[R-390] R-392

[Jacques Fortin]

Hello Jim,
This is a very good solution too.
The only values that are missing is the current rating and the DC resistance of your 6H chokes...
I presume that 200mA rated parts will be needed but the DC resistance also play a role in the output voltage.
Do you have a maker/model for your 6H chokes ?

73, Jacques, VE2JFE in Montreal


Since the R-390A/URR cost reduction program deleted the high heat generating regulated power supply used in the R-390/URR, has anyone considered removing the regulated power supply circuit from the audio module and installing two 6H chokes and suitable electrolytic capacitors in place of the 6082 tubes?  

The end result will be very close to the 180 or so volt B+ seen in the R-390A/URR.  Also solid-stating the power transformer rectifiers will reduce more waste heat generated in the receiver.  Total savings is close to 80 watts doing a back of the envelope calculation which is almost half of the power consumed by the R-390/URR.  Thoughts?
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy