354 Wall Phone - Confusing Modifications

[Bill]

You will need to either get a second capacitor for the ringer, or get one that has both sections from a 302 or a 354. The single section (2-wire) only handles the talk circuit.  The 356 used the tube instead of the capacitor (condenser).

A .5 mF cap @ 250 Volts is what you need.

Just as a quick reminder - if you buy a capacitor, it must be non-polarized. In other words, NOT an electrolytic capacitor, which is what the guys at Radio Shack will hand you first.

Bill

[HowardPgh]

I think the B3A ringer(2000 ohm) may have a different impedence than a B1A because of the tube being used in the circuit instead of the capacitor.
I wonder what the phone was being used for with those mods.

[winkydink]

I am sorry to say, that I cannot make heads or tails out of the diagram a couple of post ago as to how to wire up the phone.

I do have a normal 302  4 wire condenser that I could use.  If the ringer is different and requires a different capacitance that the normal 302 capacitor/condensor, then I will need to look for a different solution.

I am not (unfortunately) an electronics person and have trouble with schematics.  I know how to wire up a 302.  I also have done some tube radio work so I think (??) I may have a 0.5 mf nonpolarized (i.e. non-electrolytic) capacitor that I can use.  Would I just substitute this in ?  If so, where would the leads connect to (i.e. where on induction coil, or other parts of the phone would I connect the wire to.

My other issue is, if I cannot use the present ringer, then I am stuck with this phone, because all my other ringers are the "snap on" type not the crazy screw in bracket type that this phone has.

[HowardPgh]

I would wire it like a 302 and see if it rings. Won't hurt anything to try it that way.
In a 302 the 195A condenser is 1/2 mF for the ringer section (yellow and slate wires) and 2 mF for the talk section (red and black wires). Ringer Red>L1 Black>K. Capacitor Slate>K Yellow>L2Y. Capacitor Red>C on coil Black>BK on dial.
Good luck on your wiring. -Howard
see BSP 502-400-100, 502-400-401

The diagram a couple posts back shows a 304/354 with a four wire ringer.

[winkydink]

I would wire it like a 302 and see if it rings. Won't hurt anything to try it that way.
In a 302 the 195A condenser is 1/2 mF for the ringer section (yellow and slate wires) and 2 mF for the talk section (red and black wires). Ringer Red>L1 Black>K. Capacitor Slate>K Yellow>L2Y. Capacitor Red>C on coil Black>BK on dial.
Good luck on your wiring. -Howard
see BSP 502-400-100, 502-400-401

The diagram a couple posts back shows a 304/354 with a four wire ringer.

Thanks !  I will try that and report back.

[dsk]

Use your 4 wire capacitor, and wire it up as regular, if you don't want to put in a third set of contacts in the hook switch, you may just skip the third one. It will work wit any 2 of the 3, but I would prefere to skip the one between dial BB and coil GN and just put a wire between those two.

Almost any ringers will work with your "new" capacitor.

dsk

[winkydink]

Use your 4 wire capacitor, and wire it up as regular, if you don't want to put in a third set of contacts in the hook switch, you may just skip the third one. It will work wit any 2 of the 3, but I would prefere to skip the one between dial BB and coil GN and just put a wire between those two.

Almost any ringers will work with your "new" capacitor.

dsk

So DSK let me see if I have this correct

1)  Replace the 2 wire condenser/Capacitor with a "normal" 4 wire condenser


2) Wire the phone up as if it were a 302

3)  Use the B3A ringer

4)  Connect a wire between Dial "BB" and 101A Induction Coil "GN"

5)  Hope for the best.

[dsk]

  Yes!
No 4 only if you don't install the third set of contacts on the hook switch.

Good luck, and let us hear how it turns out.

dsk

[winkydink]

So DSK let me see if I have this correct

1)  Replace the 2 wire condenser/Capacitor with a "normal" 4 wire condenser


2) Wire the phone up as if it were a 302

3)  Use the B3A ringer

4)  Connect a wire between Dial "BB" and 101A Induction Coil "GN"

5)  Hope for the best.

Yes!
No 4 only if you don't install the third set of contacts on the hook switch.

Good luck, and let us hear how it turns out.

dsk

Silly question:

Why do I need a wire between dial BB and induction coil GN for the 2 contact switch case.

If I am wiring like a 302 , doesn;'t the 302 only have 2 contact switches ??

[dsk]

Silly question:

Why do I need a wire between dial BB and induction coil GN for the 2 contact switch case.

If I am wiring like a 302 , doesn;'t the 302 only have 2 contact switches ??

Definitely not silly question. I was at the 354 diagram, not the 302  
Just wire it as  302, that's it. Sorry for confusing you.

dsk

[winkydink]

Well I did wire the phone up exactly like a 302 and low and behold, it works !

It rings, it dials out and gets a dial tone.

I installed a modular backing plate over the 356 base plate (taken from an old 554 phone).  The phone will now go through a few days of testing before it is sent off to it's final destination.  I think my friend will be pleased with the final result.

Here are some "after" pictures.  I have the phone mounted on my portable "wall" that I made from some scrap wood, for a bit of testing.

[dsk]

  Great job!

Congratulations.

dsk