RF Circuits

The receiver pictured is a Realistic DX150A. Its a general coverage receiver from the late 1960's/Early 1970s. It is a simple, single conversion analogue set covering from Medium wave up to 30 Mhz. I bought it on Ebay as a "spares or repair/not working". Externally the receiver is complete and in good condition although it was quite dirty!
When it arrived here I connected it up to a 12 volt supply and was surprised to find it does work! It does however need quite a bit of attention, there is a broken tuning core inside and the BFO does not work so it only receives AM at the moment. The receiver has been modified in the past. You may be able to see the two BNC sockets on the rear. One of the BNCs is for an antenna, the other, well I'm not sure but I think the receiver may have been modified to take a digital frequency counter.


I haven't tried to connect the receiver to the mains supply yet. For one reason it has an unusual connector for the AC lead (I think this may be another modification) secondly there is a possibility that the transformer may be for a 110v USA type supply. I have a friend who has a variac and one I have sourced a mains connector we may be able to see what the correct operating voltage is using that.

I am hoping that trying at least to improve the receiver will result in some fun and some learning along the way.