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Re: Major Desense


 

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That has nothing to do with the desense.

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From: [email protected] <[email protected]> On Behalf Of DCFluX via groups.io
Sent: Sunday, May 11, 2025 10:25 PM
To: [email protected]
Subject: Re: [repeater-builder] Major Desense

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Replace the electrolytic capacitors on the PA of your MSR-2000.

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On Sun, May 11, 2025, 17:56 Bob Dengler via <no6b=[email protected]> wrote:

At 5/11/2025 05:22 PM, you wrote:

Mike, I have a site where the 224 on the VHF repeater is now about 3 feet from a T mobile antenna. Today, the cell electronics, including RF is up on the tower. The boxes are fed with 48 vdc and fiber. If I run 40 watts of RF on the MTR-2000 I have over 40 dB of desensing. I am running 1 watt right now which brings me down to about 10 dB of desensing. In a month of two I will have a tower climber look around for me. I am planning on installing a huster G6 as a transmit anteena, on the other side to the water tower ( the antenna will be clear of the water tower "dome". There will be no cell antennas close to it.


I have a telewave 6 cavity duplexer, that into a dummy load has no desense. None. I am convinced that my 147 MHz RF is into the broad band amps, and they are doing a wonderful job of spitting it back. I cann't yell at them ,they pay rent!


When I first moved into my home in the late '90s I could not operate a 2 meter repeater from here: switched mode power supplies in cable TV set top boxes in the neighbors' homes would mix my output to my input.? Then streaming happened & everyone got rid of their STBs, & now I can duplex on 2 meters but now the noise floor from LED street lighting makes the repeater deaf at night.

Bob NO6B

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