Hi, Not strictly true. Material is not important apart from environmental (corrosion) issues, but that is not the only concern. WG-16 (British) / WR 90 flanges are not dowelled. They rely on the fastners for alignment. The correct fastners are 5/32" shoulder screws (0.1557" dia 6-32 thread). The precsion shoulder locates the flanges. 5/32" bolts (a bolt has a plain shank) are a good second choice but you will probably have to pack them with washers as the grip length won't match ;-) If you have to use screws, at least align two diagonal holes with 5/32" dowels while nipping up the first two screws. Robert G8RPI.
--- On Sun, 19/9/10, jimlux <[email protected]> wrote: From: jimlux <[email protected]> Subject: Re: [time-nuts] Semi-OT: Hardware for WR-90 waveguide sections? To: "Discussion of precise time and frequency measurement" <[email protected]> Date: Sunday, 19 September, 2010, 4:13 [email protected] wrote: > Not completely OT, as stable and accurate timebases are very useful in > microwave systems... > What's the proper hardware to use for connecting WR-90 (10GHz) waveguide > sections? I figure 8-32 brass or stainless, avoiding anything magnetic. > whatever fits through the holes in the flanges. #8 requires a 0.187 hole, #6 requires a 0.156, #4 is 0.125, #2 is 0.109 One reference I have says WR90 has 0.169" holes, so that's #6 hardware. Whether it is magnetic or not doesn't make any difference. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
