The Average JT65 QSO

I’ve recently branched out from my usual PSK31 operating and started with JT65. This is a mode that i’ve been meaning to get into for a while especially due to its effectiveness at very low power.

The first big change i noticed is that JT65 has a very structured QSO format certainly which certainly doesn’t make it a ragchew mode! This is quite different to PSK31 which is much more free form. Below i outline the sequence of a JT65 QSO:

  • CQ M0JCQ IO91
    • I send a CQ call along with my grid locator
  • M0JCQ ON5ABK JO10
    • He replies to my call with his grid locator
  • ON5ABK M0JCQ -06
    • I send his signal report (in dB)
  • M0JCQ ON5ABK R-13
    • He sends roger and my signal report (in dB)
  • ON5ABK M0JCQ RRR
    • I acknowledge receipt of his report
  • M0JCQ ON5ABK 73
    • He sends a standard or free form 73
  • TNX 73 GL
    • I send a freeform or standard 73 – contact is concluded

The free form text that is sent is limited to a maximum of 13 characters, so you can see this mode is most suited to rubber stamp QSoO’s but under marginal conditions it will work when other modes won’t.

The JT65-HF screenshot below shows a QSO i had with ON5ABK:

JT65 Decode Overview

This screenshot displays the view when we’re transmitting using JT65-HF:

jt65-transmit-overview

I hope this helps to explain the structure of a JT65 QSO, as i said before it’s not a chat mode but has a lot to offer the low power DX’er.

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