| The original 6550 is a pear shaped high power tetrode designed for audio use by American Tung-Sol company, and became quite popular in American audio amps in 1950s and on. Later, GE and Philips produced straight bottle 6550s. 6550 tubes were also used in guitar amplifiers, notably in US versions of Marshalls and various versions of Ampeg.
There are excellent 6550 tubes being produced today by Russian and Chinese manufacturers that we carry. These tubes model after the original TungSol and GE tubes, and provide excellent sonics and high reliability.
KT88 and KT90 tubes are interchangeable with 6550, so you can try any of KT88 and KT90 tubes in place of 6550.
The 6550 tubes we carry are burned-in for 24 hours and matched under real operation condition. We offer 6550 tubes in pair, quad and sextet. Octet (set of 8) is also avilable for extra matching fee. |
