# Project: Resistor Parts Storage

#### Wendy

Joined Mar 24, 2008
22,156
A couple of years ago I decided I was tired of buying resistors piecemeal, and started a resistor kit. This leads to the question, when you have over 150 different resistors, how do you store them? Shelfs really do take too much space, and can be hard to maintain. Lord help you if you drop one and scatter the contents to the 4 winds.

#### Wendy

Joined Mar 24, 2008
22,156
I just got through buying around 801 resistors, in groups of 20. Tanner's had 1 20MΩ resistor (DANGIT). My current spread is 10, 11, 12, 13, 15, 16, 18, 20, 22, 24, 27, 30, 33, 36, 39, 43, 47, 51, 56, 62, 68, 75, 82, and 91, or 24 per range. It starts at 1Ω and goes to 10MΩ. Looks like I'll just have to live without a full pack on the 10-99MΩ range. I'm not sure what I'll use 1.1Ω or 1.3Ω for, but I'll think of something. I wound up buying 11, 13, and 16 for every range, I hadn't originally added those to my basic range set.

I like plastic bags, other than their ESD liablilities. Cheap, easy to replace if they wear out, and extremely portable. Add a seam welder and it gets interesting.

Any ideas on relatively cheap sources for the high end megohm scale? I figure 20 of everything is enough, other than a few basics (I like large quantities of 1KΩ and 10KΩ, they are my personal default values).

Isopropal lets me reuse the bags. In the big bag their pretty safe.

#### SgtWookie

Joined Jul 17, 2007
22,210
Well, seems like my suppliers for the really large values have dried up. The fellow I bought the E24 assortment from hasn't had them since not long after I got mine - and the largest values in that assortment was 10M.

But using really high resistance values isn't typical, unless you're building HV probes or working with HV tube sets or something like that. They were easier to get about 10 years ago.

High value resistors are handy to use as forms for winding small inductors on, BTW.

#### Wendy

Joined Mar 24, 2008
22,156
This kit is 5% ¼W, so their pretty much the same size, pretty irregular cylinders. I've used ½W and 1W to make inductors, especially the nice cylindrical units. They're getting less common from what I've seen.

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#### SgtWookie

Joined Jul 17, 2007
22,210
The "nice cylindrical ones" are things of the past now, come to think of it. Good reason for that, too - all of the NOS of that kind that I have, even mil-spec 1% resistors, have shifted wildly in value over the past 20+ years. The newer type that look more like coated miniature dumbells seem to be steady as a rock.

If you have some particular values in mind, E-mail me a list of what you need. I'll check my favorite haunts next time I head that way.

#### Wendy

Joined Mar 24, 2008
22,156
OK, finished kitting up my latest aquisitions, and had to make another panel (probably the last). I wound up making the pockets 2 1/8" X 3 1/2", it helped a lot but still isn't perfect. If anyone else trys this out you might think about flaps. I drew the panels up for reference.

My $$10^{7}$$ kit looks like it will never truely by finished, the only values I have for it are 10MΩ, 15MΩ, 22MΩ, and 82MΩ. I'll keep my eyes open, but it's not a biggie. Values this large are used to tweak test selects IMO.

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#### tallht

Joined Jul 30, 2008
3

#### studiot

Joined Nov 9, 2007
4,998
Here is a storage method, courtesy a now defunct magazine Electronics Today International (Jan 1973).

Their version was all sheet metal work but mine was made from thin plywood.
The tubes were plastic pill tubes, obtainable at the local chemist for £1 per hundred. Film canisters are also good.

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#### Wendy

Joined Mar 24, 2008
22,156
Lets see, slightly over 8 ranges (X10E-1 to X10E6) X 24 resistors = 200+ values. (Yes, I actually bought them over time).

I count 75 slots in that unit, need more shelves....

#### linchiek

Joined Jul 23, 2008
110
Wow...!

Bill, u r creative man...!

#### vetterick

Joined Aug 11, 2008
35
I liked this so much I joined the forum just to tell you about it

I used the 3 ring sheet protectors (Avery #PV119XL-10), made 2 vertical seams at 3" and 6" (9" wide), marked the horizontals every 2 1/4" (sound familiar?) and cut slits 1/4" down from the lines before welding on the lines, I also welded across the top for a little more support.

This is very easy to layout if you use one of those sliding paper cutters.

It took about 1 1/2 hours to do and will take much longer to fill the 150 spaces, and its easily expandable.

Thanks very much for the idea, keep em commin.

Rick

#### thingmaker3

Joined May 16, 2005
5,084
Here is a storage method, courtesy a now defunct magazine Electronics Today International (Jan 1973).

Their version was all sheet metal work but mine was made from thin plywood.
The tubes were plastic pill tubes, obtainable at the local chemist for £1 per hundred. Film canisters are also good.