Hullo.
I have an existing, failing, video phone entry system. Not completely broken, but it needs replaced.
The handset uses a 18v power supply, which the long ago installer embedded someplace unknown, and I don't want to hack the plaster off to find out where.
Could I replace the handset with a 16v system? i.e. I found a potential replacement, but it only needs 16v - could I plug the 18v supply into it and expect it to work properly?
I measured the supply and it actually reads 18.5v
Any advice appreciated.