DX160 Repairs, Modifications and Improvements скачать в хорошем качестве

DX160 Repairs, Modifications and Improvements

The DX160 went out of production in 1980. In my opinion it is one of the best analogue consumer radios ever made. The FET front end really makes the radio quite sensitive. The radio does drift slightly, but less than many other radios made during the era. This video details the changes, improvements and repairs I have made over the course of about three years. If you are wondering about the foil on the back, it's to stop the AM radio signals interfering with the internal loop. I used to have an external loop and it's best to shut down the the reception on the ferrite rod. The xenon bulb across R2 will discharge static build up, and this arrangement allows for more sensitivity on the AM band. (The original mod says 2 s-points). The volume control had to be replaced as the original was scratchy. The original control incorporated a DPST switch, but finding a direct replacement was impossible. In the end I settled for a SPST. The radio lights are switch via a 100K resistor and a is triggered by the radio power on. The original pilot lights were replaced with White LEDs, and I am not entirely happy with how it looks, they don't seem to provide quite enough light at night. I may replace them with some 'warm' ultrabright LEDs. By the way if you want the light to disburse more than usual, try roughing the LED casing up with sandpaper or a small file. It did help. The electrolytic caps were all changed. I didn't have enough low ESR types, but did manage to get them into the more critical areas, such as filtering for audio and decoupling the power to the BFO section. The BFO section had a fault. One of the diodes had a dry joint, when soldered in place it came good. There was also a faulty transistor in this area, and it was replaced by a generic equivalent. The final thing I plan to do is repaint the case, then I will consider it finished. I am considering a nice hammertone finish.