Re: Purpose of the relay (6 Volt)

"JoJo" (joseev@xxxxxxxxxxx) writes:
I am experimenting on an older (1955) motor scooter that operates on a
6 volt AC magneto. I want to install a 6 volt AC horn. My question is:
Do I need a 6 volt automotive horn relay to produce sufficient punch to
power the AC horn? Is the purpose of the relay to muster enough voltage
to power the horn on demand?

Thanks much for the education you may provide.

Likely the relay is used so the wiring to the switch, which needs to
be handy, doens't have to carry all the current that the horn needs.

If you just had the switch, you'd have to bring the higher current wire
to the switch, and then another one of similar current capacity back to
the horn.

With the relay, placed right near the horn, you can use quite small wire
since it only has to carry the current needed to activate the relay.

Certainly, that's why relays were used to turn on and off old tube
type two way mobile radio equipment.

Michael


.

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