146.52 MHz
A place for those of us who support the greater use of 146.52 MHz simplex on North American roads; it’s up to us!
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Monitor Two Frequences at Once
Monitor Two Frequences at Once
I have call setter plates on car and my mobile rig set to a local repeater. It has occurred to me that it might be a good idea to have 146.52 displayed on the rear bumper to tell any ham passing me that I’m on that frequency for direct contact. But, as I mentioned, my mobile is set for a local repeater. Does anyone know of any 2 meter rigs that can monitor two or more frequencies at once?
- 6 Replies
205
Hi Lind.
Sorry for the lengthy reply, but it’s a really good question and many hams aren’t familiar with the concept.
The feature you are referring to is commonly called “dual watch”, “dual receive”, or “priority scan”, depending on the specific implementation and the manufacturer’s terminology. Here is a breakdown of these terms:
Dual Watch: The radio monitors one primary frequency while intermittently checking another frequency for activity. When a signal is detected on the secondary frequency, the radio alerts the user or switches to it.
Dual Receive: The radio can simultaneously monitor and receive on two different frequencies, often on the same or different bands. This is a more advanced feature and usually requires dual VFOs (Variable Frequency Oscillators).
Priority Scan: The radio scans a list of frequencies but gives priority to a designated “priority channel,” checking it more frequently for activity.
Radios with Dual Watch/Dual Receive
Here is a list of a few of the handheld and mobile rigs, I’ve also included a couple of base stations, that support dual watch or dual receive:
Handheld Radios (HTs)
1. Yaesu FT-5DR
• Dual-band (VHF/UHF) with dual receive capability. Monitors two frequencies simultaneously, including digital (C4FM) and analog.
2. Icom ID-52A
• Dual-band D-STAR digital and analog with dual receive. Simultaneous reception on two VHF/UHF frequencies.
3. Kenwood TH-D74A
• Dual-band with D-STAR support and dual receive. Supports simultaneous APRS tracking and voice monitoring.
4. Anytone AT-D878UVII Plus
• Dual-band DMR/analog with dual watch capability. Monitors two frequencies or time slots.
Mobile Radios
1. Yaesu FTM-300DR
• Dual-band with dual receive for analog and C4FM. Monitors two frequencies independently.
2. Icom IC-2730A (I have this one and love it. Not expensive and works great).
• Dual-band analog FM with true dual receive. Allows full independent control of both bands.
3. Kenwood TM-V71A
• Dual-band analog with dual receive. Cross-band repeat capability.
4. Anytone AT-578UVIII Pro
• Dual-band DMR/analog with dual receive. Monitors two frequencies or digital time slots.
Base Radios
1. Yaesu FTM-500DR
• Dual-band base/mobile with true dual receive. Supports monitoring VHF/UHF simultaneously.
2. Icom IC-9700
• Tri-band base radio (VHF/UHF/1.2 GHz) with dual receive. Designed for satellite and terrestrial operation.
3. Kenwood TS-2000
• Multi-band base radio with dual receive, including VHF/UHF. Capable of satellite and cross-band operation.
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By the way, don’t forget to sign your support on https://14652.org
14652.org
14652.org is a public service website supported by Ham Community, promoting the responsible use of a national simplex calling frequency to enhance road safety and mutual assistance among amateur radio operators.
- 10
The Icom ID-5100 is a great mobile radio that can monitor and transmit on two frequencies. It can also be used as a cross band repeater (UHF to VHF or vice versa).
- 10
You mention the frequency of 146.59. I take it you are talking about 146.52 National Calling Frequency (Simplex). K3MRI gave a great explanation. There are other radios like Alinco that have had the priority feature.
On a different note, A wile back, Kenwood was giving stickers that had “Monitoring 146.52.” printed on them.
When I have gone to Hamfest, sometimes I make a sign or with white shoe polish I write 146.52 on the glass, and when I operate APRS, I do add “Monitoring 146.52”
- 205
Hi Bobby. We have our own Ham Boutique magnets now also; see below.
As for 146.59, knowing Lind, that was just a typo. Lind is an old wolf who knows his stuff well I was going to edit it out but decided it was obvious.
Here’s the link to the magnets…
https://hamboutique.com/products/146-52-mhz-car-magnet
hamboutique.com
Are you an amateur radio operator who believes in the power of communication and community while on the road? Our .30 mil Car Magnet is designed for you! Proudly display your commitment to monitoring the 146.52 MHz frequency—the nationwide simplex … Continue reading
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Done. Decided to edit it 😎
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