On 13/04/2012 09:43, Andrew Gabriel wrote:
In ,
Martin writes:

Sorry to mislead that was from memory. The dead units are sat in the
garage. It is on checking it is a single choke driving two 18" 15W tubes
in series each with their own starter. The choke is marked Yongxin Dy-30
220-240 50Hz 2x15W 18" tubes and they are absolute crap.

Two flykillers failed about a month after their warrantee ran out in
exactly the same way - the choke is now open circuit. The HT zapper
still works fine but the flies don't visit without the blue light lure.

Twin tube 18W/24" single ballast is one of the most commonly used
commercially, and starters used in these will be easily available
from any electrical wholesaler, or a good retail lighting store.
These are normally rated for 4-22W, but using starters as you go
lower down that power range becomes more wearing on the tubes,
and you will get short tube life, particularly if switched on/off
frequently. You might want to consider completely removing the
starters and ballast and replace with electronic control gear
suitable for those tubes.

I am unsure how the full electronic ballasts would work with a pair of
tubes in series like this - fluoro lighting gear really isn't my thing.
I just identify the dead part and try to replace like with like.

It is intrinsic that they will be switched on and off once per day.

Meanwhile, you could replace the tubes with a piece of raw chicken,
and you'll probably find the zapper is 10 times more effective than
it used to be...

I don't think the village hall committee would like that solution.
I confess I am half tempted to try a pair of 3W blue LEDs instead.

--
Regards,
Martin Brown