"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: Alex G. Bell on June 13, 2017, 03:03:17 PMI suggest posting a photo of the underside. I'd expect that like the MC-131 it has two side-by-side coils and a permanent magnet around the back (as best as I remember the construction from years ago), no interrupter contacts in series with the windings.
Quote from: QUIKRIDE86 on June 13, 2017, 03:10:01 PMI can take a pic when I get home but what I saw when it was apart was a single coil (centered under the gong)with a freely moving pole piece that extended out both sides and was able to contact the gong either direction.....also there was no spring attached to it.
Quote from: Alex G. Bell on June 13, 2017, 03:57:26 PMOK. I've seen bells or ringers with that kind of construction. More important is whether it contains a permanent magnet and/or any contacts, and somewhat secondarily, the resistance. If it contains contacts certainly or does not contain a permanent magnet perhaps it's not a "magneto ringer" and not intended for operation from low frequency high voltage AC.However no issue with the ringer would be logically related to this:1) "When I plug it in to a standard land line I get a good dial tone and am able to dial out fine, speak, hear and hang up at the end of the call. "2) "On the other hand if I call in to it the bell does not ring (the plunger is free moving)," 3) "if I pick up while in the call I can speak and hear fine but if I hang up the Stromberg it does not disconnect. I can pick up again and the other phone is still on the line. Only when the other phone hangs up does it disconnect."(1) and (3) are at first glance contradictory to each other, depending on exactly what you mean by "other". Either it releases the line or it does not. If another phone is off hook on the same called line of course the line will not be released until both hang up. However release of the connection is normally mostly controlled by the calling end, with timeout from the called end, so unless the called phone hangs up for 20-35 seconds the incoming call will still be there when the called phone goes off hook again if the caller did not hang up in the mean time. So you need to clarify what you mean by this. One interpretation is that this is perfectly normal and any phone would do this.
Quote from: poplar1 on June 13, 2017, 04:35:40 PMNote the heavy black lines between L2--G and C1--C2 in the diagram. Did you install those two straps (short wires)?
Quote from: QUIKRIDE86 on June 13, 2017, 04:40:07 PMThe ringer doesn't have contacts under the bell or gong. I will check the resistance when I get home and snap a couple pics. When I moved it with no power I did feel some 'pull' like there was a magnet involved. I will check to see if the pole is magnetized also. As for the statements i made I meant that it seemed that on calling FROM the phone to another (my cell) I was able to hang up disconnecting the call but when I called the Stromberg from my cell phone and hung up the Stromberg it did not disconnect the call. From what you said about it taking 20-30 sec for the disconnect this makes more sense to me (and apparently is not a problem with the phone). I'll try to check those other things about the bell soon (about an hr or two) when I leave work. Steve
Quote from: QUIKRIDE86 on June 13, 2017, 04:45:14 PMI don't remember it having a strap from L2 to G but I'll check that when I return. It definately has a strap from C1 to C2 though. Steve
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: poplar1 on June 13, 2017, 05:02:16 PMIf the phone originally had a 3-conductor hardwired cord connected to L1, L2 and G -- but no strap from L2 to G --then to make the ringer function, it would have been necessary to connect the wires from L2 and G together at the wall connecting block. When converting a phone from hardwired to modular, it is necessary to bridge the ringer circuit and talk circuit inside the phone.
Quote from: QUIKRIDE86 on June 13, 2017, 07:56:05 PMYup, looks like the wires were connected at the block! I added a jumper across G and C-1 (which also jumps to C-2). Would this be correct?