25-05-2013, 12:18 AM
Thanks Gary & John for the encouragement.
Another duff tranny, now the signal strength meter works along with the stereo decoder. Still got a nasty with the -24V supply(AM)??? The unsmoothed output at the reservoir cap is 10V low and the -24 is a few volts low. Removing the load everything is hunkydory. As I reconnect the various sections then the V drops and hum comes up.
The main cap is OK, the PSU appears to sink as much as it outputs, ie. 150 mA in and 70mA out. Offload, the current that is sunk is a few mA.
Have to get the scope out tomorrow and try and work out what is happening.
Mike
Another duff tranny, now the signal strength meter works along with the stereo decoder. Still got a nasty with the -24V supply(AM)??? The unsmoothed output at the reservoir cap is 10V low and the -24 is a few volts low. Removing the load everything is hunkydory. As I reconnect the various sections then the V drops and hum comes up.
The main cap is OK, the PSU appears to sink as much as it outputs, ie. 150 mA in and 70mA out. Offload, the current that is sunk is a few mA.
Have to get the scope out tomorrow and try and work out what is happening.
Mike
