>
> On Jul 17, 2009, at 9:34 AM, Alan B. Pearce wrote:
>
>>>> 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.

that will prevent false triggering.... it will not fix triggering not  
happening.
Gus
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