Getting the Ol' circuit Running
Dear Mike,
Good idea on seperating the secondary load and a 12V kick starat for a shakedown test. The base wire to the PNP transistor is connected as you said. In the photo it is the white coil of wire around the upper part of the ignition coil. The 2N3055 and PNP transistor are mounted on the heat sink at the left of the photo. The attached potetiometer is 25 Ohm. Other components are the HV bridge, 1st stage storage capacitor, and spark gap with micrometer. The big green donut on the right is the Pearson Wide Band Pulse Transformer Model 150 for current measurements through the primary of the ignition coil.
The "Big Deal" with the 2N2907 is that I have a lot of them already - I got lucky at flea market. I shall see if I have a TIP41 (good chance) on hand.
Thanks for reviewing this setup.
Mark McKay
Originally posted by mlurye
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Good idea on seperating the secondary load and a 12V kick starat for a shakedown test. The base wire to the PNP transistor is connected as you said. In the photo it is the white coil of wire around the upper part of the ignition coil. The 2N3055 and PNP transistor are mounted on the heat sink at the left of the photo. The attached potetiometer is 25 Ohm. Other components are the HV bridge, 1st stage storage capacitor, and spark gap with micrometer. The big green donut on the right is the Pearson Wide Band Pulse Transformer Model 150 for current measurements through the primary of the ignition coil.
The "Big Deal" with the 2N2907 is that I have a lot of them already - I got lucky at flea market. I shall see if I have a TIP41 (good chance) on hand.
Thanks for reviewing this setup.
Mark McKay
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