9

Many radio manufacturers are aware that people don't want to hear CTCSS tones - so they put high-pass filters on both the output (speaker) and input (microphone). That eliminates the tone before it gets to your ears, and will also prevent an errant tone near the microphone from triggering a repeater somewhere. Some of us might not agree that the tones are ...


3

Same with SDR software. My SDR code runs on a iPhone that's connected to "HiFi" audio transducers. So I had to add a 270 Hz high-pass biquad IIR audio filtering subroutine to get rid of annoying hum when listening to NFM from local 2M repeaters. (I obviously switch that subroutine out when listening to broadcast wideband FM music.)


3

The volume of the tones is typically low enough with respect to the voice signal that you can't hear it. Occasionally the tone generator in a radio will be poorly calibrated, and you do hear it. Usually the radio has a tone scan function, and you can use that to find out what tone is being used. You can also turn on tone squelch if you have the tone set ...


2

The tone values for Tone mode and CTCSS mode are stored separately in the TM-V71A. If you set the value when you set up for tone and then change into CTCSS mode, you'll be back at the default 88.5. Make sure to set the tone value to your desired tone after entering CTCSS mode.


1

You might try changing the Tone Mode from TSQL to just Tone. TSQL mode does two things: sends a tone on transmit requires a tone on receive to break your radio's squelch Tone mode only does one thing: send a tone on transmit.


1

I too have an Alinco radio with a channel set for a Peak Radio Association repeater, which uses the same CDCSS (DCS) code. I just tried, and I was able to key up my local PRA repeater and hear its call sign back. My radio is not yet supported by CHIRP, so I had to use the Alinco software to program the radio. For that channel I have encode set to D023N (...


1

This topic came up in a discussion on a Facebook ham page. I had my own thoughts on legally narrowing the available listeners when setting up my mobile to cross-band repeat so as to catch it with my HT: Use a non-open-source digital mode. Yaesu’s C4FM-based System Fusion is a good example. It is registered with the FCC, but for all intents and purposes, ...


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