The relay is described in this auction: 
https://www.ebay.com/itm/kilovac-KM-14-S40-7-5KV-10A-High-Voltage-Gas-Filled-Relay-Coil-12VDC-2740-/162989609747

/Martin

On Monday, 3 May 2021 at 23:06:08 UTC+2 nickja...@gmail.com wrote:

> Those things are useful for those of us who like to play with actual high 
> voltage.  You know, like 10kV and up!  
>
> That item is almost certainly a trigger device.  Looks like an SCR or 
> something, marked 12V on the end with small coils in the clear plastic 
> underneath is.  Those caps can start your heart, but they can also stop 
> it!  It probably has an internal resistor or one across the terminals to 
> discharge it when not in use.  The ones in microwave ovens have had them 
> for some time.
>
> On Mon, May 3, 2021 at 3:59 PM alb.001 alb.001 <alb...@sympatico.ca> 
> wrote:
>
>> I have a brand new  10 Kv 1200 pf capacitor, just took it out of it's 
>> package. Does anyone have a use for this. About 1 1/2 inch diameter and 
>> about 7 inches long.  Looks like it is a ceramic device.   one only.  Does 
>> anyone have a use for this thing ?
>> Thanks  Pharma Phil
>>
>> ---------- Original Message ---------- 
>> From: Alex <ajlg...@gmail.com> 
>> Date: May 3, 2021 at 4:04 AM 
>>
>> I suspect I can't really add anything but I have taken a few medical HV 
>> bits apart before and that kilovac looks to me like a high voltage relay / 
>> trigger tube and the transformer looks like a pulse transformer, usually 
>> for adding a spike of voltage to a pedestal / stored charge by being wired 
>> in series with a circuit. This spike usually then causes the stored charge 
>> to flow by forming an arc or triggering a tube... 
>> On Sunday, 2 May 2021 at 20:34:06 UTC+1 martin martin wrote: 
>>
>> Here's some serious HV for everyone! One of my clients gave me a '93 
>> vintage defibrillator I am taking it apart for the green CRT among other 
>> things. 
>>
>> Deep inside I found this possible choke or transformer? 
>> Also a serious 5 kV cap! 
>>
>>  
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