03-29-2021, 12:29 AM
Greg,
If it were some high end radio with a phonograph and I were hellbent on making it work really quiet, I would probably put a rectifier bridge on that filament winding, then filtered it with a real good cap and got me a super quiet filament. Or maybe tried that potentiometer thing they often use, like in 37-690 when balancing the output direct heated triodes' filaments.
But this radio, as good as it is, is not really a high end, and as long as it sounds nice enough I am satisfied. I simply want to keep it close to original. I installed that 0.047uF yellow cap and left it yellow, so if I ever need to remove it, I know exactly what to remove; the rest of the chassis looks original as the resistors used were mostly carbon composite that looks like they should, and the caps were re-stuffed. So if I ever open it up, I know exactly where to look
If it were some high end radio with a phonograph and I were hellbent on making it work really quiet, I would probably put a rectifier bridge on that filament winding, then filtered it with a real good cap and got me a super quiet filament. Or maybe tried that potentiometer thing they often use, like in 37-690 when balancing the output direct heated triodes' filaments.
But this radio, as good as it is, is not really a high end, and as long as it sounds nice enough I am satisfied. I simply want to keep it close to original. I installed that 0.047uF yellow cap and left it yellow, so if I ever need to remove it, I know exactly what to remove; the rest of the chassis looks original as the resistors used were mostly carbon composite that looks like they should, and the caps were re-stuffed. So if I ever open it up, I know exactly where to look
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
