David G4DMP
09-03-2007, 15:26
Has anyone else carried out the Sat-Schneider modifications to the Morphy Richards Model 7024 DRM receiver?
I have, and I am most disappointed. Changing the two 7805 regulators to the switching controller has not reduced the supply current to 0.42A as stated in the information. The current remains at 0.72A.
Also, I find now that I am unable to use the original power unit. This 9V power unit provides an on-load voltage of 12V. With 12V, the radio only operates for a few seconds before it goes back into stand-by and then cycles between stand-by and On continuously.
To get the radio to work from an external supply, I have to use a 10V supply. However, 10V is insufficient to provide any charging current to the NiMh batteries.
As things are at present, I am unable to recommend the Sat-Schneider mod and am thinking of putting back the original 7805 regulators so I can use the original power supply and provide sufficient current to charge the batteries.
I would be interested to know of anyone else's experience with the Sat-Schneider mod?
David
I have, and I am most disappointed. Changing the two 7805 regulators to the switching controller has not reduced the supply current to 0.42A as stated in the information. The current remains at 0.72A.
Also, I find now that I am unable to use the original power unit. This 9V power unit provides an on-load voltage of 12V. With 12V, the radio only operates for a few seconds before it goes back into stand-by and then cycles between stand-by and On continuously.
To get the radio to work from an external supply, I have to use a 10V supply. However, 10V is insufficient to provide any charging current to the NiMh batteries.
As things are at present, I am unable to recommend the Sat-Schneider mod and am thinking of putting back the original 7805 regulators so I can use the original power supply and provide sufficient current to charge the batteries.
I would be interested to know of anyone else's experience with the Sat-Schneider mod?
David