UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Kellogg wall phones

dagskarlsen · 14th Feb 2018, 10:50 am

Usually the capacitors are working for 100 years, this one has only on purpose, if you forget to hang up you drain your battery, but other parties are still able to ring, because the capacitor has a high resistance for the ring-frequency, but lets voice frequencies pass relatively easy. If the capacitor is bad, just strap it.

I am still curious about the printing on the (transformer) induction coil.

dsk

14th Feb 2018, 10:50 am	#20
dagskarlsen Heptode Join Date: Jan 2008 Location: Hakadal, Norway Posts: 643	Re: Kellogg wall phones - need help Usually the capacitors are working for 100 years, this one has only on purpose, if you forget to hang up you drain your battery, but other parties are still able to ring, because the capacitor has a high resistance for the ring-frequency, but lets voice frequencies pass relatively easy. If the capacitor is bad, just strap it. I am still curious about the printing on the (transformer) induction coil. dsk