[Amps] Decline of homebrewing?

[Roger (K8RI)]

I mentioned my first project was a pair of 6L6s, that probably had 
between 500 and 600 volts on the plates.  By the time I was building the 
6C21 into a pair of 813s, I was working on RF generators, some of which 
developed over 200 KW.  As I was in maintenance they just assumed I knew 
what I was doing.  Back then all the training and safety procedures 
weren't required.

I would have been as safe building QRO at 15  as I was at 50.
On the farm, I was operating machinery that could snuff you out in a 
really messy fashion. Equipment that you wouldn't dare let a youngster 
operate nowdays or the law would pay you a visit. That was normal for 
farm kids in those days.

So I had learned a healthy respect for anything that hurt including Weed 
Chopper electric fences. I knew what HV could do, before ever getting 
near it.

73,  Roger (K8RI)


On 1/7/2017 11:14 AM, Ward Silver wrote:
> > Excellent advice, Jim.
>
> Hear, hear!
>
> And another good piece of advice is to make sure you have an ac safety 
> ground connection on every metal enclosure.  With 12 Vdc being the 
> normal power supply voltage these days, we can get away with practices 
> that would really be hazardous for tube-based gear.
>
> >  A 50 uF capacitor charged to 4000 V holds a potentially deadly 400 
> Joules of energy
>
> In the defibrillator business of a few years ago, this was known as 
> the "rescue shock" of last resort.  This amount of energy can lift a 
> 200-pound person 1.5 feet.  When leveraged by muscle-and-bone, much 
> damage can be done.
>
> 73, Ward N0AX
>
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