Sun Coast Amateur <br>Radio Club Society - blog:2019-12-08https://scarcs.ca/2026-06-07T03:55:05+00:00FeedCreator 1.8js8call_now_faster2020-08-07T20:03:30+00:002020-08-07T20:03:30+00:002020-08-07T20:03:30+00:00https://scarcs.ca/blog/2019-12-08/js8call_now_fasterAnonymous
<h1 class="sectionedit1" id="js8call_now_faster_or_slower">JS8Call Now Faster (or Slower)</h1>
<div class="level1">
<p>
At the beginning of December, <a href="http://js8call.com/" class="urlextern" title="http://js8call.com/" rel="ugc nofollow">JS8Call</a> released their version 2.0, adding two faster transmission speeds (<em>Fast</em> and <em>Turbo</em>). This week, 2.1 was released, adding a <em>Slow</em> speed that can work in even weaker SNR conditions.
</p>
<div class="table sectionedit2"><table class="inline">
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<tr class="row0">
<th class="col0 leftalign">Mode </th><th class="col1">Bandwidth </th><th class="col2 leftalign">Speed </th><th class="col3 leftalign">Frame Length </th><th class="col4">Mininum SNR </th>
</tr>
</thead>
<tr class="row1">
<td class="col0 leftalign">Slow </td><td class="col1 leftalign">25 <abbr title="Hertz">Hz</abbr> </td><td class="col2 leftalign">8 WPM </td><td class="col3 leftalign">30 seconds </td><td class="col4">-28 dB </td>
</tr>
<tr class="row2">
<td class="col0">Normal </td><td class="col1 leftalign">50 <abbr title="Hertz">Hz</abbr> </td><td class="col2">16 WPM </td><td class="col3 leftalign">15 seconds </td><td class="col4">-24 dB </td>
</tr>
<tr class="row3">
<td class="col0 leftalign">Fast </td><td class="col1 leftalign">80 <abbr title="Hertz">Hz</abbr> </td><td class="col2">24 WPM </td><td class="col3 leftalign">10 seconds </td><td class="col4">-20 dB </td>
</tr>
<tr class="row4">
<td class="col0 leftalign">Turbo </td><td class="col1 leftalign">160 <abbr title="Hertz">Hz</abbr> </td><td class="col2">40 WPM </td><td class="col3 leftalign">6 seconds </td><td class="col4">-18 dB </td>
</tr>
</table></div>
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<p>
The new MULTI decoder can decode all four speeds at once.
</p>
<p>
A few weeks ago, I gave it a quick spin and got copied on “Turbo” by a station near Boston at -13 dB on 80 m (at 22:30).
</p>
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