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Engine basics => Engine set up tips => Topic started by: dave siegler on April 26, 2009, 08:30:33 AM

Title: Fox plugs Racing
Post by: dave siegler on April 26, 2009, 08:30:33 AM
I just got a card (12) of fox long RC plugs from a hobby shop that is going out of business.  They had an old price on it and were 30% off. (about $1.25 ea)

The thing I did not notice is the little sticker on it that said you need an extra resistor to limit the current to 6A.  It states the R is .15ohm . A 1.5 batt will pull 10A.! Is this a standard fox screwup? 

I think my globee will work because us goes down to .2ohms, but do power panels work on a current limit of voltage limit? 
Title: Re: Fox plugs Racing
Post by: Paul Smith on April 26, 2009, 08:47:11 AM
I wouldn't worry about using a Fox plug with a 1.5 volt battery, or espically one of the little NiCad headlocks that are only 1.2.

I use Fox plugs with a power panel and they last a long time.  I have an old panel with no rheostat but some sort of internal limiter that glows the plug without burning it down. 

If yours has a dial, just hook up a plug and dial it up 'til the color looks good.  Leave the EE stuff to professionals.
Title: Re: Fox plugs Racing
Post by: Brian Hampton on April 26, 2009, 11:56:13 PM
Power panels work by pulsing the 12V on and off which is why you can hear them buzzing. I never go by the green and red scale because different brands of plugs can have a huge difference in the correct setting for a decent glow. With a new plug I always turn the knob right down before connecting it then slowly wind it up until I have the glow I want and then check the setting on the scale. OS plugs always seem to need to be way up in the red while others just barely get into the green.
Title: Re: Fox plugs Racing
Post by: dave siegler on April 27, 2009, 05:10:43 AM
I have used fox plugs for a long time but I have never seen toies that had a little sticker on each one that said warining you must use an external resistor. 
Title: Re: Fox plugs Racing
Post by: Herman Green on April 27, 2009, 05:03:24 PM

I remember seeing a Caution from Fox, either in an ad or on a plug card, saying if you used a 2 volt wet cell you needed an external resistor to drop the voltage if you were using the 1.5 volt plugs.  Fox was at that time making 2 volt and 1.5 volt plugs.  Do they still make 2 volt plugs?

Herman