"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by QUIKRIDE86, June 12, 2017, 11:31:28 PM
Quote from: unbeldi on June 13, 2017, 09:44:43 AMThat "ringer" appears to me as a buzzer as often used in key systems. It is a part used by the Army Signal Corp. Perhaps it was installed to operate from a special signaling circuit with a DC power supply. Is it even connected across the line ?It should not be too hard to find the proper straight-line ringer for these sets.
Quote from: unbeldi on June 13, 2017, 10:18:55 AMIt hard to judge the size of this VP2, but it seems only about an inch across. The manuals (ca. 1950) I have of the EE-8 types specify an MC-131 for the ringer, which is a single gong used as cover over the two-coil motor and looks quite different.
Quote from: QUIKRIDE86 on June 13, 2017, 09:06:43 AMInteresting, do you know what voltage that type of ringer would run at? I could find no specs on it anywhere. I could disconnect it and try testing it with a power supply to see if it rings on it's own. Steve
Quote from: TelePlay on June 13, 2017, 09:39:41 AMAre you using a standard POTS landline or do you have a VOIP line?
Quote from: Alex G. Bell on June 13, 2017, 10:25:31 AMIf the screws mounting the network visable above are #6 the shanks are about 1/8" dia. and heads are about 1/4-5/16" diameter and so are the ones holding the gong (if that's what it is) in place. From that it seems to me to be a lot larger than 1" dia., like 2 or 3". The MC-131 was about 3".One could also pull a 1243 and look at the hole pattern for the grommetted base plate holes, which I think are for the ringer.
Quote from: dsk on June 13, 2017, 12:08:35 PMThe ringer is the type used in US army field telephone EE-8, mine has a DC resistance of about 1200 ohms. The spec says 50 V at 20Hz.I tried to measure mine together with a 1uf cap, and got something like 1.6 REN load.That load may be tough for an ATA, but a POTS line should not make any problems.If you remove the gong you could see if the armature is moving freely, and it should buzz instead of ringing.dsk
Quote from: QUIKRIDE86 on June 13, 2017, 02:58:02 PMI had it apart to clean and the armature is moving freely.