I'M REDEFINING ATLANFA AT-58 radio receiver. I'm solving the issues of hum and volume.
The radio is humming. The volume level decreases spontaneously. I eliminate these inconveniences. I remake the radio in my own way. I make a change to the circuit. +++!!!+++ As a result (later) the DOWN volume button had to be disconnected, and the contacts of the UP volume button had to be shorted together, creating the effect of this button being constantly pressed (on). After that, the radio works normally.