What are the FT4 frequencies?

As initial guidelines we suggest the following default dial frequencies for FT4: 3.595, 7.090, 10.140, 14.140, 18.104, 21.140, 24.919, 28.180, 50.318, 144.170 MHz.

What does PSK31 sound like?

A PSK31 signal just sounds like a single tone or note with a slight wobble and is used for real-time keyboard-to-keyboard informal text “chats” over the air. It works very well with low power levels and for this reason it has become a firm favourite for QRP and stealth antenna operators.

What is PSK in ham radio?

PSK stands for phase shift keying, and 31 represents the 31.25-baud rate of the signal — about regular typing speed. It also uses a new coding system for characters, called Varicode, that has a different number of bits for different characters, not unlike Morse code.

What does the number 31 represent in PSK31?

The number 31 in the abbreviation for PSK31 is the approximate transmitted symbol rate. PSK31 is a type of data mode of “Phase Shift Keying” at “31 baud.” The actual baud rate used is 31.25 Hz.

Is FT8 legal on 60 meters?

As written, the FCC states that PSK31 and Pactor III may be used on 60 meters. Pactor III is a full 2 kHz wide – several dozen FT8 stations can operate within that bandwidth. FT8 activity takes place on a VFO frequency of 5357.0 kHz.

What is FT4 in blood test results?

This test measures the level of free T 4, or free thyroxine, in your blood. A free T 4 test is used to find out how well your thyroid gland is working. T 4 is 1 of 2 hormones produced by the thyroid, a butterfly-shaped gland in your neck.

Is RTTY A FSK?

Most modern transceivers today have an FSK input. By using the FSK input to your transceiver, you can then operate the radio in the RTTY or FSK position and make use of filters available for receiving RTTY, such as a narrow 250hz or 500hz IF filter.

Is RTTY a Morse code?

RTTY was widely used for commercial applications where it enabled printed messages to be sent quickly and without the need for a trained Morse operator. Once surplus equipment started to become available, radio amateurs started to use RTTY, and it soon became popular.

What is the maximum power limit on the 60 meter band?

The effective radiated power limit in the 60 meter band is raised by 3 dB, from 50 W PEP to 100 W PEP, relative to a half-wave dipole.

When did Peter Martinez come up with PSK31?

PSK31 was developed by Peter Martinez (G3PLX) and introduced to the amateur radio community in late 1998. The mode was enthusiastically received and has since quickly spread into worldwide use.

When did the PSK31 modulation system come out?

PSK31 was developed and named by English amateur radio operator Peter Martinez ( call sign G3PLX) and introduced to the wider amateur radio community in December 1998. The 31 baud BPSK modulation system used in PSK31 was introduced by Pawel Jalocha (SP9VRC) in his SLOWBPSK program written for Motorola’s EVM radio.

What kind of radio frequencies are used for PSK31?

The following amateur radio frequencies are commonly used for transmitting and receiving PSK31 signals. They normally occupy the lower edge of each band’s digital modes section.

What kind of keying does PSK31 use?

Based on an idea by SP9VRC and developed by Peter Martinez, G3PLX (1) a new Amateur Mode called PSK31 is emerging. Instead of keying using Frequency Shift, FSK, this mode uses Phase Shift Keying, PSK. It uses an alphabet similar to Morse, which gives a text speed of about 50-wpm.