I started with a 16 V 10VA or 15 VA and assumed that was the issue and installed a 16V 30VA transformer. I have tried with and with out the power kit. The Fuse was a straight no go from the start because of the massive voltage drop across it. I Have tried 2 different digital chimes and 1 mechanical chime. 2 different power kits, well technically 3 different power kits cause I tried one from a different brand door bell cam. I love problem solving and do not like a piece of electronics to beat me. I am going to do my test board in the garage with coiled wire so it will be about the same length as I installed in the house. I bought a 500 foot spool cause it was the first one I could grab same day, pretty sure I only did about 75 foot of wire for the house install. I originally thought the original wiring in the house was the issue because of being an unknown age. I am using solid copper wire and not clad because I know that will make a huge difference. Hell I even installed a new drop for the transformer to ensure it was getting clean power. I think it may come down to a wifi issue in the house was making the doorbell work harder then it should have to stay connected causing it to keep drawing power to the point it would power down, just a theory I have about what was going on. I have since fully upgraded my home network and now running on TP Link Omada APs on my entire property. Was using Linksys equipment before and since swapping to the Omada I have noticed my google displays no longer randomly reconnect to the network like they used to do. that is the reason I came up with the theory on the wifi being an issue.
I have 3 different brand doorbell cams at the house currently and will test each one to see what kind of results I get.
2 X EZVIZ DB1
Amcrest
Zeinith
After a few weeks I will post back what kind of results I end up with. I deal with line voltage, both 48V Pos and 48V Neg circuits, 24 12 and 8 volt circuits with the equipment from work so I am pretty good at trouble shooting low voltage circuits both AC and DC.