I would contact ETS-Lindgren in Texas. I believe they still sell that product, or at least should be able to provide you with documentation.
You might also attempt to locate Bill Royce (if he’s still alive), ex-Hewlett-Packard Packard, who was the designer of the comb generator following his retirement. Failing all the above, I can recommend harmonic comb generators from Advanced Electromagnetic Technology, Com-Power, or York Electronics. I’m sure there are others. The problem I observed with the original “Royce Generator” (EMCO 4630) was the dramatic fall-off in harmonics after about 650 MHz. I also wrote an article on DIY comb generators for Interference Technology some years back. Just search for “comb generator wyatt” or some such, and it should pop up. Kenneth Wyatt Woodland Park, CO Sent from my iPhone. > On Mar 30, 2018, at 12:56 AM, Richard Marshall > <00000aeebd4dc3f4-dmarc-requ...@ieee.org> wrote: > > Hi All, > I am trying to resurrect the Electronics of an EMCO model 4630 refrad comb > generator for use on an international standardisation project. Whilst in > storage for the last three years it has developed a fault, I think with the > 70 V power supply, but I do not have the schematic to help with further > investigation. > Can anyone supply me with a schematic of this comb generator, or other > circuit-board level technical information that might help? > > Thanks in anticipation, and a happy Easter to you all. > > Richard G3SBA > > Richard Marshall Laboratories, > 30 Ox Lane, Harpenden, Herts., AL5 4HE, UK > +44 (0)1582 460815 www.design-emc.co.uk > Member of the EMC Industry Association > > > Virus-free. www.avg.com > - > ---------------------------------------------------------------- > 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 > <emc-p...@ieee.org> > > 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 <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org> > David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
