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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 12th November 2019, 05:08 PM   #1
nikon f is offline nikon f  United States
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Default Metal 6L6 Tubes with SSE?

Can I use metal 6L6 tubes with the SSE amp?
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Old 13th November 2019, 02:13 AM   #2
Tubelab_com is offline Tubelab_com  United States
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The old metal tubes could not handle the screen voltage and plate dissipation that a modern 6L6GC can. If your SSE runs at a lower than the usual 430+ volts of B+ maybe. It's possible that good tubes may live OK in a higher voltage SSE if the cathode resistor is increased to lower the dissipation to about 15 watts. I have run them in one of my amps, but I did not run them for long enough to see how then held up.

See this thread for more details:

Are 6L6 Metal tubes plug and play
Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
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