Richmond Amateur Telecommunications Society
W4RAT · Richmond, Virginia

An ARRL Affiliated Club Serving Central Virginia Since 1972
442.550 MHz FM · 443.5875 MHz DMR · 146.880 MHz C4FM

W4RAT VHF FM+C4FM Repeater

The W4RAT 146.88 MHz repeater first went on the air in 1971. Transmitting 20 watts from 680 feet above Chesterfield Town Center, this repeater was upgraded from analog to dual-mode C4FM operation on September 21, 2024.

The repeater is open to all licensed amateurs. You do not need to be a member of the club to use our repeater. Please take a moment to become familiar with our Repeater Rules and basic repeater etiquette before going on the air. RATS members needing help accessing the repeater may reach out to their Technical Committee.

Frequency: 146.880 MHz, -600 kHz offset
Call Sign: W4RAT
Mode: Wideband FM (in & out), C4FM (in & out)
Parameters: PL 74.4 Hz
Repeater: Yaesu DR-2X
Antenna: Commscope DB-224E 8.1 dBi @ 680 feet
TX Power: 20 watts
Coverage Map: Click here

This is primarily a digital repeater. Digital traffic takes precedence. It stays linked 24/7 to a network of other repeaters. Only digital traffic passes over this link. As a result, stations on linked repeaters will not hear our local analog traffic and may start a digital QSO at any time. Analog stations must yield.

Because this repeater may transmit in either analog or digital mode - as determined by the incoming signal - users of analog-only radios should ensure their radio is set to utilize a 74.4 Hz receive PL tone. This will prevent the squelch from opening for the "noise" of digital signals. However, it will be necessary to look at the signal meter or receive activity light on your radio before transmitting in analog mode to ensure you are not colliding with existing digital traffic. Only one mode may be active at a time.

C4FM/WIRES-X users should disable their radio's Automatic Mode Selection feature to prevent unwanted mode changes during QSOs when using a dual-mode system such as the 146.88 repeater. C4FM radios must digitally transmit a valid FCC call sign. Radios with improper ID will be blocked from the WIRES-X network.

Listen Online

You can listen live to this repeater 24/7 on the Broadcastify network. See our Streaming page for links.

WIRES-X Available Here

Club member Mike Friedman W4MAF put together an excellent presentation on the capabilities of our WIRES-X system in March 2022. We have a copy of it here. New users of the W4RAT 146.88 WIRES-X system should review this to become familiar with local operating practices and the characteristics of our particular system. (WIRES-X operation was moved from 442.55 to 146.88 on September 21, 2024.)

Regional Linking via the Virginia Room

Unless a user has temporarily connected the repeater elsewhere, the 146.88 machine stays linked to the Virginia Room (#21625) along with several other repeaters in the region. A weekly net is held on Saturday nights at 8:00 PM.

WIRES-X traffic from these systems will be carried on the digital portion of the repeater and will not be heard by analog users.

Questions about the WIRES-X system on the VHF repeater may be directed to the Technical Committee generally or Mike Friedman W4MAF specifically.

Special Events on the 146.88 Repeater

As of September 21, 2024, RATS is no longer routinely approving the use of the 146.88 repeater for special events such as public service and EMCOMM activities. Our UHF FM and DMR repeaters are available for these purposes.

Richmond Amateur Telecommunications Society, Inc. (RATS) is a 501(c)(3) non-profit organization. PO Box 70613, Henrico VA, 23255
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Richmond Amateur Telecommunications Society W4RAT · Richmond, Virginia

An ARRL Affiliated Club Serving Central Virginia Since 1972442.550 MHz FM · 443.5875 MHz DMR · 146.880 MHz C4FM