03-02-2010, 02:55 PM
I've already gotten the correct reproduction knobs (push-on type) from Radio Daze and the set looks much better. I also found and replaced a couple of really weak tubes and the set works better now, too.
Is there an issue with the reproduction escutcheon that makes it difficult to insert tabs? I thought I saw something on ARF about the supplier changing the mould.
Thanks for the information about the funky "screen inversion" circuit. Looking at the component values, it really shouldn't reduce output power significantly, but it should increase the amount of harmonic distortion compared to a conventional push-pull output stage. So the set should sound as loud as if it had a phase inverter, but not as clean. I don't think you could compare power output between screen inversion and phase inverter sets if the B+ changed also, because B+ is the most significant determinant of power output given similar output tubes.
-David
Is there an issue with the reproduction escutcheon that makes it difficult to insert tabs? I thought I saw something on ARF about the supplier changing the mould.
Thanks for the information about the funky "screen inversion" circuit. Looking at the component values, it really shouldn't reduce output power significantly, but it should increase the amount of harmonic distortion compared to a conventional push-pull output stage. So the set should sound as loud as if it had a phase inverter, but not as clean. I don't think you could compare power output between screen inversion and phase inverter sets if the B+ changed also, because B+ is the most significant determinant of power output given similar output tubes.
-David
