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Author Topic: variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?  (Read 1013 times)

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variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?
« on: January 30, 2025, 11:20:11 am »
For use with any of the electric fired Jensen`s, Wilesco`s,++ :

Do any of you have experience with the cheap voltage-regulators vs. the classic variac ?
Are the small & cheap ones, like pictured together with the variac; reliable ? Does the display show the real voltage-output ?

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Ola

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Re: variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?
« Reply #1 on: January 30, 2025, 11:41:29 am »
Howdy Ola

The short answer to your questions is Yes & Yes.

I also most frequently use what is usually referred to as a "Router Speed Controller" but don't know if they are also made in a 220v version that would be useful for you.

Here is the 110v model like I have, and while it doesn't give any indication of output other than just how much you turn the knob, it has no problem with the smaller Jensens and similar engines up to about 1500 watts.

https://www.ebay.com/itm/396059187953?
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Re: variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?
« Reply #2 on: January 30, 2025, 12:36:02 pm »
Th<nk you for your shared experience, Stoker.
I have a few 110 V -models, So I would be focused on not pushing more than that via the voltage-regulator.
So experiences of these smaller regulators being accurate/ not pushing more voltage than indicated; would be good to know.

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Ola

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Re: variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?
« Reply #3 on: January 30, 2025, 03:31:22 pm »
Hi Ola, I like to use a true variac.

I have 3 and bought all for very reasonable prices.

I use them exclusively on the Jensen 50.

Like these.  0-130 volts 20 Amp

https://www.ebay.com/itm/405049450131

If your mains are 220 volts, you ought to be able to find something reasonable.

I have had success with a simple room light dimmer for control of the Jensens 600 watts or under.

Even with lower wattage requirement engines I prefer having a meter and clearly marked dial.

I did try one cheap one that was impossible to get a good handle on the output. 
It's gauge was never true and rarely off in the same direction and amount.
I  other words, all over the map. I was better off with my simple light dimmer with no meter.

Gil
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Re: variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?
« Reply #4 on: January 30, 2025, 03:40:47 pm »
Quote from: Stoker on January 30, 2025, 11:41:29 am
Howdy Ola

The short answer to your questions is Yes & Yes.

I also most frequently use what is usually referred to as a "Router Speed Controller" but don't know if they are also made in a 220v version that would be useful for you.

Here is the 110v model like I have, and while it doesn't give any indication of output other than just how much you turn the knob, it has no problem with the smaller Jensens and similar engines up to about 1500 watts.

https://www.ebay.com/itm/396059187953?
This certainly looks like a good alternative to the lighting dimmer and handles more watts than most.

Not only that I don't think it costs any more than a dimmer, receptacle and box and you don't have to assemble it.
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Re: variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?
« Reply #5 on: January 30, 2025, 06:55:43 pm »
I like a more period correct piece to match the engines and have picked up a couple used Powerstat variacs for about $30 (US made) As you can see with these few eBay examples, shipping cost can vary a lot, they are heavy!

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Nick

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Re: variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?
« Reply #6 on: January 30, 2025, 08:01:20 pm »
I built my own 'Juice Reducer' with the help from Jan many years ago with an easy wiring diagram he drew for me to follow (and I'm electronically challenged :) ).

It works for me brilliantly for all my 'kettle' boilers.

@classixs


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Re: variac vs the cheap compact voltage-regulators (see picture) ? Is the cheap one good enough ?
« Reply #7 on: February 15, 2025, 08:47:47 am »
https://www.ebay.com/itm/316266754149?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=stwcg0kgrlq&sssrc=4429486&ssuid=fAuplVW0QBu&var=&widget_ver=artemis&media=COPY

I,m technically challenged. This link should go to a kill a watt p3 meter. Although it doesnt regulate, it is very handy for monitoring voltage, watts and amperage. 120v only, although something similar may be available for 220.
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