Tube Lab

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[@audiorick841]

Although I already knew what OTL was, nevertheless it’s always nice to hear how you explain it. You guys are awesome and very talented at explaining this for the community in a very understandable manner. …And your tubes are awesome, I got a few orders from you over time and they’ve always been fantastic. Keep up the amazing work.

[@henrikbroden4513]

This was educational for me.I have learned something new today. Thank you so much.

[@robbrookby3350]

Another great video. Convinced me to hoover up a pair of Toshiba 6080s for my WA22. Thanks gents!

[@cobar5342]

I have an OTL from another well-known USA company using a 300b and it is great The claim of very low noise seems to be realistic to me

[@drdyna]

oo, I'd love to have a couple of those 6336A, that's a sassy tube.

[@thermionic1234567]

I have three…

[@garyedwards9617]

For your 200th , tube rolling :)

[@regaldf.9493]

Not sure if this also occured in the US, but in Europe in the late 60's, maybe even early 70's there were 800 Ohm speakers produced to be driven OTL, by tube output stages in a circuit similar to a semiconductor PP amp with same-polarity transistors. The tubes used were EL86 or UL84, that had relatively moderate current (up to 100mA). They were run as pentodes, not triode-strapped, and they were prone to burning off the screen grids. Therefore they had to be much reduced in power and gave about 8 Watts - still more than what they would have produced as triodes. But a headphone amp OTL with a 6080 or similar??? Nearly 16 Watts of heater power plus at least 10 Watts on each plate for maybe 100 mW output - sorry, I think that's really absurd!

[@user-qt4nc2on7n]

6AS7 = 6Н5С = 6Н13С

[@j.wellness7771]

How about an OTL for 8 ohm planar headphones such as the Verum One?

[@tubelab194]

Not practical, my recommendation would be to drive them with a tube output stage coupled with a multi tap output transformer. We actually have a complete headphone amp prototype that would be perfect, as the lowest tap is 8ohms. If you want to experience an OTL amp, I'd recommend thinking about higher impedance headphones. Large selection starting at 150 and 300 ohm. But first find the amp you want, then the headphones, that way you'll know for sure they're compatible. We're currently developing another Kit Headphone Amp and it should be a good match for 150/300 ohm cans.

[@j.wellness7771]

@@tubelab194 thank you