Hi Leroy, My UHF machine is a 100-watt mastr ii repeater. This has been on the air for the past 5 years and ran flawlessly. I've worked on many vhf mastr ii's for fellow repeater owners over the years. Have been used by hams for years and generally perform very well. Good rf specs, highly selective rx, although not as sensitive as most modern day receivers hams are used to. They are easily repaired if need-be. One of the easiest radios to interface and tune up. A fine choice for a repeater. concerning your interference, a receiver with better front end selectivity and a different 1st. IF freq. might be an inexpensive and worthwhile test you could try 1st. before moving on to other ideas. Hope this helps. Dan k8plw
--- On Fri, 3/5/10, Leroy A. M. Baptiste <leroybapti...@spiceisle.com> wrote: From: Leroy A. M. Baptiste <leroybapti...@spiceisle.com> Subject: RE: [Repeater-Builder] Re: Interference To: Repeater-Builder@yahoogroups.com Date: Friday, March 5, 2010, 9:23 AM Dan, have you had any experience using the GE Mastr 11 as a repeater, and if so what are your thoughts on it. -----Original Message----- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of Dan Saputo Sent: Friday, March 05, 2010 12:25 PM To: Repeater-Builder@ yahoogroups. com Subject: RE: [Repeater-Builder] Re: Interference Hi Leroy, Sounds like its coming straight into the antenna connector on rx since you mentioned it keeps the repeater keyed. If I'm not mistaken you also mentioned it cycles w/repeater tx? I'm guessing this is a commercial site with other systems in addition to your machine and the FM broadcast transmitters? The WP-641 duplexer you're using is a great duplexer, but doesn't offer much protection beyond the specific pass-reject frequencies its tuned for. Have you ever tried a different receiver on your system? It'd be interesting to connect another (high quality) receiver in place of what you have now as a test. Or try adding a bandpass cavity between rx and duplexer. Another pass cavity and/or isolator on the tx side might be a big help too. Dan k8plw --- On Thu, 3/4/10, Leroy A. M. Baptiste <leroybaptiste@ spiceisle. com> wrote: From: Leroy A. M. Baptiste <leroybaptiste@ spiceisle. com> Subject: RE: [Repeater-Builder] Re: Interference To: Repeater-Builder@ yahoogroups. com Date: Thursday, March 4, 2010, 8:44 PM Hi Laryn, no I did not get a chance to answer your questions, but here goes. The interference is holding the squelch open on the repeater receiver sometimes, which by extension holds the transmitter on, or cycles it, based on the interference into the receiver. The interference audio is not clean, it is distorted, the interference is not always there when you key up. Like I mentioned before, turning the FM transmitter off cures the problem. Hope that helps, and many thanks for your help. -----Original Message----- From: Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog roups.com> [mailto:Repeater- Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog roups.com> ] On Behalf Of larynl2 Sent: Friday, March 05, 2010 9:19 AM To: Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog roups.com> Subject: [Repeater-Builder] Re: Interference Leroy, perhaps you answered my questions from earlier today and I missed your answers. If you answered I apologize. So here they are again. > --- In Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. > com/mc/compose? to=Repeater- Builder%40yahoog roups.com> <mailto:Repeater- Builder%40yahoog roups.com> , "Leroy A. M. Baptiste" <leroybaptiste@ > wrote: > > > > When you key up the repeater, and you release, the > > repeater is held open (Sometimes) > What do you mean by "held open"? Is the interference opening/keeping open the squelch of the repeater receiver, or are you hearing it with the squelch closed during the TX tail? > > , and you can > > hear the interference coming in. Is the interference audio relatively clean/undistorted, or loud, raspy, distorted? Is the interference always there, or quite intermittent? Laryn K8TVZ
