Re: Running a Repeater on a FM Broadcast Tower
|
Depending on your preferences… “best practices” are always open to interpretation. While there may not be any other 400MHz UHF gear on the tower today, that might not be the case tomorrow. I get mildly amused when something new shows up on a tower and other repeater owners suddenly have an issue they have to mitigate, that might take them months. Is an IM panel and rx filtering really overkill? ? Sometimes a simple stub may be placed to dump the broadcast (this has been covered recently on the list.) ? I run isolators on all my gear, which of course has a low pass on the tx side, and on the rx I almost always have a band pass. ? Matt AL0R ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of steven harvey via groups.io
Sent: Thursday, March 13, 2025 09:49
To: [email protected]
Subject: [repeater-builder] Running a Repeater on a FM Broadcast Tower ? I'm in the investigation stage of relocating a repeater to a FM broadcast tower site.??? I've been on several LMR towers and not had any issues but wanted to see if there is any best practices I could learn from on what equipment should be mandatory for being on a FM broadcast tower site.??? I have listed what I have so far.? Any additional equipment please 1. The repeater will be on the UHF spectrum of the ham radio side. 2. It will be running a Kenwood NXR-1800K2 repeater with TXRX duplexers with a 100DB isolation between sides. 3.? Height will be between 350 to 400 ft 5. Cable is 1 5/8" hard line that was run but never used and capped off. 4. Antenna will be a commander technologies fiberglass antenna being side mounted on the tower with polyphaser lightening protection attached and grounded. 4a.? Jumpers will be 1/2 hardline between the antenna and 1 5/8" and the same going into the building. 5.? The radio station broadcast on 93.7 a with a ERP of 37,000 Watts and there antenna is at the 550ft mark. 6.? There only two 800Mhz commercial antenna's on the tower and a couple of Wifi provider dishes.?? I'll be above all of that equipment.
|
