500ma78/79 blow up!

[Ken MacBeth]

Hi, anyone got any why reason the heater elements in
3046 prodigy expo gens blow when basic 1 amp 78/
7912's are used as opposed to circuit specified 78m/
79m12's (500ma)are used, I've tried many times to
solve this problem, and when I ask, I am normally told
that the circuits should only drag the current they
need...
if any one out there is interested, check out my home
built analogue site at
http://www.macbethstudiosystems.freeserve.co.uk

 
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