22-01-2012, 05:07 PM
I'm always very suspicious of 'co-incidences': perhaps it's the engineer-cum-mathematician in me. I suppose that it is just about a conceivable possibility that when you kicked that switch, and although the power to the AR88 was off, the filament might have just about been fragile enough (considering its age) to have been broken by sheer mechanical impact / vibration force. Having said all that, since an AR88 is one helluva heavy radio, that glib theory only holds water if you gave it one enormous thwack! Were you wearing steel-capped shoes at the time? 
OTOH, when you last switched the AR88 off, I wonder if you moved it to its 'home' under the desk whilst the filament was still warm - albeit only a bit - and the final 'plonk' on the floor did the damage?
I joined the wrong profession: post-mortems always fascinate me!
Al.
OTOH, when you last switched the AR88 off, I wonder if you moved it to its 'home' under the desk whilst the filament was still warm - albeit only a bit - and the final 'plonk' on the floor did the damage?
I joined the wrong profession: post-mortems always fascinate me!
Al.
