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Registered Member #1989
Joined: Fri Feb 20 2009, 05:28AM
Location: Edmonton Alberta, Canada
Posts: 17
Is it wrong to ask if anyone has an extra driver board or two kicking around to help get my coil running? I am thinking my current driver board is the root of my problem and with no experience in board layout programs I am lost... I would like to at least eliminate the possability that my homemade patch job board is the problem.
(Edit): Here is a link to my previous thread that will explain all the isues I was having. I was using an antenna feedback but have since changed to a secondary base feedback transformer.
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Depending on what kind of SSTC you're building, it could be a simple polarity problem. I had issues with that. Check your GDT and primary windings. I got my coil going great with just a MOSFET driver and a halfbridge circuit. And make sure your antenna isn't blocked and is reasonably close to your coil. What problems are you having? Is your coil not putting out anything at all?
Registered Member #1989
Joined: Fri Feb 20 2009, 05:28AM
Location: Edmonton Alberta, Canada
Posts: 17
The coil I am trying to replicate is Steve Wards mini sstc. What I am looking for is if someone has had a few extra boards that they had etched from pcbatch? they are willing to part with. Or have a pcb layout file they are willing to share. Any one in for a group buy?
Registered Member #1134
Joined: Tue Nov 20 2007, 04:39PM
Location: Bonnie Scotland
Posts: 351
No boards I`m afraid, as I just use perf board, and there is no reason why you shouldnt get yours working on perf either. Yours looks very neat by the way.
I have had a look at your pics, and there are two things I`m not seeing, but the photos are small so I may have missed them!
First off the current transformer looks like it is feeding directly into the hex inverter, it should first, pass through a 1k resistor, and a 0.1µF cap, on mine I found a 100k resistor to ground on the hex inverter input improved dodgy feedback as well.
The cap for the GDT should be polypropylene, yours looks like a tantalum?
Try reversing the primary winding if the coil fails to operate.
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Help with Mini SSTC driver board
