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If you plan to run the radio from batteries only this ist totally fine.
If you run it from mains, it needs the diodes or a new battery to avoid blowing the tube filaments from overvoltage. The advantage of the diode circuit is: it will last forever- a new battery will fail again sooner or later BTW: This portable radio has two output tubes too for the same reason you already mentioned: https://www.radiomuseum.org/r/radione_r20.html Edit: Of course the Radione R20 only has one AF output tube but this radio has two: https://www.radiomuseum.org/r/minerv...able_531f.html Last edited by Josef; 02-15-2021 at 02:12 PM. |
Audiokarma |
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