Richard, I once had an HP spectrum analyzer than had a dim screen after 10+ years of operation. Moving the display centering to use other parts of the phospher didn't help.
I then removed the display glass and found a thin, even, layer of dust on the CRT. Thank you, electrostatic precipitation. Cleaning the CRT (and display glass) made the display look like new. Pat On Sat, Jun 28, 2014 at 2:40 AM, Richard Marshall <[email protected]> wrote: > Hi, > > I too am the recent proud owner of an HP8753B Network Analyser; a > mind-blowingly clever piece of equipment. Recommended for its Educational > and practical value!. > > As received, the fan ran - but was very noisy. I replaced the fan with an > EBM-Papst 4414M, which was slightly quieter - but not as much improvement as > I had hoped. > > The CRT screen display was a bit dim, but I achieved a surprising and very > useful improvement by following the procedure for re-centering the screen > display. This brought new areas of phosphor into use for the graticule and > all the screen data. Much easier to read now. > > My remaining problem is intermittant uncertain contact closure of the > various push-buttons - -presumably dirt or weak springs. If anyone knows > how to remedy or get replacements please advise! > > > Richard Marshall > MA, CEng., FIEE, FInst.P, FIET > > Richard Marshall Laboratories > 30 Ox Lane, Harpenden, Herts. > AL5 4HE UK > Phone +44 (0)1582 460815 www.design-emc.co.uk > Member of the EMC Industry Association > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected]> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <[email protected]> > Mike Cantwell <[email protected]> > > For policy questions, send mail to: > Jim Bacher <[email protected]> > David Heald <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
