Has anyone tried the Lightkeeper Repair Tool ? My brother just got one and said it worked on 4 out of the 5 sets that he tried it on. Here is one of their questions and answers about the tool:
Does the LightKeeper repair bulb Filaments(Lighting Elements)? No. The LightKeepers Quick Fix Piezo addresses the repair of bulb "shunts" to complete circuits. The LightKeeper but does not bring a bad bulb back to life.
Bad bulbs should be replaced when noticed to prolong the life of the light set. The increased voltage due to burned out bulbs, increases the failure rate of the remaining bulbs.
I always thought that the shunt in the bulb had a higher resistance than that of the filament and that an open filament in a bulb would reduce the voltage to the other bulbs in the set. Don
[This message has been edited by resqcapt19 (edited 12-01-2003).]
#31701 - 12/02/0307:59 AMRe: Another year, and as if on cue... Happy Holidays
I always thought that the shunt in the bulb had a higher resistance than that of the filament and that an open filament in a bulb would reduce the voltage to the other bulbs in the set.
I've never seen that in any of the bulbs used on sets in Britain. When the filament burns out, the shunt just bridges the contacts directly (Sometimes! ).
It's quite noticable that the rest of the typical string of 20 lamps are brighter once two or three bulbs have shunted out, and of course the increased voltage can soon result in a chain reaction taking out more bulbs quite quickly.
Sets sold here usually come with one "fuse bulb" (identified by plain glass with just a white-painted tip) intended to open the circuit if too many regular bulbs short out. In practice it quite often takes 5 or 6 to go before the fuse bulb operates.
#31703 - 12/02/0302:32 PMRe: Another year, and as if on cue... Happy Holidays
Once you get your light sets working, try this scheme: http://home.netcom.com/~wa2ise/radios/xmassp.html Most of the sets will vary in brightness as a few sets' blinkers start blinking. Also, the bulbs will last much longer, but still be plenty bright.