John K.'s S1GT
Hi All,
I Hope you all had a good Christmas. Unfortunately I came down with the flu on the first day of my holidays but managed to spare a few hours in the shed on my "S1GT".
I now have it running on some good deep cycle batteries, configured for 36V on the front and back end. I ran it all day. The front end settled into 36.7V whilst the back end would not get above 39.7V. The cap is now 13,600uF 50V and dumps in just under a second. After resting for an hour the primaries recovered to 37.0V whilst the secondary bank is at 39.2V.
The SCR is now triggered with a 1N4732 (4.7V 1W zener) in series with 2 x super bright LEDs which dumps at around 8V over the top of the battery voltage.
One very interesting observation - the shield on the main coil has been permanently magnetized and shows that it is a MONOPOLE South pole ALWAYS! I could only pick this up with my compass when I had the coil and the bonded shield on my bench away from any other magnets. Weird!!
Back to bed...
John K.
Hi All,
I Hope you all had a good Christmas. Unfortunately I came down with the flu on the first day of my holidays but managed to spare a few hours in the shed on my "S1GT".
I now have it running on some good deep cycle batteries, configured for 36V on the front and back end. I ran it all day. The front end settled into 36.7V whilst the back end would not get above 39.7V. The cap is now 13,600uF 50V and dumps in just under a second. After resting for an hour the primaries recovered to 37.0V whilst the secondary bank is at 39.2V.
The SCR is now triggered with a 1N4732 (4.7V 1W zener) in series with 2 x super bright LEDs which dumps at around 8V over the top of the battery voltage.
One very interesting observation - the shield on the main coil has been permanently magnetized and shows that it is a MONOPOLE South pole ALWAYS! I could only pick this up with my compass when I had the coil and the bonded shield on my bench away from any other magnets. Weird!!

Back to bed...


John K.
Comment