With SSB or CW, we do not have many opportunities. It was not a short-range communication with a neighbor country butĪ super-long distance communication across the continent. "(…) Last Summer, I did make a SUPER DX QSO on 6m band with JT65. Quoted from letter sent by Yoshi-san to Joe K1JT (original spelling): Multiple JT65 frequencies are listed on some bands, due to:Ī) Amateur radio band rules are different in some countries.ī) The need for alternate frequencies if QRM is experienced.Ĭ) Local or regional interference on a main frequency.ĭ) Coordination with the changing spectrum utilization of the amateur community.Į) The high popularity of a new mode-du-jour may create a temporary need to find a new or alternate calling frequency.į) There are many competing modes in the weak signal part of the digital bands.6m DX coordination proposal from Yoshi JP1LRT and Japan hams. Do not use JT65 in 10144kHz-10150kHz because JT65A is NOT COMPATIBLE with MFSK, FSK, HELL, OLIVIA, CONTESTIA, ALE400, or RTTY and can cause severe interference to fast time-sharing modes such as PACKET, PACTOR, ALE, PSKmail, and APRS. The long tone carrier duration of JT65 transmissions has potential to cause severe interference to other modes. JT65A should not be used in parts of the ham bands where faster digital modes are in use.Ĥ. Normal activity of JT65A is in the "weak signal" part of the ham bands, near the PSK, MFSK, and Olivia 500 frequencies. 20Watts ERP is maximum for normal activity and DXing in the 40metre to 10metre bands.ģ. Always use very low power on HF to avoid QRM to other JT65 signals and other modes. Always listen and observe the waterfall spectrum of signals on the frequency before transmitting, and during activity.Ģ. Operators should be careful of frequency selection, accurate clock, and calibration. Special Notes on Good Operating Procedure:ġ. JT65A/JT65/JT65-HF mode is normally used on HF, MF, LF and 6 meter bands.
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The system allows approximately +/-600Hz auto-tuning on receive. The lowest tone of the JT65 signal is normally 1270Hz. JT65A signal bandwidth extends about 200Hz above 1270.5Hz sync. Sync tone is the reference mouse-click frequency for JT65. Normal operation of JT65A is a sync audio frequency of 1270.5Hz. JT65A may be used in the 500Hz bandwidth segments of bandplans.
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JT65A signal is about 1.3+kHz higher than the VFO frequency JT65A operators use USB VFO FREQUENCY for spots. Note: before date 9/2011, the old JT65A frequency was 24920 kHz (changed to avoid QRM ) The JT65A frequency 12metres is 24917.0 kHz USB VFO. The JT65A alternate frequency 17meters is 18098.0 kHz USB VFO. The JT65A signal frequency is about 18103.3 to 18103.7 kHz. The JT65A frequency 17metres is 18102.0 kHz USB VFO. The JT65A signal frequency is about 7077.3 to 7077.7 kHz. The JT65A sync frequency (USA) is 7077.27 kHz
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The JT65A frequency 40meters (USA) is 7076.0 kHz USB VFO.
![jt65 android jt65 android](https://i.pinimg.com/564x/db/b8/9e/dbb89e657da7e847b40342f0b05549a3.jpg)
The JT65A signal frequency is about 7040.3 to 7040.7 kHz. The International JT65A sync frequency is 7040.27 kHz International JT65A frequency 40metres is 7039.0 kHz USB VFO. *Note: This transmit signal is within the 10140-10150kHz automatic digital sub-band. The JT65 signal frequency is about 10140.3 to 10140.7 kHz*. The JT65A frequency 30metres is 10139.0 kHz USB VFO. The JT65 signal frequency is about 14077.3 to 14077.7 kHz. The JT65a sync frequency is 14077.27 kHz. The JT65 frequency 20metres is 14076.0 kHz USB VFO. The most popular JT65A frequency is in the 20 Meter band: JT65A is suitable for use in the 500Hz Bandwidth segments of ham radio bandplans.