OCR Text |
Show ! Soldered Connections Important in Radio Set The first Important factor for getting get-ting the best results from a receiving set is soldered connections. Every point should be carefully cleaned and then securely soldered. Antenna joints should be carefully soldered and a proper ground clamp installed. There are at least 22 contacts in a five-tube ' set which cannot even be soldered. Twenty of them are tube prong contacts, con-tacts, and the other two are the bat-' bat-' tery switch and the rheostat. Dirt on ; any one of these will be a fruitful source of noise. Many tubes have solder (lead alloy) on. their base i prongs. This solder rubs off onto the j socket contacts, oxydizes, and makes a high-resistance, noisy connection. The battery switch is often liable to j "dirty up" after being cleaned. The I same with the rheostat. A dirty switch or rheostat contact causes : noise in a receiving set. |