Monday, June 17, 2019

How would a DL94 battery electron tube power amplifier sound like?


At your risk. Any voltage or current can be dangerous.


A Wega Bambino B electron tube radio had been playing. It can go very loud although the single ended amplifier output is in hundreds of milliwatts.


How would DL94 sound as a single ended (class A1) power amplifier? (class A means electrons flowing all the time, A1 possibly means grid is not driven positive).


Would a Vb of 45V be enough?
Would Pleiades bias increase current at that potential?
Would open grid sound nice?
Would triode connection be better?
Would an input transformer of a small ratio be enough to strongly drive the grid?


How would it sound compared to a Pleiades BD139 one transistor amplifier with output impedance matching transformer?



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