T: picture 1, top
Ring relay #2
Amplifies the sound of a ringing phone with a 230 volt light bulb.
When a phone is ringing, the bulb immediately starts to light.
You can alter the turn-off time between zero and infinity. But the
bulb is always immediately turned off, when someone has picked
up the phone. The device can be connected anywhere in the tele-
phone network.
T: picture 1, bottom
"0" = a free phone line
"0R" = a free phone line with ring signal
"1" = a busy phone line
fg = "gränsfrekvens", in english: cut-off frequency. In this case:
signal frequencies below fg will pass,
but not those that
are above
T: picture 2, middle
the 230 volt-
circuit track:
see RSR 2B
T: picture 2, bottom
This potentiometer sets
the lighting time ("tfrån")
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