Quoting [EMAIL PROTECTED]: > At 4/27/2007 06:34, you wrote: > >> How about a diplexer from Comet or Diamond? I looked into this > > They work fine provided you use the model WITHOUT the pigtail leads, IOW > all connectors must be directly on the diplexer. Use only coax with > silver-plated braid (RG-214, 223, 142 or 400) or hardline to connect to > it. Also be careful with how much power to run to it. My systems that use > crossband diplexers all run relatively low power (no more than 30 watts); > others have reported problems with component overheating & failure at > higher power levels. If you plan on running 100 watts through it you > should test on the bench by running continuous higher power through it for > several hours. > > Bob NO6B > > > About a year ago we diplexed a Daniels VHF repeater (30 watts) with a GE master UHF repeater (15 watts) into a Sinclair 210 C4. Install went well and worked good with reasonable antenna paterns. Recently we upgraded the UHF repeater to another Daniels (25 watts). The new repeater did not like the diplexer. The TX went into SWR shutdown and was not happy at all. Solution was to install a UHF 4 pole without the diplexer and life became good. We are not sure if we were being had or not, but we now are sucpicious of diplexers. I guess we did not re invent the wheel.
Roger VA7RS
