Re: Inexpensive HV probes

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Mddeming-at-aol-dot-com>

In a message dated 4/26/01 6:49:53 PM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes: 



>
> Original poster: "jpeakall by way of Terry Fritz <twftesla-at-uswest-dot-net>" < 
> jpeakall-at-mcn-dot-org> 
>
> I need to get a HV probe for my DMM so I can test transformers. Anybody know 
> of some good sources or a homemade version? 
>
> TIA 
>
> Jonathan Peakall 


Hi Jonathan! 
I just finished making one. I made a string of 10 10Meg 1/2W 5% resistors 
with a 100K 1/2 W on one end. input leads across the whole string, 
scope/meter across the 100K only. Very close to a 1000:1 voltage divider. 
Slid the whole thing into a piece of poly tubing with scope leads coming out 
a split on the 100K end. 
The probe was then put into a 1/2" PVC pipe with end caps and 2 side holes 
for meter leads for rigidity: 

HV    ------------------------------------------------- HV        
<======10M-10M-10M-10M-10M-10M-10M-10M-10M-10M+100K=+=====> 
     -----------------------------------------|-----|- 
                                              |     |    
                                              V     V 
                                           to meter/scope 
Hope this helps. 
Matt D.