Re: [TCML] Rotary gap electrode holders

[jhowson4@xxxxxxxxxxx]

your idea with the set screws is sound, I have seen someone use a large brass bolt, drill a hole for the tungsten, use the threading on the brass to secure to the rotary disk. and then use a set screw to secure the tungsten to the brass. 
it seemed pretty solid. 


To give you ideas here are some pics of my gap. The stationary electrodes are .75" long placed into a brass sleeve and held with a set screw. The gap spacing is adjusted by the sleeve it self. 
The rotary electrodes are in aluminium, these never need to be adjusted as they are vertically mounted, This was done to aid in preventing radial forces from flinging them in the event a screw became lose. I tighten everything prior to use and re-tighten after a few min of run to compensate for the thermal expansion. although nothing has ever been lose when i do this, still good to do though. 

http://i139.photobucket.com/albums/q295/JHowson/Tesla%20Coils/Experimental%20DC%20Tesla%20Coil%20%20%20code%20name%20TRON/4%20Rotary%20Spark%20Gap/GEDC1536.jpg 



Thanks, 
John "Jay" Howson IV 


"Why thank you, I will be happy to take those electrons off your hands." 

----- Original Message -----
From: "Colin Heath" <cohe@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> 
To: tesla@xxxxxxxxxx 
Sent: Friday, February 1, 2013 3:39:17 PM 
Subject: [TCML] Rotary gap electrode holders 

Hello All, 

I am building a new gap at present and looking to use 4mm tungsten. I am torn between 2 designs open to other suggestions. I am thinking of brass nuts and bolts with grub screws to fold tungsten or tungsten inside Ali sleeve/collet then grub screw through rotor onto split collet. 

I was also looking at brass rods then threaded tungsten inserts or soldered on. 

Cheers, 

Colin 

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