>> > Is the trigger transformer close to the bulb?
>>
>> http://home.clear.net.nz/pages/joecolquitt/flash_proto.jpg
>>
>> I've super-imposed the tracks. It's a fairly simple layout to follow
>
>Are you absolutely sure you haven't confused the primary and secondary
>windings on the transformer?

I haven't seen any reply to my take on it - I would still like to see a 
resistor between gate and cathode to lower the sensitivity to stray hum and 
EM stuff triggering the SCR.

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