22-11-2022, 11:34 PM
(This post was last modified: 22-11-2022, 11:34 PM by Murphyv310.)
Hi
On AC sets if one side of the heaters are grounded the "live" side can be half wave rectified and then filtered with a 4700uf 16v cap and dropped via a suitable resistor for 9v then smoothed with a 1000uf in parallel with a 0.1uf ceramic bead, regulation is unnecessary as the module has built in regulation and further filtering. One I fitted in a Pye set is still going strong although the ownernever tunes off Radio Scotland.
On AC sets if one side of the heaters are grounded the "live" side can be half wave rectified and then filtered with a 4700uf 16v cap and dropped via a suitable resistor for 9v then smoothed with a 1000uf in parallel with a 0.1uf ceramic bead, regulation is unnecessary as the module has built in regulation and further filtering. One I fitted in a Pye set is still going strong although the ownernever tunes off Radio Scotland.
