Thank you for your kind words Robert (G0UHF).
At present, the drawings are really 'final provisionals'. As a design develops, a drawing often gets to the point where there is so much 'Tippex' on it, the sheet stands upright, all by itself :omg: - that it's time to do a re-draw. I then scan that re-draw into the computer (as a master) and then issue it, via the printer, as the next issue, and go back to the bench with it. And so on, ad nauseum. That way, you can always keep track of what was before, should the next 'revision' turn out to be a non-starter. When the item is finally declared finished, I then produce a manual for the item - including operating instructions. This approach is simply a by-product of a life-time spent in electronic engineering. Despite every effort that should render future access to such documentation unnecessary, experience shows that there will come a day when a repair or modification will be required - hence a decent set of drawings, etc. Years ago, my attitude was "O.K., that's done. I'll never need to worry about how it works, what I did or what it does". Wrong: there is always a 'next time'.
In a phrase, 'the job isn't complete 'till the paperwork is done'.
As for the degree of complexity in the unit, it could be drastically simplified for anyone who has fewer transformers to test or just needs something for occasional use. The initial block diagram illustrates the basic concept, in which the two meters could easily be replaced by a.c. measuring voltmeter and ammeter (single range for each) and only a few dummy load resistors included. My design was simply geared to what I had available.
I claim no intellectual property rights for this item, so if anyone wishes to build their own - please go ahead.
Al.
At present, the drawings are really 'final provisionals'. As a design develops, a drawing often gets to the point where there is so much 'Tippex' on it, the sheet stands upright, all by itself :omg: - that it's time to do a re-draw. I then scan that re-draw into the computer (as a master) and then issue it, via the printer, as the next issue, and go back to the bench with it. And so on, ad nauseum. That way, you can always keep track of what was before, should the next 'revision' turn out to be a non-starter. When the item is finally declared finished, I then produce a manual for the item - including operating instructions. This approach is simply a by-product of a life-time spent in electronic engineering. Despite every effort that should render future access to such documentation unnecessary, experience shows that there will come a day when a repair or modification will be required - hence a decent set of drawings, etc. Years ago, my attitude was "O.K., that's done. I'll never need to worry about how it works, what I did or what it does". Wrong: there is always a 'next time'.
In a phrase, 'the job isn't complete 'till the paperwork is done'. As for the degree of complexity in the unit, it could be drastically simplified for anyone who has fewer transformers to test or just needs something for occasional use. The initial block diagram illustrates the basic concept, in which the two meters could easily be replaced by a.c. measuring voltmeter and ammeter (single range for each) and only a few dummy load resistors included. My design was simply geared to what I had available.
I claim no intellectual property rights for this item, so if anyone wishes to build their own - please go ahead.
Al.
