[jake wells]

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.     

[Radioroslyn]

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

[jake wells]

I corrected that it is suppose to be just 350 ohms

[EdHolland]

Looks like a fun project Jake. I love the simplicity in these designs.

[morzh]

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.

[jake wells]

i will check that out thank you.

[jake wells]

Here is the actual schematic i need to double check mine anyway and do some study on the power supply circuit.

belmont 41a.pdf Size: 42.37 KB  Downloads: 180

[morzh]

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.