[Amps] HV resistor source

[donroden at hiwaay.net]

Quoting Jim Garland <4cx250b at miamioh.edu>:

> That's going to be quite a resistor, inasmuch as 4KV across a 30 ohm
> resistor amounts to a half million watts of dissipation!  A 4KV pulse 50uS
> wide, once per second, would dissipate 25W.
> 73,
> Jim W8ZR


The resistor isn't to ground..... it's in series with the tube(s) that  
may draw 1 amp intermittently ... therefore 1 amp squared through 30  
ohms is 30 watts.

If the tube draws more amps ... a short or a bad load... maybe a two  
amp spike... that is 120 watts which will hopefully burn out the  
resistor
( acting like a fuse ) before the transformer or diode stack goes up in smoke.

Don W4DNR