701B not breaking dial tone

[rdelius]

There is a spark surpressor network between F and RR.When you dial the contacts open and close. Sparks might be produced and this can be dangerous or cause bad contacts. I suggest putting the wires under a unused terminal on the network such as "g" (ground ) pull the yellow line cord off if it is still connected there.

[Ktownphoneco]

VERY GOOD RDELIUS !      Sorry Scott, I wasn't aware of that circuit being present in the 701B and missed it completely.     Glad you were able to get it working correctly.

Jeff

[Scott]

In your opinion would you keep the yellow wire in place and add the two wires from the F terminal if you still wanted the light to work? I tried it and everything functioned the way it should. Any possible long tern consequences I should worry about? I also looked back in the archives and found in April of this year someone else fixed a problem by by-passing the F terminal. Is the spark suppressor the only thing the F terminal does?
Thank you for your help. CRPF rocks!

Scott K.

[Jim Stettler]

There is a spark suppressor network between F and RR.When you dial the contacts open and close. Sparks might be produced and this can be dangerous or cause bad contacts. I suggest putting the wires under a unused terminal on the network such as "g" (ground ) pull the yellow line cord off if it is still connected there.

I think the Bell reason was to protect the contacts.
Just my guess,
Jim S.

Can the spark suppressor be replaced with a discrete  component to keep the circuit "proper" .  Something like adding a ringer cap to replace a bad cap on the network.

[Key2871]

Well that's great. I didn't know that those has suppressors in them.

[rdelius]

It is an LC network (Inductor-Capacator) filter circuit. The capacitor is a much smaller value than the ringer capacitor.I would not worry about bypassing it.Many older circuits did not have this.

[Scott]

Another nice telephone saved for future generations to enjoy. It's little, It's lovely, It lights, and thanks to rdelius it dials. Thank you to everyone that gave their input. I learned some great information I can use the next time a dial is not working properly. Be safe tonight!

[Doug Rose]

Scott....it is a beauty!....Doug

[Key2871]

NICE Scott, glad you got it working again.