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Forced Revision DMMCheck Plus
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rkeller:
Hi Everyone: I hope you all had a nice Christmas season and best wishes for a joy-filled and prosperous new year. 
I wanted to share a product update and also ask for feedback before we make our latest offering available.
Finding parts, as everyone knows, has gotten a little dicey at times.  Many of the thru-hole components we use on our DMMCheck Plus have risen in price by hundreds of percent or are not as readily available.  Even though, for example, we are only talking about resistors that used to be 0.23 cents U.S. going to $1.25, in masse, it still impacts pricing and the "do we continue doing this" equation.  Instead of getting discouraged or throwing in the towel, Doug and I have been working on an improved reference with more readily available surface mount components.  The benefit is, we can keep the price down and also go with higher tolerance parts.  Since we were redesigning, we implemented the often suggested (and thank you for all the great constructive feedback) idea of having an external power supply to keep the reference always on, and always ready without the 15-minute warm-up period.  As many of the metrology geeks (me a metrology geek wanna-be) already know, the longer you run a reference LT2021, the higher its stability.  With the forced redesign, you can keep it running and improving 24/7 or until your solar panels crack and your inverter fries... I digress.  We were able to add everything on board, and now instead of seven functions, there are 9 or 10 if you count the second reference frequency. DC volts, AC volts, DC current, AC current, Frequency 1, Freq. 1 duty cycle, Frequency 2, Freq. 2 duty cycle, Resistance, Inductance and Capacitance.
We are not making it active on the website till Jan 1, 2024.  It's visible as of five minutes ago, but the inventory is set to zero for now.  If you are interested in commenting please do so, I welcome your constructions.
You can see the offering here:
https://dmmcheckplus.com/
Attached is one of the beta units in pre-production.  The finished product and specs can be seen on the website.
BILLPOD:
Thanks Rkeller.   I've been contemplating on getting one of these for quite a while, and looks like it's good that I did, as this new model has extra functions.  I'll be sending in my order in a week or two. :clap:
CatalinaWOW:
I have sure enjoyed mine and am glad you are carrying on.  Don't know if I will buy another, but would happily recommend to anyone needing anything resembling this.
bicycleguy:
Don't understand the logic of a 15Vdc power supply, especially with what looks like a 12Vdc connector.

I am really looking forward to all my low voltage stuff being USB-C and getting rid of all these weird non-standard connectors, cables and supplies.  Many USB-C power supplies will do 15V @ 2A, way more than you need and probably way more efficient and possibly cheaper.
J-R:
FYI, direct link to product being discussed: https://dmmcheckplus.com/shop/ols/products/dmm-check-plus-fully-loaded-with-all-options-lc-board-enclosure-and-dual-frequency

Glad to see continued production and improvements.  It makes sense that SMT is far cheaper than through-hole, due to automation and the reduction of materials.

With regard to the new design, of course it's great that the components are underneath and protected and the connections are easier to reach.
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