Deaddog Saloon

[mitdr774]

it would be pretty neat to be your apprentice. wouldn't exactly hurt my workplace morale.

I have a reputation with apprentices that isnt the greatest.

I tend to hold apprentices to the same standards I held myself to as an apprentice. If I know an apprentice is capable of doing the job well, but does it half assed they will hear it. I try to help and teach what I can, but if I know that you know what you are doing and play dumb I can be a bit of an ass. I try not to be, but it seems to happen.

I am quite lenient with a new apprentice though.

 

[Eric Smit]

I have a reputation with apprentices that isnt the greatest.

I tend to hold apprentices to the same standards I held myself to as an apprentice. If I know an apprentice is capable of doing the job well, but does it half assed they will hear it. I try to help and teach what I can, but if I know that you know what you are doing and play dumb I can be a bit of an ass. I try not to be, but it seems to happen.

I am quite lenient with a new apprentice though.

that's what I'd expect from a mentor.

I'm hearing that Phoenix is getting flooded quite good and more rain is coming.

Anyone from the area with details? Any Sonic damages?

phoenix was basically underwater.

 

[ReeseLightning]

That'd be scary knowing what could of happened with that 277v so the obscenities would be most valid in that situation. Electricity certainly is fascinating, I mean it's essentially the most critical component of life all the way down to the way molecules interact with eachother.

 

[$ub$onic]

a recent vinyl project.

What a pita those little things were to make.

Also grey overlays

 

[$ub$onic]

And my Hondas. I am starting a small fleet

 

[Eric Smit]

stupid hondas.

 

[$ub$onic]

stupid hondas.

Both combined consume less oil then your Buick

 

[Eric Smit]

Both combined consume less oil then your Buick

both combined are only 50% of my Buick. hahaha. and it doesn't consume oil, it has a convenient oil disposal mechanism at the seals and seams.

those were options.

 

[$ub$onic]

both combined are only 50% of my Buick. hahaha. and it doesn't consume oil, it has a convenient oil disposal mechanism at the seals and seams.

those were options.

Ya so does the wagon I need to drop the pan and re seal it. The silver one has no leaks period. It's incredible. Wagon has 215k ish and sedan just tuned 177k.

 

[Eric Smit]

it seeps oil from every possible orifice. no real leaks, just some surface oil. it's a convenient lubrication system, that's for sure.

 

[$ub$onic]

Redneck undercoating.

 

[Eric Smit]

my chassis won't rust, that's for sure.

 

[ChrisJ]

What kind of energy are we talking in those arcs, like lightning or more?

Not even close.

First, think about how far of a gap lightning can jump under the right conditions and then think about the current it can do it with. I've heard people claim lightning is often a million volts @ a million amps. I've seen a few tesla coils that produced over a million volts but it was with close to no current.

We had a tv that got hit by lightning and it evaporated all of the copper off of the PCB and the copper ended up essentially plating the plastic bottom of the cabinet.

500KV like that switch shown which if I recall, that arc was caused by a switch down the line not opening as those air switches are for saftey only, they shouldn't be interrupting current. I believe that arc was caused by the huge inductor on the other side of the switch which is used to counteract the capacitance caused by the extremely long run of wire across the earth's surface. Inductors don't like it when you try to cut power to them. I believe they cut power down the line with some kind of special switch and then open those huge air switches just as a safety to work on or replace the inductors.

Again, thats from memory, mitd would know more I'm sure.

 

[mitdr774]

I honestly dont know a whole lot about medium and high voltage switching. Believe it or not 480 is considered low voltage. That would fall under work performed by the line men. We really dont even get to do much with 13.2 primary. I would like to spend some time working with the linemen (local 17 by me) just to have an understanding of their work.

480v arc flash has enough incident energy to cook flesh. If you complete the circuit and the OCPD does not open quick enough it is possible to burn up flesh and bone.

It is also possible to get a 4th degree burn from electricity. Basically you cook the muscle under the skin without much visible damage to the skin itself.

 

[ChrisJ]

I honestly dont know a whole lot about medium and high voltage switching. Believe it or not 480 is considered low voltage. That would fall under work performed by the line men. We really dont even get to do much with 13.2 primary. I would like to spend some time working with the linemen (local 17 by me) just to have an understanding of their work.

480v arc flash has enough incident energy to cook flesh. If you complete the circuit and the OCPD does not open quick enough it is possible to burn up flesh and bone.

It is also possible to get a 4th degree burn from electricity. Basically you cook the muscle under the skin without much visible damage to the skin itself.

When I was in highschool I did something really dumb when working on a vacuum tube amplifier.

I was holding the chassis in my left hand and wanted to move a plate resistor a little as I thought it was picking up noise. As you may know, older stuff up until the late 60s or so didn't use circuit boards, it was all point to point, or components basically hanging in the air.

Anyway, my left hand holding the chassis *ground* and my right pointer finger instead of only touching the resistor material, also touched the B+ side of the resistor which was 400VDC.

My arms locked, I actually started to panic because it really hurt, and I couldn't move. Luckily I realized I was in sneakers (concrete floor in the basement) and walked backwards pulling the amplifier out of my hands. It seemed like hours but I'd bet it all happened in 5 seconds or so.

It fell on the floor, broke a pot, but I lived.

I've had many shocks, but never has one felt quite like that and I'm probably lucky it didn't do me in especially going through my chest.

A dc shock like that doesn't feel like an ac shock. It doesn't really vibrate like ac, it's hard to explain.

From that point on I've been careful with the 1 hand rule.


Some of my past amplifiers that I sold years ago, including one showing point to point (no circuit board)

https://fbcdn-sphotos-h-a.akamaihd...._=1418538682_e051db1845efed1a41080cdd597bf4f6

https://fbcdn-sphotos-b-a.akamaihd...._=1418336264_94d5ad41b308c08f41b8ae224e0e7f24

https://fbcdn-sphotos-h-a.akamaihd...._=1419985653_ec217be76605b803098effae96fb7feb

 

[ReeseLightning]

Quick thinking like that will save your life, glad you lived to tell about it cause that is a kick ass story. I don't know much about amplifiers, I do appriciate handmade pieces of art and that's what I see when I look at that circuitry, good stuff ChrisJ.

 

[mitdr774]

DC bothers me more than AC. At least with AC you have a chance of being thrown away. DC just locks the muscles in one position.

At USSteel they use a lot of 700 VDC equipment. The equipment is fed from bare silver plated buss that is about 1.5"x14". It is not protected and easy to contact. Thankfully I have only ever had the joy of experiencing 24 VDC as far as DC is concerned.

 

[Eric Smit]

am I the only one that stuck his tongue to a 9V battery as a kid?

 

[ReeseLightning]

Wasn't a kid I was more like 16 and didn't think it'd actually shock me

 

[mitdr774]

I dont count a 9v on the tongue as getting to experience the power of electricity.