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Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
Here's my Improved rotary gap with the static gap added. This is in sorts, a variant of a RQ gap without the blower because its not the primary gap and is not intended to be. What it does is fire when the rotary misses. This is a major saving grace to the transformer, it will thank you for doing this. I etched a board earlier and proved out that the gap wouldn'f free itself from the solder. This was by far my biggest concern. It got hot enough to boil water sprayed on it after operation, but I am not concerned with the couplers freeing themselves.
Details:
Well, basically, I etched the board with 20 places on both sides, so that if it gets damaged on one side I can save time and re-do it on the other side.
Tinned the board with some 60/40 to flux it, then finished off with lead free, because I don't have flux paste lying around. This was a quick and easy solution.
Torched the couplers with propane till they turned almost brown, and checked temp with solder. When it melted I just grabbed the coupler with pliers and let it melt the solder pad underneath.
Torched the top slightly to warm it up some more then brazed the gaps in with more 60/40.
When it was in place and I was happy, gave it a squirt of water to freeze it in place.
Finished off with high current bussing from rotary to RSG with #12 silver teflon wire. This stuff could take 100A and not even flinch I'm sure.
The rest is pretty obvious.
Problems:
The HV side on the bottom right is having some arcing problems with the wood of the rotary. I can hear some sizzles. Most of the arcing noise comes from the HV coupler on the bottom right to the next coupler in the string. They corona to each other. I think one of the copper traces on the bottom is soucing some lekage current. So I will have to investigate that sometime. Right now its all assebled in my coil and its really hard to get to.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Looks nice. Is this a series arrangement of rotary and static gap? If so, then this gap would not be that great for a conventional tesla coil because it will quench too fast. Magnifier coils require fast quenching gaps, but if you use those types of fast quenching gaps on conventional coils, you really limit the performance.
Of course, if this is a parallel arrangement, then you'll be fine.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
Yea its a parallel. The static gap is to limit misfires when the motor is too fast or too slow
>>>>>>>>>Update<<<<<<<<<<<<
Well...wouldn'
t you know it, my new fancy static gap works like crap compared to the original. All it does is power-arc to itself.
I paralleled the two strings of 10 and got back maybe 60% of my spark as before, but I fear now that I have to buss the outside as one hot circuit, and the inside as the other circuit. Balancing the currents through this is going to be quite messy. I simply cannot do it. So I will make my best attempt, and I don't think that will be very pretty.
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Rotary Gap MK style
