Lighted address sign nonfunctioning resistors

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Old 12-14-20, 03:00 PM
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Lighted address sign nonfunctioning resistors

Trying to get my lighted address sign up and running. I took it apart to clean the contacts. Power is coming from a door bell transformer at 18.5vac. When connected one wire is connected at the end of resistors with a wire nut and the other is connected to second from the right screw. I tested continuity on the resistors and do not get a tone. Also tested light bulbs and contacts between all wires. I just installed 2 new light bulbs rated for 6v. Not sure what the existing ones are. I know they also can be rated for 14v (Eiko 1487). It's hard to tell what kind of resistors they are since color is distorted. Orange or red/Black/Brown/Silver? I'd like to know which resistors they are or an alternative way to get these lights powered again.

 

Last edited by Rick P; 12-14-20 at 03:47 PM.
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Old 12-14-20, 04:08 PM
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This would be a good opportunity to convert the sign to LED. If you are interested, post what the sign looks like and we can make some suggestions.
 
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Old 12-14-20, 04:35 PM
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I agree on LED's.

If you were set on staying with what you have..... we'd need to know if those bulbs are in series or parallel.
If they are in series..... tip to tip...... use the 14v bulbs. Two in series would be 28v.
They should provide enough light and not need resistors on that size transformer.

If you have all 6v bulbs..... and they are in series.... put both socket sets in series. That will
yield 24v. On an 18v transformer should be about right.
 
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Old 12-14-20, 05:09 PM
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Basic hooded lighted address sign

LED's sound great. I hope it's an easy conversion.
 
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Old 12-14-20, 05:29 PM
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Lots of choices. Most will be based on 12vDC. You can replace your transformer with a small wall wart.
Most choices come on a roll with more than you need but can be cut shorter.

1' cool white strip
White neon like LED tubing
 
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Old 12-14-20, 05:41 PM
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Pic of back of light bulb set

I would need to keep the door bell transformer since it powers my video door bell as well. Not sure how this light bulb set works. This picture shows a brass plate that connects both light bulbs together in between. Series or parallel?
 
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Old 12-14-20, 05:46 PM
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That looks like the screw terminals connect to the shells and the bottom of the bulbs connect together. That would be series.
 
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Old 12-14-20, 06:03 PM
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How would 6v bulbs be wired for both socket sets in series. That will yield 24v? I like the use of 14v bulbs as well. Two in series would be 28v. I may try both since I wouldn't need the use of resistors. Thanks for your help!
 
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Old 12-14-20, 06:39 PM
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Has the sign lighting ever operated? The resistance was selected to provide an ac voltage of less than 18.5. How do you know the bulbs can be rated for 14v? Why did you buy 6v bulbs? Do you know if the fixture with the 2 bulbs has them connected in series or parallel?
 
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Old 12-14-20, 06:49 PM
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I haven't been in the house long enough to see if it had ever worked. I just replaced the bell transformer to get my video door bell to work. The lighted address sign is wired on same circuit. The only bulbs I could find of this size I found at my local Lowe's is 6v. After some research I found they also are made for 14v and others have used for this application. The bulbs are connected in a series since the screw terminals connect to the shells and the bottom of the bulbs connect together as shown above.
 
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Old 12-14-20, 07:09 PM
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What is the VA rating of the transformer? What is the wattage of the lamps and the doorbell. You may overload the transformer.

You will likely be better off using the 6 volt. As PJ posted put the lamps all in series so they share the voltage. You could likely bump the voltage up to 24 volts if your doorbell can handle it.

If you want to try LED lamps just google E10 base LED
 
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Old 12-14-20, 07:27 PM
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The transformer is a tri-volt 8vac/10VA, 16vac/10VA or 24vac/20VA. I currently have it hooked up on 16vac/10VA since my mechanical doorbell is rated 16v. But, I have it bypassed with a jumper wire since I'm using a separate electronic chime. The door bell can handle up to 24v. The 6v lamps are rated at 1.8w each. I may bump up the voltage to 24v. The question I have: How do I wire the lamps all in series so they share the voltage or How would 6v bulbs be wired for both socket sets in series. That will yield 24v?
 
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Old 12-14-20, 07:52 PM
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Series wiring...........................
 
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Old 12-14-20, 08:15 PM
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Awesome... Thx! I just hooked it up as you illustrated running at 18v. Seems fairly bright. I may switch transformer to 24v to see how much brighter it is or leave it at 18v for longer bulb life. Could I still install E10 base LED bulbs using the 18v?
 

Last edited by Rick P; 12-14-20 at 09:57 PM.
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Old 12-15-20, 05:07 PM
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You will have to do some looking around. I found many LED bulbs that run on varying but typically the higher voltages were 12v or 24v. Nothing in between. Example: https://www.amazon.com/GutReise-10pc...s%2C290&sr=8-3
 
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Old 12-16-20, 05:07 AM
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The sign doesn't light when any bulb fails when the bulbs are connected in series. I would connect them in parallel for that reason.
 
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Old 12-16-20, 08:15 PM
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I'd have to do some serious modification to the bulb housing. Unless u can illustrate how to do it. I may just keep it like this for a while and change to something else entirely later on. It's working to my liking now running 18v in a series like Pjmax illustrated.
 

Last edited by Rick P; 12-16-20 at 10:37 PM.
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Old 12-16-20, 08:19 PM
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The sign doesn't light when any bulb fails when the bulbs are connected in series. I would connect them in parallel for that reason.
That would be fine but you would have to match the voltage of the transformer to the lamp. There are not many 18 volt lamps out there. The next option would be 24-volt lamps on a 24-volt system.
 
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Old 12-18-20, 06:26 AM
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While the lamp holder wires its 2 lamps in series you can connect the 2 lamp holders in parallel by connecting the circuit hot and neutral to each lamp holder. Each lamp would be rated for half the circuit voltage.
 
 

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