"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by darticus, October 12, 2017, 06:03:37 PM
Quote from: poplar1 on October 12, 2017, 06:48:21 PMThe ringer does need a capacitor of approximately 0.5 uF in series with the ringer. You can connect the ringer+capacitor directly to the line. It is independent of the talk circuit of the pay phone.Green line---><-----black ringer wire------RINGER-------red ringer wire-------><-----capacitor---->Red lineThe slate (gray) and slate-red wires on the ringer are not used.
Quote from: darticus on October 12, 2017, 07:38:45 PMThe ringer I have only has two wires and rings with 6 to 12 volts I think. Use your wiring? Thanks Ron
Quote from: poplar1 on October 12, 2017, 07:59:00 PMI thought you were talking about the ringer in the photo. That one operates on 90 Volts AC, 20 or 30 Hertz.I don't think a 6 volt or 12 volt doorbell will work on a phone line.
Quote from: darticus on October 12, 2017, 08:31:56 PMI didn't know that much came through the red and green line. Thanks Ron
Quote from: dsk on October 13, 2017, 02:42:25 AMTelephone ringers are usually made for low frequency 15-30 Hz 60-90V witch vary from country to country. North America is typical 20Hz at 90V. Most European countries use 25Hz 90V (Germany 60V)Still telephone ringer usually accept a wide range in frequencies and voltages. All telephone ringers has a capacitor rated 200V or more in series to block for DC currents. The micro Farad values may vary a lot, but in North America close to 0,5 is the most common, and the double in many European countries. But again they usually works in all those systems. To match newer systems many people add in resistors in series with older ringers. (I usually do not)The ringer pictured (from oldphoneworks.com ) is the typ I have used, this is usually used together with a 1 microFarad capacitor.dsk
Quote from: darticus on October 13, 2017, 06:39:18 AMDoes this bell cost a lot? Does it come with cap and instructions? Maybe thIS will do. Thanks Ron
Quote from: TelePlay on October 13, 2017, 08:48:35 AMA 0.47 uF cap for the ringer is cheap.If you can wait a month, you can get them for 10 cents each ( qty 10 ) from China http://www.ebay.com/itm/10-Pcs-250V-0-47uF-474J-Metallized-Polypropylene-Film-Capacitors-DT-/262454189871or 80 cents each ( qty 5 ) from a US seller with a few days delivery. http://www.ebay.com/itm/0-47uF-630v-5-Metalized-Polypropylene-Film-Capacitors-P20-5-Pieces-47uf-/272716568688The external ringer box as mentioned by HarrySmith should have a cap in them.
Quote from: TelePlay on October 15, 2017, 04:51:38 PMIn this wiring configuration above, wouldn't the slate and slate-red wires be hooked together to make the circuit complete?The capacitor is between A and K in the network so if wired as an extension ringer, the circuit would still have to be complete? Am I wrong on this?