RCA 6SN7’s Question?
Toolfan66
Posts: 17,349
in Electronics
So I purchased this lot of NOS RCA 6SN7GTB’s
9 of them look a little different, the base is shorter, the diameter is about 1.45, and there is a hair thin wire you can see going across the top.
The other 4 of them have a taller base, diameter is about 1.65, and no hair wire going across the top.
Outside that the build between the two look the same.
Different manufacturers?
I actually like the look of the taller wider base, but not like you will see them.
What do you Tube guru/nerds think?
9 of them look a little different, the base is shorter, the diameter is about 1.45, and there is a hair thin wire you can see going across the top.
The other 4 of them have a taller base, diameter is about 1.65, and no hair wire going across the top.
Outside that the build between the two look the same.
Different manufacturers?
I actually like the look of the taller wider base, but not like you will see them.
What do you Tube guru/nerds think?
Polk Audio SDA 2.3tl Fully Hot Rodded. 😎
SVS SB16 X2
Cary SLP-05/Ultimate Upgrade.
Cary SA-500.1 ES Amps
Cary DMS 800PV Network
OPPO UDP 205/ModWright Modification
VPI Scout TT / Dynavector 20x2
Jolida JD9 Fully Modified
VPI MW-1 Cyclone RCM
MIT Shotgun 3 cables throughout / Except TT, and PC’s
SVS SB16 X2
Cary SLP-05/Ultimate Upgrade.
Cary SA-500.1 ES Amps
Cary DMS 800PV Network
OPPO UDP 205/ModWright Modification
VPI Scout TT / Dynavector 20x2
Jolida JD9 Fully Modified
VPI MW-1 Cyclone RCM
MIT Shotgun 3 cables throughout / Except TT, and PC’s
Comments
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I have a pair of both those tubes. GE made tubes like that top filament. The RCA flashes at start up, the GE stays red hot as long as the tube is on. GE calls theirs "bridged filament" .
The bases did change to the shorter style on all after a point in time. Usually the taller base is older tube.
RCA made many styles across years and decades. My personal opinion is both are RCA made tubes. -
Ha, filament was the word I was looking for, thanks Ivan, hopefully I can give a few of these a shot this weekend..Polk Audio SDA 2.3tl Fully Hot Rodded. 😎
SVS SB16 X2
Cary SLP-05/Ultimate Upgrade.
Cary SA-500.1 ES Amps
Cary DMS 800PV Network
OPPO UDP 205/ModWright Modification
VPI Scout TT / Dynavector 20x2
Jolida JD9 Fully Modified
VPI MW-1 Cyclone RCM
MIT Shotgun 3 cables throughout / Except TT, and PC’s -
