DEC H745 regulator common failure modes?

[Pontus Pihlgren]

On Fri, Nov 27, 2015 at 11:29:32AM +0100, Johnny Billquist wrote:
> On 2015-11-27 06:13, Pontus Pihlgren wrote:
> >I can only say that they fail often. We have replaced lots in
> >our 11/70. Luckily we have had spares.
> >
> >Sometimes the failure has been rather catastrofic with blown
> >components. I think these modules run quite hot since
> >discoloured pcb:s are common.
> 
> I think we more often see failures in the H744(0) modules, but we've had
> failures in both, yes.

My memory is fussy, I recall failures in both 744(0) and 745, but not 
which one is more common. You are probably correct.

/P