Question 1

What is the FT8 dial frequency for 20 meters?

Accepted Answer

The standard FT8 dial frequency for 20 meters (20m) is 14.074 MHz USB. WSJT-X uses the full passband from 500–3000 Hz above that dial frequency.

Question 2

What is the FT8 dial frequency for 40 meters?

Accepted Answer

The standard FT8 dial frequency for 40 meters (40m) is 7.074 MHz USB in the USA.

Question 3

What is the FT8 dial frequency for 80 meters?

Accepted Answer

The standard FT8 dial frequency for 80 meters (80m) is 3.573 MHz USB in the USA.

Question 4

What frequency does FT4 use on 20 meters?

Accepted Answer

FT4 on 20 meters uses a dial frequency of 14.080 MHz USB. This is the WSJT-X default for 20m FT4.

Question 5

What is the APRS frequency on 2 meters?

Accepted Answer

The US national APRS frequency on 2 meters is 144.390 MHz FM at 1200 baud AFSK. For ISS APRS, use 145.825 MHz.

Question 6

What is the PSK31 frequency on 20 meters?

Accepted Answer

The PSK31 watering hole on 20 meters is 14.070 MHz USB, with the audio offset tuned to +1000 to +1500 Hz.

Question 7

What frequency does JS8Call use on 40 meters?

Accepted Answer

JS8Call on 40 meters uses a dial frequency of 7.078 MHz USB.

Question 8

What is the FT8 frequency on 17 meters?

Accepted Answer

The FT8 dial frequency for 17 meters (17m) is 18.100 MHz USB.

Question 9

What is the FT8 frequency on 60 meters?

Accepted Answer

FT8 on 60 meters uses 5.357 MHz USB (channel 3). Other digital modes on 60m require coordinated channel use per FCC Part 97.

Question 10

What is the Olivia digital mode?

Accepted Answer

Olivia is a weak-signal keyboard-to-keyboard MFSK digital mode capable of copy under very poor band conditions. On 20 meters the calling frequency is 14.106 MHz USB with the audio center at +1000 Hz.

Question 11

What is VARA HF used for?

Accepted Answer

VARA HF is a high-performance modem used primarily for Winlink email over radio and peer-to-peer connections on HF. On 20 meters the standard P2P frequency is 14.103 MHz USB with the audio center at +1500 Hz.

FT8	Weak-signal 15-second exchange via WSJT-X. Most popular HF digital mode. Full passband (500–3000 Hz above dial).	RTTY	Radioteletype — the classic digital mode. Widely used in HF contesting. AFSK on USB; audio tones vary by software.
FT4	Faster variant of FT8 with 7.5-second sequences. Primarily used during contest events. Full passband.	OLIVIA	MFSK weak-signal mode capable of copy under extremely poor conditions. Slower but very robust. Audio center at +1000 Hz.
JS8CALL	FT8-based keyboard-to-keyboard messaging with store-and-forward. Good for casual conversations and relay nets. Full passband.	VARA HF	High-performance modem for Winlink email over radio and peer-to-peer HF connections. Audio center at +1500 Hz.
PSK31	Real-time keyboard-to-keyboard QSO mode. Very narrow bandwidth (<100 Hz), excellent for crowded bands. Tune audio to +1000–1500 Hz above dial.

BAND	FT8 USB	FT4 USB	JS8CALL USB	PSK31 USB	RTTY USB	OLIVIA USB	VARA HF USB
10m	28.074	28.180	28.078	28.120	28.080	28.1215	28.1385
12m	24.915	24.919	24.922	24.920	24.920	—	—
15m	21.074	21.140	21.078	21.070	21.080	21.1285	21.1035
17m	18.100	18.104	18.104	18.100	18.100	18.106	18.106
20m	14.074	14.080	14.078	14.070	14.080	14.1065	14.1035
30m	10.136	10.140	10.130	10.142	10.130	10.141	10.144
40m	7.074	7.0475	7.078	7.070	7.080	7.0715	7.1015
60m	5.357	—	—	—	—	—	—
80m	3.573	3.575	3.578	3.580	3.580	3.5625	3.601

MODE	BAND	VFO DIAL	MODULATION	NOTES
FT8	6m	50.313 MHz	USB	Passband 500–3000 Hz · WSJT-X
FT8	2m	144.174 MHz	USB	Passband 500–3000 Hz · WSJT-X
FT8	70cm	432.174 MHz	USB	Passband 500–3000 Hz · WSJT-X
APRS	2m	144.390 MHz	FM	US National · 1200 baud AFSK
APRS (ISS)	2m	145.825 MHz	FM	ISS Digipeater · 1200 baud AFSK
Packet / Winlink	2m	145.010 MHz	FM	National Packet / BBS
Packet / Winlink	2m	145.030 MHz	FM	National Packet / BBS
Packet / Winlink	2m	145.050 MHz	FM	National Packet / BBS

COMMON HF DIGITAL FREQUENCIES (USA)

VHF/UHF DIGITAL & PACKET (NATIONAL STANDARDS)