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Replacing the Receiver

The receiver on the Ericofon is permanently glued into the case of the phone. It can be replaced relatively easily, but it's a delicate process and must be done carefully or the phone will be scared from the "surgery".

You can use just about any standard receiver element in this phone. The best thing to do is go to a thrift store and buy an old Western Electric Trimline phone (about 3 bucks) and rip the receiver out of that. I do sell receivers also (shameless plug alert).

I will describe below the method I have developed for replacing the element. Phones can vary a bit, what you find inside may look a little different, but it's all pretty much the same process. The phone I have used in my example is a North Electric model.

There are no guarantees with this method. There is always the possibility that the plastic will break, that's a chance you will have to take.

Before I start, there are a couple of warnings I should let you in on that I have learned from experience. First off, the flat earpieces are nearly impossible to remove without doing severe damage to the phone. The wedge shaped earpieces are relatively easy to pop off. My guess is they changed the glue used when they changed earpiece design (for more on earpiece design, see the section on "cases" in the "colors and styles" area). The second warning is that not just any receiver will work in the case of an Ericotone tweeter. If your phone has no ringer, or has a buzzer, you are free to use any receiver. It seems though, that to use an Ericotone tweeter, you need a receiver of the correct impedence. Some receivers will not reproduce the tweeter sound. Experiment before you go sealing it up.

recrep1.jpg (13649 bytes) The earpiece is glued on around the perimeter of the opening. Wrap the end of the Ericofon with a rag or soft cloth to prevent marring. Apply pressure with a C-clamp at the points shown with the arrows. Tighten very very slowly until you hear a distinct "crack" or "pop" sound. This is the sound of the glue breaking hold at some point. Go any further and the next sound you hear will be that of plastic breaking!
recrep2.jpg (21571 bytes)

Using a very sharp knife, work your way around the perimeter trying to find the spot that broke loose. Use the cutting edge of the knife, not the point. Work the knife into this spot and pry up gently. Work your way around the earpiece doing this. Since the bottom of the earpiece has a tab that hooks into the case, you won't be able to pry this up. I recommend getting the 2 sides and top loose, then pull outwards to break the bottom loose.

+++++WARNING +++++


The knife work should be done very carefully. Besides making a bloody mess of your fingers, it can make cut marks in the casing of the phone.

recrep3.jpg (17454 bytes) It's easier to work with the earpiece out of the case. The contact pads on the inside of the phone are only press fitted in, so you can pop that loose and pull the wires and all out of the case.

Next, go around the perimeter of the receiver mounting with a hacksaw blade or coping saw, cutting in about 1/8th of an inch. You won't be able to go all the way around because of the design, but that's not necessary. About 75% of the perimeter is enough to cut.

recrep4.jpg (18049 bytes) After you have taken off the part you've sawn loose, you can pry up the receiver element. At this point, you will want to swap the wires from the old receiver to the new one and hot glue the receiver back in place. Be careful not to short yourself on wire length if the design of the new receiver has the terminals higher up.

Carefully glue the earpiece back on the phone with 2 part epoxy.

If the receiver element should become loose and rattle inside the case, this is easily cured by stuffing small bits of bubble wrap up the neck of the phone, then tamping it in place with a pencil. This will push the receiver into place and hold it there without adding any weight to the phone.

Good luck!


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