Good morning, we are told there is very little chance of rain today and the wind will stay below 20 mph. Yipee - except the branches on a tree across the yard are still thrashing around, either it is having a fit, or the weather heard a different forecast :confused2:
Unkind weather has been giving me a chance to play at something I have been wanting to try for a while. I have accumulated a number of cartridge cases that are getting stiff to resize in the reloading press, the mouth of the cases need annealing. Electro-magnetic induction annealers have a lot of appeal, being a lot easier to adjust precisely compared to a gas torch, so I thought I would try and make one.
I have a friend who worked designing high frequency power supplies for many years. He retired last year, so a couple of weeks ago I showed him what I wanted to do, to see if it would get his interest going too. No it didn't, his satisfaction came from keeping things cool, not getting brass almost red hot. After a bit of web searching and looking at other's homemade devices, I soon realised the power components came to about the same cost as this cheap 1000W induction heater board.
It even came with that copper heating coil, though it is too big for my use, so I set about calculating how little energy it should take to heat my cases and how many turns it would need on a much smaller diameter coil. Haven't done that since our circuit theory classes back in 1974, although now the internet makes it easy to rediscover such things. Now came one of those inexplicable coincidences in life. I have been gradually getting rid of books in the woodburner that not even charity shops would want. As I tore out a few pages to light the fire from a book I haven't used for 46 years, there on the paper was the exact same formula I had been using the night before !
Two people in our county confirmed with the virus. It seems there are now two drive-through test centres within 25 miles of here, performing tests on suspected cases. No longer seems a question of if we get it, only when.