plates, D-getter, 6SN7GT NOS Electron Tube

NEW, RCA 6SN7GTB, NARROW GAP, black plates, D-getter, 6SN7GT NOS Electron Tube

$30.00

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RCA COIN BASE 6SN7GTB BLACK PLATE VINTAGE TUBE - TEST TV7+

RCA COIN BASE 6SN7GTB BLACK PLATE VINTAGE TUBE - TEST TV7+

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Vintage RCA 6SN7GTB Offset Black Plate Tested

Vintage RCA 6SN7GTB Offset Black Plate Tested

$10.00

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RCA 6SN7 GTB TUBE LEGENDARY 1957 TOUGH DOGS 2 HOLE BLACK PLATES MATCHING SET

RCA 6SN7 GTB TUBE LEGENDARY 1957 TOUGH DOGS 2 HOLE BLACK PLATES MATCHING SET

$47.00

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2, NEW, RCA 6SN7GTB, tall bottle, black plates, low D-getter, match pr 4, 6SN7GT

2, NEW, RCA 6SN7GTB, tall bottle, black plates, low D-getter, match pr 4, 6SN7GT

$104.95

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6SN7GTB RCA 2 radio audio amplifier vintage vacuum tubes valves tested 6SN7GT

6SN7GTB RCA 2 radio audio amplifier vintage vacuum tubes valves tested 6SN7GT

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