Vt229 ecc35 sylvania tube tube QUAD 6sl7 gt 5691 PLAQUE RONDE NOIRE mil specs collection

CODE A.

JAN CHS 6SL7GT VT-229 SYLVANIA BLACK ROUND PLATE

MATCHED QUAD = 4 TUBES = 4 VALVES = 4 VINTAGE VACUUM TUBES MILITARY ARMY NAVY

MILITARY SPECIFICATIONS JOINT ARMY NAVY JAN SC966A

NOS NIB TUBES WITH ORIGINAL CARTON WRAP BOX

CODE ON BASE SC966A

BLACK BASE

PAN FOIL GETTER BOTTOM

BLACK PLATE HOLED WELDED

RUGGED RELIABLE LONG LIFE

JAN ARMY NAVY WARTIME BLACK ROUND PLATE nos tubes military specifications mil specs SC966A fully tested 55/55 ; 50/48 ; 52/54 ; 54/54 ( good at 32/32 ) on tube tester calibrated TV7D/U
one tube has a small piece of glass inside, full working and tested Pan getter

TWIN TRIODE DOUBLE TRIODE TUBES FOR PRE AMPLIFIER
PREAMP DRIVER PRE PHONO INPUT FIRST STAGE 1ST STAGE AUDIO

6SL7GT = CV1984 = CV1985 = 6Н9С = 6SL7 = VT-229 = 6N9P
Similar tube Other shape (e.g. bulb type): 6SL7GTB ; 6Н9М
Sub tube: 6113 ; 6SL7_DDR
Other class quality (otherwise equal): 6SL7WGT ; 6SU7GTY
Heater different: 12SL7GT ; 5691 ; ECC35
Other base: 7F7
First informations 02.Jul.1941 : Electron Tube Registration List
Sub the following models6SC7 6SC7GT
Evolution 12AX7 7F7 6SL7GTB 6SL7WGT
Socket Octal (Int.Octal, IO) K8A
Filament Heater Vf 6.3 Volt / If 0.3 Ampere / Indirect / Parallel / series ~ = AC/DC

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box 69

CODE A