The PHILCO Phorum

Full Version: Well this will be simple.
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printer died on me and had to draw the schematic of my next project. It is a 4 tube trf Belmont not much to this set. [attachment=19286]
You might want to double check the value of the 350K resistor on the ct of the hv winding. Methinks it should be 350ohms.

GL
I corrected that it is suppose to be just 350 ohms
Looks like a fun project Jake. I love the simplicity in these designs.
Jake,

I do not see a cap that decouples the GND itself. You know, the one with the + on the GND and the - on the centertap.
If you use the GND as the common and it is not the centertap, you might want to decouple that too.
A small cap, 10uF 50V will do.
i will check that out thank you.
Here is the actual schematic i need to double check mine anyway and do some study on the power supply circuit.
[attachment=19287]
They don't have it decoupled.
This is a good practice however, most Philcos with the GND biased relative to the centertap will have it.