Didn't the H7420 , which replaced the H742,  use that also? The H742 uses a
different one .
On Thu, Jun 6, 2019 at 9:07 AM Noel Chiappa via cctalk <
cctalk at classiccmp.org> wrote:
   From: Systems
Glitch 
  I finally fixed the power supply in my PDP-11/10S
... For those who
 have original 5411086s that haven't failed yet, you might want to
 make up a little pigtail with an inline fuse holder. 
 Congratulations, and a great blog write-up.
 The issue you point out (lack of fusing for some components on the +15V
 board) will of course apply to not just -11/10S's, but any -11 which uses
 the H765, either for the CPU box (e.g. /04, /34) or for an expansion box.
 This is important enough that I think I'll add a writeup to the CHWiki
 article for that:
   
http://gunkies.org/wiki/H765_Power_System
 which restates the problem, and the proposed solution. (I also should check
 to see if the H742 uses the same 15V board; it uses the same 'bricks', so
 it may.)
         Noel