I bought this at the weekend from a boot fair in South London for £5. Its clearly an F33 type bell but what setup is it from and is it wartime or post war?? Either way I think its a nice piece.
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Morning all - this bell is causing me to scratch my head, I use my 10 line exchange and dialler unit as my land line, I have an ordinary bell connected as per the manual which rings for incoming calls. I have connected this unit but it only makes one "ting" then stops. I use a 9v battery to power the bell, is there something I have missed here? is 9v not powerful enough to energise the circuit? is there something missing?
Any assistance gratefully received.
Andy -
Hi,
this is an AC bell, as well as the ones in the FF33, and not a DC, like the remote bell for the Klappenschrank. DC bells may work with AC power input, but AC's not with DC, they just say one "ting".
If you apply the proper AC (I don't know the type, so neither the proper ~voltage, but you may try with the crank of the FF33 rotating it slowly), and still not OK, take out the bell cups, and check if the ring prong (I don't know the name for it) is moving left&right freely. If so, put the cups back, tighten the screws (but not fully), and rotate the cups until it tingles nice. The holes of the screws are not coaxial! This is how you can set the cups.
CsabaComment
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This ringer is a typical phone ringer with an optical device. If you have more than one line you would easily see if it is this one' ringing or not. I guess this has a relatively high dc resistance, but it is definitly made for ac. Typical 60-100V at 15-25 hz, so it should work well on the line of a field telephone.
If you want to us it on your regular telephone line at home, you need to add in a suitable capacitor in series with the ringer. (My guess: bipolar (0.4-) 1 uF rated at 200V or more)
KabelComment
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Thanks for the advice guy's, much appreciated.
AndyComment
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Kabel - should the Capacitor be AC or DC I am assuming DC but just wanted to check.
AndyComment
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The current is AC so the capacitor has to be unpolarized.
With no more knowledge about the ringer, 1 microfarad would be fine, if you are connected to UK BT POTS with a master socket it will be no need for a capacitor. Just connect between line A and bell wire: http://www.davefrydoes.co.uk/wp-cont...st-Version.png
Regards
kabelComment
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