Hello Paul,
As you will put the step start circuit in the transformer primary, it
will limit the transformer inrush current and thus all the voltages
provided by the transformer - filament, screen, grid, plate.
73, Val LZ1VB
На 01-10-23 в 21:19, Paul Decker написа:
Hello all.
I'm building a 4cx1500b amplifier. This is the first tetrode high power
amplifier I've tried to do. I'm using about 300V on the screen and 2500 on the
plate.
For my power supply I'm using a 1 Henry choke input on the screen supply
dumping into 200uF This seems pretty stiff. For the plate supply it's a
voltage doubler outputting 2700 V dumping into 93uF. Not quite as stiff, about
300V drop under full load. I have plenty of capacitors, so I can add more
capacitance if needed.
Two questions,
1. is the plate voltage regulated enough or do I need more plate regulation and
2. for soft start, Should the soft start bring both the screen voltage and
plate voltage up or should I let the screen voltage be and just soft start the
plate voltage.
Thanks for any insights you all might have.
Paul
KG7HF
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