Of course there's nothing wrong with progress, if this wasn't the case we'd all still be living in caves instead of houses, and heating our caves with open fires instead of the central heating boilers we use today.
Talking of central heating boilers, I have an old Potterton Profile in my house that must date back to the mid 1990's and after 25 years of reliable service the control board gave out, so I fitted a reconditioned board for £70 that apparently incorporated some improved components to ensure this time it would last even longer than 25 years, which to my mind was pretty impressive anyway!
The components that fail on a Potterton Profile control board are clearly well understood as the engineer who sold me the reconditioned board upgraded them, in a similar way there seems to be a suggestion on TM that the Morgan dash module PCB fails because the diodes used either aren't the best quality, or simply were not correctly specified to cope with the peak inverse voltage spike (Back EMF) produced by the relays.
I made my electronics engineer aware of this when I dropped off Monty's board for checking over and repair, I encouraged Richard to make his own diode value calculations rather than just replicating what was originally used as it's very possible they were underspecified from new?
Let’s see what he reports back with, who knows if I'm lucky, perhaps like my Potterton boiler control board my Morgan dash module will come back better than new and with the original fault removed for good?
Dave.
