Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Buy - Sell - Trade => Topic started by: pbman1953 on August 05, 2026, 09:14:50 am
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I have 4- 6550 tubes- 3 Tung Sol and 1 GE. All Made in the USA- priced individually
All tested with an Amplitrex AT-1000. Each one has it's own print out
Any tube or combination will ship for free to CONTUS
1- GE 6550a- Could pass as new. It's over spec at 11350 from a spec of 11000 umhos. DC current- 144.4 - $100
2- Tung Sol- 6550- 70% life left- 7600 out of 11,000, 135.7ma out of 140- $110 ea
3- Tung Sol- 6550- 60% life left- 6050 out of 11,000, 125.2ma out of 140- $100 ea
4- Tung Sol- 6550- 50% life left- 5120 out of 11,000, 111.1ma out of 140- $100 ea