The 6550 is the American version of the KT88. The plate structure is different form true
European KT88's but the tubes can be interchanged without issues. The KT90 is a close
relative to the KT88 and 6550, but is not an exact replacement. Check your amplifier's
manual to see if the KT90 is safe to use in your amplifier.
6550 tubes
50| Order no. | Tube type and description | Price each |
| 6550.001 | 6550A G.E. Metal base vintage G.E. tubes | $125.00 |
| 6550.002 | 6550C SED Winged "C" tubes from Svetlana plant in St. Petersburg Russia | $70.00 |
| 6550.003 | 6550C Chinese Shugung manufacture tubes | $24.00 |
| 6550.004 | 6550 Tung-Sol | $200.00 |
| 6550.005 | 6550 RCA | $125.00 |
| 6550.006 | 6550WE Sovtek | $24.00 |
| 6550.007 | 6550 Sylvania | $125.00 |
KT88 tubes
| Order no. | Tube type and description | Price each |
| KT88.001 | KT88 Valve Art Chinese manufacture | $24.00 |