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.Д¤. 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.ДЈ. 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.Дў. Operators should be careful of frequency selection, accurate clock, and calibration. Special Notes on Good Operating Procedure:ДЎ. JT65A/JT65/JT65-HF mode is normally used on HF, MF, LF and 6 meter bands. 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.

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 The JT65A frequency 40meters (USA) is 7076.0 kHz USB VFO. 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: 73 Bill G4WJS.ДЇrom: On Behalf Of g4wjs Sent: Wednesday, Aug10:42 AM To: Subject: Re: FT8 frequenciesJT65A is suitable for use in the 500Hz Bandwidth segments of ham radio bandplans. We cannot expect to expand precious spectrum regardless of other users without due consideration. Putting FT8 above JT9 lands it in a popular and heavily used RTTY sub-band and increasing activity would only expand further up while leaving the JT65 sub-band under utilized. Putting FT8 in a 2 kHz sub-band below JT65 on many bands was deliberate and included the assumption that many JT65 users looking for faster QSOs with strong signals would move to FT8, this naturally allows FT8 usage to expand upwards as JT65 usage reduces. Just because you think they are wrong does not make your choices correct, nor can I find any contribution from yourself on the discussion threads about the proposed allocations for FT8 than ran for a couple of weeks before the WSJT-X RC1 beta release on the wsjt-devel SourceForge list or wsjtgroup Yahoo Groups support list. The frequencies proposed for the up coming v1.8.0 release (now in beta test) have been decided upon after consultation, review of other mode usage and band plans. It was posted to a non-official web site which we do not control. Hi Bob, the information you posted was from a pre-release alpha test version of WSJT-X only available to those who build WSJT-X from sources and came with a strict reminder that those doing so should follow the wsjt-devel traffic and and change history for updates.

Jt65 frequency