Thread: Incorrect bell?
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Old 30th May 2019, 3:45 pm   #21
dagskarlsen
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Join Date: Jan 2008
Location: Hakadal, Norway
Posts: 640
Default Re: Incorrect bell?

I did measure at 25Hz 70V, The transformer mentioned over, load 47 ohms resistor, and I used a 2.2 uF capacitor in series with the transformer.
The current was about 0.022A and the load is approx 3650 ohms or a REN load close to 2 after the old standard.

I guess a 240 to 24 small transformer from an adapter will do the job.

I did also try to change the 47 ohms resistor with a DC ringer of 37 ohms, and it rang loud enough.
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