"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by RB, January 28, 2021, 08:32:12 AM
Quote from: markosjal on February 05, 2021, 04:22:08 AMMost early hooks are 4 wire There is... the only difference is that one set should hopefully make contact after the first set when phone goes off hook. Ideally this same set that Makes Last should also Break first meaning when hung up, it should be the first open set.This set is Breaks first and makes lastThen there is the other set that breaks last and makes firstThe purpose of this is connect the phone spkr element AFTER the phone goes off hook and to break the connection to speaker element BEFORE the phone goes back on hook.
Quote from: poplar1 on February 06, 2021, 04:44:19 PM (unless maybe you add a varistor in parallel with the receiver to reduce the pop somewhat).
Quote from: poplar1 on February 06, 2021, 04:44:19 PM.... There is no way to avoid the pop in the receiver (unless maybe you add a varistor in parallel with the receiver to reduce the pop somewhat)....
Quote from: Jim Stettler on February 07, 2021, 10:54:22 AMSome collectors use the varistor from an old g-type handset.I have never tried it, but that is probably the easiest source to find a varistor.Jim
Quote from: markosjal on February 07, 2021, 09:54:35 PMThis is ABSOLUTELY FALSE!Look at MOST ANY telephone diagram and you will see two sets of hookswitch contacts (although some may even be only 3 conductors ). One set of contacts has the function of muting the pop and the other the function of connecting/disconnecting the line. Of course you will not find this on a trimline reset on handset but most every other phone.This is much like the dial where the receiver element is either shorted or disconnected to avoid that LOUD POP for each pulseSince I have no candlestick 3 conductor to look at I would bet that even the candlstick 3 conductor swich performs the same function using only 3 wires much the same way as some Asian dial do the same with three wires (3 wire asian dial in hand!)