VarAC Quick Start Guide
- irad d
- Oct 14
- 5 min read
For non-english versions of this manual:
Before you start
Great! you have successfully downloaded VarAC, now what?
This short guide will help to make your first steps in the VarAC world and conduct your first successful QSO using VarAC while highlighting the "must-know" features.
VarAC is not just an application. It's a vibrant community with:
Agreed calling (gathering) QRGs all across the spectrum
Super active Facebook group page
We welcome you to join us on the forum and the Facebook page so you can ask questions, debate about new features and more.
Now lets dig in.
Some VarAC users have published great video tutorials that can help you to get started:
VarAC for newbies by N5HYP: "VarAC presented by Thomas Schuessler @ Cowtown Hamfest 18 Jan 25"
VarAC for newbies by ND3N: "The Best Digital RagChew Mode for HF? Absolutely!"
VarAC for newbies by Tech Minds: "VarAC chat client for VARA-HF BETTER THAN FT8!"uide
Basic VarAC configuration
Make sure you installed VARA-HF modem. It can be downloaded from HERE
Install VarAC in a dedicated directory. c:\VarAC can be a good place. DO NOT run it directly from the zip file!
Launch VarAC by double clicking the VarAC.exe file.
You will be asked to enter your callsign in the "My callsign" text box.
On the top menu select: Settings --> RIG control & VARA Configuration
Set your desired PTT and Frequency control modes (CAT/OmniRig/RTS/DTR) and use the TEST buttons to make sure they work. You can find here some screenshots of popular rigs configurations made by VarAC community members.
To allow VarAC to automatically launch your VARA modem, tell VarAC where the VaraHF modem is located under the "VARAHF main file path" section. Point it out to the VARAHF.EXE file you installed on step #1 (or VARAFM.EXE if you use VaraFM)
Make sure you select the right VaraHF port in the "VARAHF main port" section. The default port of VaraHF modem is 8300
Click "SAVE & CLOSE"
More detailed information about configuring VarAC can be found in this complete installation guide manual.
Where should I tune to find people to chat with?
Our main calling (gathering) frequencies are (USB dial) :
You can also use PSKReporter to see where people are currently QRVing
Primary VarAC frequencies - where you will find most of the traffic:
20m - 14.105 MHz
15m - 21.105 MHz
10m - 28.105 MHz
40m - 7.105 MHz
80m - 3.595 MHz
Additional VarAC frequencies:
160m - 1.995 MHz
60m - 5.355 MHz
30m - 10.133 MHz
17m - 18.107 MHz
12m - 24.927 MHz
6m - 50.330 MHz
Calling CQ
Calling CQ takes place on the calling frequencies that are mentioned above.
When calling CQ, you can select a SLOT frequency in which you will wait for incoming connections.
Your CQ call encodes this SLOT ID so other parties knows where to connect with you.
If you set VarAC to control your RIG frequency (through CAT control or Omnirig), then VarAC will automatically QSY to the SLOT frequency after the CQ call ends.
When you call CQ, your call will be both seen and heard (alarm sound) on other VarAC users' desktops who are tuned to the same frequency as you are.
Beacons
Beacon is a "Soft CQ call" that will fire every 15 minutes letting people know that you are online and ready for a connection.
Tip
You can see who spotted your Beacons on PSKReporter. You have button in VarAC just for that.
What should I use than?
Looking for someone to chat with NOW? Hit the CQ button. Got no answer? try again a couple of times.
Want to leave your RIG open and accept incoming connections while you mind your own business - hit the BEACON button.
Tip
If you leave your RIG on the QRG with VarAC open, you will intercept other users' beacons.
Double clicking their callsign will connect with them.
How do I connect with someone?
There are 3 simple ways to start a QSO:
Double click a callsign on the "Last heard CQ" section.
Double click a callsign on the "Last heard Beacons" section
Type the callsign you wish to connect to into the "Connect to" textbox and hit "CONNECT"
What are all these texts & numbers I see when connected to someone?
Upon connections you will see texts like "<R-10>" or "de YOURCALL"
Like in FT8, VarAC exchanges SNR reports with the other side so you know how you are being heard and also for logging purposes.
VarAC periodically sends your callsign on air to comply with "self identification" regulations.
VarAC gestures
Guesters are TEXT CODES that when typed as part of your chat message, will trigger an event on the other side such as:
"DING!" - will make sound
"HIHI" - will make a smiley emoji 😀😀
"TU!" - will say "THANK YOU 🙏"
Hit the "GUESTERS" button to see more options.
Tip
Connected to someone but they are not there?
Write "DING!" to make some noise on their end to drag their attention
Canned messages & VarAC Tags
Canned messages are pre-defined texts like your information, 73 blessings, ASCII art etc.
You can configure your canned messages under the settings menu.
You can then attach one to your chat message by selecting it from the "Load a canned message" dropdown menu.
VarAC Tags are used either manually or in canned messages to send information that will be decoded by the other side and automatically populate the QSO log with your name, QTH & locator.
Tip
We strongly recommend that you set your information tags within a canned message.
This will allow your partner to get all your information directly into their log entry.
Ending a QSO
Be polite, say 73's (or use one of the configurable canned message) and hit the "DISCONNECT" button.
Need to eject quickly ? Hit the "ABORT" button.
Logging the QSO
VarAC logs QSOs in an ADIF file in the VarAC installation directory under the name VarAC_qso_log.adi .
You can set VarAC to automatically log your QSO upon disconnection, or manually log it by clicking the "LOG" button.
Tip
You can have your QSO uploaded automatically to QRZ.COM and other log systems.
Read this manual to see an example.
Broadcasts
VarAC allows you to send anychroneous messages - also known by the name broadcast. A broadcast is a AX25 message (similar to APRS). You can send to one person or to all. Unlike a VarAC QSO, there is no delivery-guaranteed mechanism in broadcasts.
Tip
You can use broadcasts for group chat when you and your partners have good signals
The QSY code of behavior
The calling frequencies are used for finding QSO mates and for short QSOs only.
If you are enjoying your QSO and want to continue chatting with your partner, then immediatly after connection, invite your partner to QSY. You don't need to disconnect. QSY happens while you are connected
How? This is done by clicking the QSYU/QSYD buttons that will take you +/- 750Hz
This will initiate a QSY request that will instruct both sides to change frequency while chatting.
If set your CAT frequency control under the VarAC settings menu, then VarAC will QSY for you automatically.
Again: No need to disconnect prior or during to the QSY.
Still have questions ?
This quick start guide include the must have things you need to know. But VarAC has so many other features you can explore such as File transfer, Frequency scheduler, PSKreporter integration, Last heard peeking etc.
We will be happy to assist you in the onboarding process. Post your question on the forum or on our Facebook group page.
You won't wait long for an answer :)
You can also find more VarAC manuals here.
We wish you luck in making your first steps with VarAC and hope you enjoy it.
73s and good luck in your VarAC journey. It's gonna be fun!
Irad 4Z1AC and the VarAC team