The Hallicrafters S-40A
|Hallicrafters S-40A shortwave receiver|
Another problem that I need to work on with the Hallicrafters S-40A is the popping and crackling when it is first turned on. Even with the AF gain and sensitivity turned all the way dwon I get a loud popping and crackling sound coming through the speaker for 30 to 60 seconds or so when first powered up. Someone from the Hallicrafters reflector mentioned that I may have a electrolytic capacitor in the wrong place or even put in backwards, which would sometimes cause the crackling. Will have to take a look at that as well.
The hallicrafters S-40A is a great soundng receiver considering that this model was manufactured in the late 40's. It still sounds better than any other radio I have here for listening to shortwave, with the warm sof tube sound that only a tube radio can deliver. Not so great fo morse code work but excellent for shortwave listening.