On Mon, Feb 11, 2013 at 1:00 PM, Christopher Hilton-Johnson
<chj@...> wrote:
Raymond
The good news is that replacing the Motorola part with the Tek specified item produces a cure & all is good again.
Probably not relevant but the Motorola part was aluminium, and featherweight, the original part is steel and of substance. I think the problem was junction heat related, in that there was a direct relationship between length of 'off' time, in days, and 'on' time in minutes, with a minimum of 1 day 'off' to get any 'on' time at all.
I don't think there's a significant thermal performance difference
between steel and aluminum TO3s.
