I thought the 47 machine does have an output tone of 107.2 Hz. It's up to you whether you set the tone squelch on your radios for Rx.
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73, KI4PW / Paul
On Feb 12, 2019, at 12:41 AM, DrZ <@DrZ1953> wrote:
You are not right! The sub-audible Tone (CTCSS) is used to transmit to the repeater from your radio. The REPEATER always hears the tone on it's Receive frequency that you are sending to it, and, this allows the repeater to open to your radio transmissions. The tone opens the repeater for each and every transmission when you push the PTT switch. The 145.47Mhz machine uses a tone of 107.2 Hz on it's receive. You HEAR the repeater 600Hz up from the frequency that you that you actually transmit to the repeater (144.870) on your transmit frequency only.. With a tone to the repeater of 107.2 to open it. In this case you actually transmit to the repeater on 144.870Mhz with a tone. Tone is used on transmit only. Tone must be transmitted to the repeater for it to open and work. Tone is a way of squelching a repeater from interference to and from other repeaters.
Now... the UHF repeater uses a different Tone. Check out the Arlington web page or buy a repeater directory for other tones for other repeaters.! Repeaters are listed in the directories by receive frequency. And, plus or minus is used to tell you if your transmit frequency is above or below the repeaters output frequency. Almost all repeaters in Virginia and the country use CTCSS tones on the repeaters Receive frequency.
The webpage is absolutely correct: I have reprinted the Website extract for you.
"About W4WVP Repeaters
The W4WVP 2-meter repeater is located in Arlington County and utilizes several remote receivers. This repeater is open for general amateur use. It transmits on 145.47 MHz and receives on 144.87 MHz. A subaudible PL (CTCSS) tone of 107.2 Hz is required on your 144.87 MHz signal to access it.
The W4WVP 70-cm repeater, donated by member Dennis Welch, WB7VUM, is also located in Arlington County and is open for general amateur use. It transmits on 449.325 MHz and receives on 444.325 MHz. A subaudible PL (CTCSS) tone of 151.4 Hz is required on your 444.325 MHz signal to access it."
YOU never transmit on the repeater's output frequency of 145.47Mhz. ... unless it is a simplex test only or the repeater is down. 145.47Mhz is where the repeater transmits only and no tone is required for you to receive.
From: AARC-PUBLIC@groups.io <AARC-PUBLIC@groups.io> On Behalf Of John Person
Sent: Monday, February 11, 2019 19:02
Subject: [AARC-PUBLIC] Sub audible tones for our repeaters on website
Dear Fellow AARC people
Attached is a page from our website.
My reading shows the subaudible tones on the listening channels.
I am right?
From: AARC-PUBLIC@groups.io <AARC-PUBLIC@groups.io> On Behalf Of Benn Kobb
Sent: Wednesday, February 6, 2019 6:15 AM
Subject: [AARC-PUBLIC] AMSAT Symposium Ballston
The 2019 AMSAT 50th Anniversary Symposium will take place on October 18 – 20 at the Hilton Arlington in Arlington, Virginia, next to Washington, DC. Connected to the Ballston Metro Station, the hotel offers easy access to the capital’s top tourist destinations, and tours will be available; it’s 6 miles from Reagan National Airport. The AMSAT Board of Directors will meet on October 16 – 17. — From ARRL News
Al Zodun / K4ZB