Tube DIY Asylum

Posted by hifitom (A) on October 31, 2001 at 22:56:18

Hi All,

As I have been playing with this rectifier (a 5Y3) in place of the resistor & cap from the cathodes (actually the CT of the filament transformer)of the output tubes (2A3s), I have been thinking about what is considered "ground". Taking what I have a step further, would there be any benefit to moving all ground points in the driver section to the cathode (the CT of the filament transformer, also the plate/s the rectifier), leaving only the grid resistor of the output tube and the power supply caps connected to the CT of the power transformer, a point formerly known as "ground"? How would this affect the load that the driver would see, as the grid resistor on the power tube is not terminated at the same potential as the cathode resistor of the driver? Also, would this lead to problems with the coupling between the 2 tubes?

You can probably tell that I don't get enough sleep and my mind wanders...

Tom

• Re: rectified cathodes and "ground" - J Epstein 12:26:57 11/02/01 (0)
• BTW...great answer to the guy (below)... - petef 11:42:55 11/01/01 (0)
• Re: rectified cathodes and "ground" - petef 11:25:26 11/01/01 (3)
  • Re: rectified cathodes and "ground" - hifitom 15:31:29 11/01/01 (2)
    • Re: rectified cathodes and "ground" - petef 08:09:33 11/02/01 (1)
      • Thanks Pete & Jeremy! - hifitom 19:38:01 11/02/01 (0)