At 3/29/2009 14:09, you wrote: >Ok, so I've got a nice looking db-4030 duplexer. >Little 6m repeater project cooking. > >Now, I've got the "tuning" sheet and also the scan of a fax of a >modification sheet for 6m. > >I also understand it's a reject only setup. > >My question is, what are the unterminated "T" connectors doing all over the >harness? > >Please forgive the terrible pictures, I used my cheap motorcycle MP4 camera. > >There are 4 "T" connectors that only have a plastic cap over the female >part. > >Just seems crazy to me.
Check out the last page of <http://www.repeater-builder.com/db/db-4032-low-band-duplexer.pdf>. According to the table at the lower right, 6 cables on the DB-4032 (6 can version of the DB-4030) are omitted for splits 1 MHz or greater. Also, unterminated T connectors @ VHF lowband are going to look pretty much like opens, since the line length is very short. Don't know how much leakage you'd get with SO239s; I do know that female Ns left open won't leak, especially @ 50 MHz.. Check the schematic in the above referenced page & see if it matches what you have, subtracting the 2 outside cans from the schematic. Bob NO6B
