The EEVblog Bunker

[mikeselectricstuff]

and after a year you might want to give another coat.

...By which time there will be so much stuff on the floor that even the thought of clearing it to re-coat means it won't happen

[SeanB]

Then you just do the visible parts, as the covered side will still be fine.

[TerraHertz]

A good fix for echo, is to find some old carpet (free) and hang it on the walls. Before you put shelves up.

[David_AVD]

Painting the block walls will increase the echo.

[Monkeh]

Painting the block walls will increase the echo.

But decrease the dust.

[Whales]

No ventilation is going to be a pain in the long term.  Even if you don't have moisture problems, it won't smell nice or be fresh.  You can imagine the look on Sagan's face when he's told he has to visit daddy in the fart chamber again.

Can you poke a hole through the besa blocks to the outside world and install a low-speed mains fan?  If the owners don't like it, tell them it's for ducting your air con, but you've found a way to do it without having to bother them with the outside unit 

Have you tried finding out who operates the system for the ducts on your ceiling?  Who knows, they might not mind if you ask about 9mm'ing some holes in it.

[SeanB]

Look for old curtains and hang on the wall so you can just close them over the wall when needed for recording. Cheap and you only have to look at them when recording, otherwise they are out of the way. Lined ones you just hang with the lining facing inwards and look at unbleached linen.

[pickle9000]

Things to do with old doors,

- Bench tops (handle holes at the back for cable feed through).
- Slide for Sagan. Also good for car toy races.
- Corner box for packing materials.
- Just sit them on the floor to stack stuff on, keeps stuff off the cement. Bubble wrap helps between cement and door.
- Make a couple EEVblog signs and just keep moving them from place to place.
- Train set table.
- Get a couple saw horses and make a tear down bench for the really nasty stuff, flip over when destroyed.

[Monkeh]

The stuff running down the walls is just slurry from the roof slab. Worked its way past the shuttering. Pretty normal, usually it's hidden above drop ceilings.

[SeanB]

That though is pretty neat brickwork, all lines even, all blocks fully seated and all joints are levelled off. Takes skill to do that, especially on an unplastered wall. Paining though will be an issue, you need a rough surface roller, and at least 3 coats to get a coat that will not show all than the worst imperfections, or learn how to bag wash the wall to get a plaster layer over them to make a smoother surface.

Here though those walls would be put in after shuttering and casting the floor slab above, not as part of the support structure during casting, along with it being a load bearing structure.

[EEVblog]

No ventilation is going to be a pain in the long term.

I was wrong, it has excellent ventilation. That ducting comes directly form the outside and is dedicated to my unit and unit next door. The fan turns on automatically when I switch the lights on, and pumps fresh air from outside into the lab, not out as I had assumed.
In theory, fresher air than my lab.

[EEVblog]

Probably worth sealing the floor to reduce dust before you fill it with crap.

Yes, I plan on doing that.

[nowlan]

fan drawing air would play havoc for temperature, summer/winter.

[EEVblog]

fan drawing air would play havoc for temperature, summer/winter.

I'd rather have the fresh air thanks.
But in any case, no it shouldn't. 30m or so of internal ducting will take care of most air temp differential by the time it gets there. And then the volume is so low that it won't make any huge difference. I've done these sorts of measurements on my solar air heater design.