[volt-nuts] Ayrton Shunt does double duty.

[geoelectronics at rallstech.net]

First class work there Mitch. 

Did I see a ham radio? 

73 DE K0FF 

George Dowell

On 2018/04/30 09:19 PM, Mitch Van Ochten wrote:

> Built a small temperature chamber using a Starbucks Refrigerator, Yokogawa Temperature controller, and PTC Heater (300 watt).  It covers 0 degrees C to 55 degrees C and has an RS-485 interface to the PC.  The compressor runs all the time, and the controller cycles the 300 watt heater as needed to stabilize the temperature. Here is a link to a YouTube video showing it:
> 
> https://youtu.be/ETj4owB3I0k
> 
> Mitch
> 
> -----Original Message-----
> From: volt-nuts [mailto:volt-nuts-bounces at febo.com] On Behalf Of geoelectronics at rallstech.net
> Sent: Monday, April 30, 2018 6:22 PM
> To: Discussion of precise voltage measurement
> Subject: Re: [volt-nuts] Ayrton Shunt does double duty.
> 
> No environmental chamber yet, have a Yokogawa controller and and an EIS
> sensor simulator, going with a small box in the first for individual
> components, but workload keeping me from completion of so many fun
> projects. Now we are nearing grass cutting season here, the completion
> of projects ratio will suffer. 
> 
> George Dowell 
> 
> On 2018/04/30 03:11 PM, jasonpepas at gmail.com wrote:
> 
> Much appreciated!  I saw some of those units listed on eBay inexpensively and was curious about such a "mod". Have you characterized it for tempco?
> 
> Sent from my iPhone
> 
> On Apr 30, 2018, at 2:02 PM, geoelectronics at rallstech.net wrote:
> 
> Leeds and Northrup Ayrton Shunt box Model 2664. 
> 
> Modified to do double duty as a precision resistor standard. 
> 
> Pictures here: 
> 
> http://www.qsl.net/k/k0ff/VOLT_NUTS/Ayrton_Shunt_Conversion/ 
> 
> Later I'll write it up and post it to that link as a PDF with text and
> pictures, plus any subsequent modifications. 
> 
> George Dowell
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