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Can any one mail me the plans please.i want to try build this firstname.lastname@example.org
Thanks. Very informative
Good to know that you enjoy your radio with its new functionality. I respect your decision, but I personally can't stand seeing what you did to that great radio. Call me a purist, but I feel what you did is like taking a classic 1940's cadillac and dropping the engine off a 1997 Toyota Camry.
VERY VERY GOOD POST!!! be good and have fun... i enjoy reading it!
I would like to say thank you for this great tutorial ... I proudly made it as project for the end of this semester .. It is working very well and it is rising hair very well also .. I've made some simple modifications like using a rubber belt instead of the vinyl and a Teflon tape wrapped on the polyamide roller instead of a Teflon roller .. This was cheaper ... At the end I want to say really thank you for this
Nick, I saw your car setup. If you had an extended bed pickup, you could just strap it in and go.
HiI looked at Teflon Roller, 2NJA2. It is no more available. Also does it need to be Brother Sewing machine for parts? I have a Singer machine to spare.Thanks
Huge thank you nickademuss. Your great write up instructed me on the basis of VDG operation and the design enabled me to complete my first ever VDG build. Managed to capture a couple of pictures of the unit in action. The sparks almost don't look real but they are.
Ok, sorry for the multiple comments. Well I could not stand to wait for the weekend so I implemented an alcohol clean of the VDG and hey presto it now works like a charm. It's not as wild as your build but I'm happy with it. https://www.youtube.com/watch?v=O0fP76EpC2E watch in HD otherwise video compression cuts out the spark. I've read it before, oil and grease is a VDG killer. Question: Should I try the vinyl coated polyester belt again? (cut the width down so I am sure it is not touching the edges of the tube) Or now I have a working setup with a rubber belt, should I just leave it alone?
Hi Nickademuss See images posted below, (not sure why some are showing up twice sometimes).. I'm still waiting for my 12" gazing globe but the Ikea bowls were doing pretty well. I did not touch them between experiments. Bottom roller is nylon, top is a PVC pipe wrapped in teflon tape. The top roller is on bearings, see pictures, I heated a pvc tube and pressed skate bearings into it, worked really well. Belt is rubber exercise strap glued. Top comb uses brass pins soldered into a pcb board with a copper plate backing. Bottom comb is similar but standard tin pins. I do not think I have leakage from the bottom of the bowl thanks to the copper ring, but I know it's pretty small. Things I know I need to fix. Bottom comb is too far up on the belt, i'll lower it this weekend. Again, it was in this position when I was generating the big sparks. Tube sticks too far into the bowl, I misread your instructions and thought the tube was supposed to stick up far into the bowl. I'll raise it this weekend when I have the system apart for cleaning and finishing. Any advice would be appreciated. Also, have a look at the pic with the white belt, do you think the belt is running too close to the tube walls which is why I built up no charge? The issue is that bottom nylon wheel is wide, 3" wide. It's great for belt tracking, zero issues, thanks to this combined with the top roller with bearings. However it leaves the belt very close to the tube walls, belt is 2" wide. Anyway, let me know what you think. Best Regards Mick
Hi! Thanks for the fast response. I'll take some more picture and post later today as I didn't document the build very well. This is actually version #2. Version #1 was a quick build and produced reliable 1" sparks. #2 build changed top and bottom pulleys to support a Vinyl coated belt (just like yours) however the belt produced zero charge. I swapped back to a rubber belt. I think the combination of the larger pulleys and wider belt left the belt rubbing on the sides of the tube. I might modify again to try again with that material. With the rubber belt I now think I have a dirt issue, maybe oil on the pulleys. I no longer get an initial large charge. Anyway, when I strip down the build to clean I'll take pictures. Thanks for taking the time to offer your assistance.
awesome little radio!
Thanks for looking! and the kind words. Keep the working radios working is my motto.
should be fine, but it can send a charge threw the house current and zap things connected to the same circuit in your house ):
I called it cheap because I scavenged most of my parts like the motor, wood base, pipe, and anything else from the junk pile. The sphere and rollers being the most pricy parts. The belt can be made from vinyl covered fabric from an old shower curtain. I guess if you don't have a junk pile it could cost a little more, or you could power it with an old thrift shop drill (3$) or a sewing machine(10$)....
This one throws 12" sparks at low current, the base is considered ground or minus and the sphere is positive. if they are to close you cant get any charge built up. So you need at least 2x the height as the sphere diameter, this will give you a chance to develop a charge.
Odd, try running it in total darkness, it sounds like you have a High voltage leak. You will see the leak as blue light streaming off of it. It would help is you posted pictures of your build...
Hi. I've loosely followed your design, thanks. My setup works great when I first turn it on but after the first couple of large spark discharges the intensity starts to drop off. Any idea why this might be?
I inherited something similar from my grandmother. It has great sentimental value as my mother and her family sat around it during WWII to listen to the war news. A lovely vintage radio console with a magic eye for tuning. The fabric wiring was pretty shabby and a local man rewired it for me and put a nice piece of imported authentic cloth over the speaker. All up less than $100 and he replaced the bulb in the magic eye. I also got the cabinet French Polished which cost me $1000. It works like new and looks great in my front room and it's all ready to pass on to the next generation. You've done a really nice job there.
Taking your HO scale slot car track to the next level cheaply
For those in Australia - try these (you'll need 2!!)http://www.kmart.com.au/product/28cm-stainless-steel-bowl/124198At $5 each that's a BIG saving on a Gazing Ball, and the stainless is fairly soft, so easy to polish to a mirror finish. As described this VDG Project relies on triboelectric excitation, so if you live in a humid climate (Tropical Queensland :-( ) you'll find charge transfer is poor. In such a case providing a "little help" via HV DC electron spray will offset leakage. Try one of these - http://www.ebay.com.au/itm/AC-220V-DIY-Air-Ionizer-High-Output-Airborne-Negative-Ion-Anion-Generator-New-/400598863890?hash=item5d458d9012:g:dQYAAOxyM89Scw27Substitute an aluminium roller for the bottom roller, and attach one output lead to the roller axle, the other to your comb spray. Charge transfer is MUCH more efficient, and recovery is faster too.
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