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In article ,
says...
Andy Dingley wrote:

Neon and a capacitor (maybe 0.22uF) in parallel, fed from a bridge
rectifier. Cost a quid or so.

Why the capacitor? If the fence is pulsed, as all of ours are
(at ~ 1 Hz) then just a neon with a ~1M resistor works great.

Neon as in a mains tester screwdriver neon? Are neons different voltages?
The HT lead to the bird enclosure runs for about 40 yards, and passes
through the roof space of a shed, the fluorescent tube it passes by
"pulses" dimly, even when off. Pity it's in the shed, or that would do
VBG Thanks for replies. If the signal lamp was fairly bright could see
it from the house, which would be good.

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Best Regards,
Chris.