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Yongxin 2x6W T5 magnetic ballast (Left), and 3W HV transformer for the zapping net (Right)

Yongxin 2x6W T5 magnetic ballast (Left), and 3W HV transformer for the zapping net (Right)

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I don't know if the ballast can also operate two 4W or 8W T5s in series.
There is an earth cable that connected to the cover of the bug zapper, to prevent electric shock from it.

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Album name:dor123 / Lighting fixtures
Keywords:Lanterns
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Date added:Mar 22, 2013
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Mar 22, 2013 at 11:41 AM Author:
As for your earlier question will it run 2X4w T5 tubes...the answer: You will need a 7w-11w PL-S ballast to run 2x4w T5 tubes nicely since that can run a 8w T5 perfectly. And I think the earthing may not protect from the H.V since the current is 7mA and to trip a ELCB it has to be more than 30mA.
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Mar 22, 2013 at 12:04 PM Author: Ash
The difference is not that big, i think it'll run 2x4w acceptably well (lightly overdriving them but i think it won't be enouhg to shorten their life)

Notice that its rated just tw95. Assume its surroundings will be 40C in summer, it's just on the border of overheating. It'd be interesting to see how hot it really gets after working for a full night with the cover of the fixture closed



The outputs of the zapping transformer are floating - It means that direct high voltage is present only between the 2 parts of the zapping element. Which means :

- Shorting its output to the enclosure, even if the current would be >30mA, cannot trip the RCD. Which is good - you dont want the RCD tripping as result of a big mosqito etc getting in and shorting the zapping element to the external guard

- It is safer this way. since the HV supply is isolated from the mains input, a leakage path from the HV to the enclosure (from dirt accumulation or moisture etc) won't cause HV to appear on the enclosure, even if the earth fromthe socket is broken (due to bad wiring in the socket, using Shcuko plug in Israeli socket, or any other reason)
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Brian TheTellyman
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Mar 22, 2013 at 12:22 PM Author: BG101
Our 8W T5 ballasts are also suitable for 2x4W that looks like a 13W ballast to me, these also run 2x6W. However the most recent one I have (in an MLP13) states 2x8W and not 2x6W. I would have thought 2x8W would be underdriven? I'd expect 2x4W to be overdriven on a 13W ballast.


BG

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Mar 22, 2013 at 12:25 PM Author: Ash
I think so but you can try

My experoience on this goes to : A friend of mine had a 2x9w PL fixture in his place, that was "haunted" no matter what brand lamps he put in, they would be EOL within a couple of months so he give up on the fixture. I opened it and found tha the 2 PLs are connected in series on a 1x7-9-11 PL ballast, so they must be underdriven quite a bit. I removed 1 of the lamps and rewired it to be 1 lamp, it works for more than a year since
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Mar 22, 2013 at 12:29 PM Author: BG101
I'll have to experiment with these setups now I have a clamp meter! I have plenty of tubes and both 8W & 13W ballasts of various brands.


BG

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Mar 22, 2013 at 12:31 PM Author: Ash
Go for it
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Mar 22, 2013 at 03:35 PM Author: Kappa7
I have two very similar bug zappers but in the 2x8W and 2x18W version(here and here). When I've bought the 2x8W version there was also the 2x6W and 2x10W(with T8 tubes), but I've preferred to take the 8W one because it's easier to find replacement tubes in this wattage.
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Mar 22, 2013 at 04:13 PM Author: Medved
The Both 4W , as well as 8W tubes would be underdriven on this (they are 160mA, while 6W tubes are 130mA), so they would be more "blink happy", but it should still run.

No more selfballasted c***

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Jun 15, 2015 at 12:05 AM Author: Solanaceae
It's cool to see a transformer like that! Over here the bug zappers are cheapie ones with a transistor and HF circuit that converts 12vdc to about 2000v. Those will barely last the summer since the summer wreaks havoc on them between the bugs shorting it out and the humidity.

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Jun 15, 2015 at 01:27 AM Author: dor123
The transformer is for the zapping net only. The two lamps operated in series with a series choke

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

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Jun 15, 2015 at 08:14 AM Author: Solanaceae
Yes I realized that. Over here our zappers are electronic crap like I said. How Long will this zapper last?

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Jun 15, 2015 at 09:30 AM Author: dor123
I uses Arlen EFS120 Pulsestarters in this 2xF8T5 bug zappers, that FrontSideBus sent me, which prolongs both lamps and ballast life. I think that the bug-zapper will last several years as a result. I've understood that in the US, they uses electronic step up transformers or voltage doublers for the zapping nets, and HF or capacitive ballasts for the lamps.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

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Jun 15, 2015 at 09:45 AM Author: Solanaceae
Yeah the lamps on some of them here are usually tapped from an auxiliary winding on the HV transformer, or the good quality ones will have a choke mounted to the circuit board with either an electronic starter or a soldered in glowbottle. I've also seen some with the capacitor ballast like you said and they would be glow start.

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Jun 15, 2015 at 09:56 AM Author: dor123
The ones with the capacitive ballast and voltage doublers, are the cylindrical ones. The ones with the square shape and two lamps, are usually inductive (Both transformer and preheat ballast).

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

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Jun 16, 2015 at 02:22 AM Author: Kappa7
Just this night one tube in my 2x8W bug zapper has gone eol! In these 4 years it has done about 5000-6000hours of nightly use, so not too bad for chinese tubes. By the way I've changed the ballast after about one year with a more efficient and silent one made by knobel( a swiss company that has been bought by tridonic).
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