On Air Sign

HF/FM Digital Chat

For fun or for EmComm

by Irad Deutsch, 4Z1AC

IMPORTANT NOTE: VarAC requires VARA-HF V4.6.7 or higher / VARA-FM V4.2.6


What is VarAC?

VarAC is a FREE, modern HF P2P real-time chatting application
for the amateur radio operator
that leverages the glorious VARA protocol


Calling QRGs (USB dial)


20m - 14.105 MHz 

15m - 21.105 MHz

10m - 28.105 MHz

40m - 7.105 MHz

80m - 3.595 MHz


160m - 1.995 MHz

60m - 5.355 MHz

30m - 10.133 MHz
17m - 18.107 MHz
12m - 24.927 MHz
6m - 50.330 MHz

Amateur radio frequencies are for us all.

They are not mine nor yours. ITS OURS

Please be respectful and monitor the frequency before transmitting

Car radio
Typing on a Computer_edited.jpg

VarAC main features

CQ calls

Call CQ using the VARA protocol

"Is typing"

See if your partner is currently typing

Chat gestures

Having fun while chatting with sounds & emojis

RIG Control

Supporting CAT command, RTS/DTS & OmniRig

Frequency Monitor

Monitor the frequency for ongoing QSOs

Message queue

Type as many messages as you'd like

Realtime metrics

For best QSO performance monitoring

Automatic messages

Set preconfigured welcome & away messages

Canned messages

Create predefined messages (RIG, Info...)

500/2300Hz support

Select your desired QSO bandwidth


Let other people know you are standing by


No more typos. Spell check as you type

Send files & images

Supporting binary files, text, Images and more

Seamless QSY

Move QSO up or down with a single mouse click

Auto QSO logging

Supporting ADIF format and popular QSO loggers

Customized look

Chose the colors/fonts you like. Use dark mode.

Stack of Newspapers

Recent VarAC coverage

(Selected publications)

Sep, 2022

Aug, 2022

Jul, 2022

April 2022


Great chat experience

Bringing the "cool" factor into HF/FM digital chats