Re: [TCML] Slide choke question

[Sfxneon@xxxxxxx]

In a message dated 7/22/2008 7:06:31 P.M. Central Daylight Time, 
_aesops.tech@xxxxxxxxxx (mailto:aesops.tech@xxxxxxxxx)  writes:
 
<< I for one am very interested, to learn how this is  accomplished.
Thanks >>


Okay, a square metal plate with a square hole (looking something like a big  
square washer) is hinged on one side and attached at the front of the  coil 
form, so that the choke core slides in and out of the coil form, and  through 
the square hinged plate on front. A spring is attached to the square  plate 
opposite the hinge, which pulls one side of the plate towards the choke  coil. 
This allows the core to be pulled out, but puts it in a bind when it  tries to 
pull itself back in. This allows you to ramp and hold a setting when it  is 
reached. To return the choke core back to it's full in position,  the plate is 
pulled forward against the spring tension, removing the bind on the  core and 
allowing it to be pushed back in.
 
A couple of VERY important things to remember, if you do this, is to cut a  
slot in the square metal "washer" that goes from the outside edge to the inside 
 hole. If you don't do this, it will become a one turn shorted secondary 
winding  around the core, which could induce hundreds of amps into it, make it 
very hot,  and waste a lot of power. Also, if you plan to attach a metal handle 
on the  front of the core, don't make it a continuous loop. Bombarder choke 
handles are  made of wood, and attached with two brackets to the core.  
 
Some folks have also attached a linear actuator to the core so that the  
current can be controlled by UP and DOWN buttons. 
 
Tony Greer
*************

On Tue, Jul 22, 2008 at 2:54 PM, <Sfxneon@xxxxxxx>  wrote:

> Hey Bama,
> <Snip>
> Also, bombarder chokes  usually have a very simple mechanism that allows the
> choke to only be  pulled out (until it's released), which holds it in
> position
>  when you let go. Otherwise, you are fighting the pull of one very big
>  solenoid! I'll explain it if anyone is interested.
>
> Tony  Greer
> *************





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