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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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2nd Apr 2019, 8:20 pm | #21 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,194
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Re: 10k resistors: Is it just me?
Hi Folks, it can be a production engineering purchasing thing where the huge volumes bought reduce the price significantly.
A a major SMPS far east manufacturer the preferred type was a 10K 1% for all positions. This also speeded up auto insertion as only 1 station was used for all 10K values. Ed |
2nd Apr 2019, 8:26 pm | #22 |
Hexode
Join Date: May 2015
Location: Northampton, Northants, UK.
Posts: 380
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Re: 10k resistors: Is it just me?
I have sometimes made a conscious effort to use something other than 1k, 10k, and 100k for this reason. Nevertheless they are my largest "stock" by a couple of orders of magnitude!
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2nd Apr 2019, 9:26 pm | #23 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,713
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Re: 10k resistors: Is it just me?
I think it was a lecturer at college that remarked to us half jokingly, "When in doubt use a 2.2k". I still think of triple-red as the "universal " component.
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2nd Apr 2019, 9:42 pm | #24 | |
Octode
Join Date: Oct 2003
Location: Newbury, Berkshire, UK.
Posts: 1,770
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Re: 10k resistors: Is it just me?
Quote:
Reminds me of some boards I had to test when I first started work. It was a signal conditioning card and consisted of 3 op amps surrounded by a sea of solder turrets. From a set of tables we had to calculate the values of resistors and caps to to give the right gain and frequency response - then fit them. I wondered at the time how much more the design engineer of that board was being paid than I was - I suppose he had to select the type of op-amp (OP27 ISTR)
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2nd Apr 2019, 10:24 pm | #25 |
Nonode
Join Date: Dec 2012
Location: Stockport, Greater Manchester, UK.
Posts: 2,105
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Re: 10k resistors: Is it just me?
I remember a distributor's rep. telling me a few decades ago that 10k was the most-specified (and therefore ordered) value
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3rd Apr 2019, 10:15 am | #26 | |
Dekatron
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,081
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Re: 10k resistors: Is it just me?
Quote:
From a design point of view, good practice would be to finish with 18 different values, so that if a design modification is needed requiring a new, unused value, there's still capacity in the production process. As it happens, I've never had to deal with this in the 'day job' though I still aim to common-up on values, where possible, in a circuit. It makes the parts list shorter. Just so happens that 10kΩ is not one of my go-to values! |
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3rd Apr 2019, 11:44 am | #27 |
Banned
Join Date: Feb 2019
Location: Congleton, Cheshire, UK.
Posts: 609
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Re: 10k resistors: Is it just me?
Not resistors, but I've noticed a tendency towards using up 47uF electrolytic caps from my supply faster than any others.
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