On 10/23/2014 2:05 PM, Richard wrote:
On 10/23/2014 1:38 PM, Ed Huntress wrote:
On Thu, 23 Oct 2014 11:27:19 -0700 (PDT), wrote:

On Friday, October 17, 2014 11:16:54 AM UTC-4, wrote:
On Monday, July 29, 1996 1:00:00 AM UTC-6, Jerzy S. Krasinski wrote:
writes:

Has anyone constructed a homemade induction brazing coil powered from
a salvaged home microwave oven? I think the usual oven is rated
around
1000 watts, so it should provide enough power for a small coil,
say maybe
1-inch inside diameter. I want to join brass to 1/8-inch O-1
drill rod and make
a nice clean joint without any surplus squirting out the edges.
I've used
paste of silver/flux and also stick silver solder with a propane
torch, but
haven't developed the skills to make a perfect joint. According
to the
AWS, for a tubular type joint, the space allowed for the filler
metal should
be around 0.002 to 0.005 inches. Any comments will be welcome. Dave

Good day Dave

I have seen spot welders made from MOTs. A nice one on youtube is
from the "King of Random." It looks nice and works well. I am
planning to run two MOTs in parallel on 240 volts for higher power
and faster welding time. Please be careful when messing around with
MOTs. The high voltage side can cause nasty burns or even kill you.

Have fun and be safe.

I wouldn't say all that about welding, because remember, the act of
welding is emitting microwaves. So you are cooking yourself while
you are welding.

Welding does not emit microwaves. It emits light in the range of
infrared through ultrviolet C. It can be severely damaging to the eyes
in several ways, but the skin cancer possibility is the same as for
exposure to UV from the sun. It depends on the amount of exposure,
while eye damage can occur almost instantaneiously.

Microwaves (1x10^11) come right after far infrared (1x10^14) in the
electromagnetic spectrum. So I don't think a blanket statement that
welding does not produce microwaves would be perfectly safe.

I doubt that heart pacemakers are worried about IR.
That is 1000 times if those are the correct values of 10^11 vs 10^14.
That is a wide band difference.

Martin