01-12-2014, 06:48 PM
Last post must have been lost. This circuit works OK provided output tubes are reasonably well matched, and will not win any awards from instrument based fidelity tests. O course if "upper " output fails, you will get no sound at all. Probably didn't matter much for AM radios and the ultimate limit of loudspeakers of the time. Do a switcheroo of the ouputs to see which sounds better to you.