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 Post subject: What is This Called?
PostPosted: Jan Tue 30, 2018 3:25 pm 
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Joined: Feb Fri 03, 2017 5:28 am
Posts: 110
Location: Mikwaukee, WI 53207
Is the a name for this type of selector?
This one has (10) resistors at 1K each.
decade switch?

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 Post subject: Re: What is This Called?
PostPosted: Jan Tue 30, 2018 4:07 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Maryland 20709, USA
It is a rotary switch.

The 10 precision resistors suggest it's a voltage setting switch or a resistance standard switch.
That would depend on how it's wired and used in the circuit.

- Leigh

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 Post subject: Re: What is This Called?
PostPosted: Jan Tue 30, 2018 4:08 pm 
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Joined: Jun Fri 19, 2009 6:34 pm
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Location: Long Island
Things like that have various names depending on how they are used. Decade resistor probably, could also be an attenuator or a range selector. A lot would depend on how the rotating contact is arranged. If it breaks contact with one resistor before it makes contact with the next, it is probably audio or level related. A switch that makes contact with the next resistor before it breaks from the previous one would be more likely to be used in test equipment. But there are no hard and fast rules for this.

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 Post subject: Re: What is This Called?
PostPosted: Jan Tue 30, 2018 5:17 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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I've also called them wafer switches, because of the 'wafer' construction of the rotating mechanism.


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 Post subject: Re: What is This Called?
PostPosted: Feb Fri 02, 2018 8:02 am 
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Joined: Sep Thu 23, 2010 6:37 am
Posts: 10344
Location: Powell River BC Canada
A decade switch has 10 possibilities Zero to 9 . It uses 9 resistors.

However, some commercial decades have a special contact arrangement and only
4 resistors.

The resistor values are 1, 1, 4, and 3. or 1, 2, 6, and 3.

So, consider that any value resistor, from 1 ohm to 999 ohm can be made
from only 12 resistors !

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 Post subject: Re: What is This Called?
PostPosted: Feb Tue 06, 2018 3:45 pm 
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Joined: Feb Fri 03, 2017 5:28 am
Posts: 110
Location: Mikwaukee, WI 53207
Thanks for all the info!

Joe Y

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