Made in USA by Tung-Sol (1960).
Solid gray plate, no hole version with Triple O-Getter (one on top and two on each side).
One of outstanding 6550s ever made from Tung-Sol (USA).
Very hard to find today
Nos in box. Matched pair are available.
Made in USA by Tung-Sol (1967 - 1971).
Three holes on gray plate with Triple O-Getter. Last version from Tung-Sol ever made.
This version has been produced by General Electric in the same time and they are same quality and out looking. One of famous Power Pentode from USA.
Nos in box. Matched pair are available.
Made in USA by Tung-Sol (1967 - 1971).
Three holes on gray plate with Triple O-Getter. Last version from Tung-Sol ever made.
This version has been produced by General Electric in the same time and they are same quality and out looking. One of famous Power Pentode from USA.
Nos in box. Matched pair are available.
Made in USA by Tung-Sol (1967 - 1971).
Three holes on gray plate with Triple O-Getter. Last version from Tung-Sol ever made.
This version has been produced by General Electric in the same time and they are same quality and out looking. One of famous Power Pentode from USA.
Tested like new. Matched pair and quad are available. Tested very strong (under 4%).
Made in USA by General Electric (after 1980s)
If you want the best tone for your amp these are the tubes to get. An added benefit to having NOS GE 6550A is that these can handle much higher plate voltages and will last much longer in both Hi-Fi and musical instrument amps than most 6550 made today.
Nos in box. All same date code. Matched pair and quad are available. Tested under 2%.
Made in USA by Tung-Sol for US' Army.
Another nice version of 6L6's family.
Gray plate, side Double D-Getter.
Nos but no box.
Made in USA by Sylvania.
Engrave base, muddy black plate. Very good sounding tubes.
Nos in box. Matched pair and quad are available.
Made in USA by Ken-Rad.
Black glass, black plate. Very good midrange and balance.
Nos in original box. Matched quad are available.
Made in USA by RCA.
Black glass, black plate. Very good midrange and balance.
Nos in original box. Matched quad are available.
Made in USA by RCA.
Black glass, black plate. Very good midrange and balance.
Used but tested excellent. Matched quad are available.
