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<p>Hi Dave</p>
<p>I have written a short generic article on grid block keying on my
technical web site below if that might be of some assistance.</p>
<p>Look in the Valve Circuits Menu section.</p>
<p>I have used this tehnique with an SB-301/401 combo to achieve
full break-in.<br>
</p>
<pre class="moz-signature" cols="72">73
Bob
Bob F Burns G3OOU, G-QRP 6907, @BobFBurns
Crystal Palace Radio & Electronics Club: <a class="moz-txt-link-freetext" href="https://www.cprec.org/">https://www.cprec.org/</a>
Admin/sales site: <a class="moz-txt-link-freetext" href="http://www.g3oou.co.uk/">http://www.g3oou.co.uk/</a>
Technical site: <a class="moz-txt-link-abbreviated" href="http://www.qsl.net/g3oou">www.qsl.net/g3oou</a></pre>
<div class="moz-cite-prefix">On 16/11/2024 18:06, David Thorne
wrote:<br>
</div>
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<p dir="LTR"><span lang="en-us"><font face="Aptos">I inherited a
Cheyenne MT-1 transmitter</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"><font face="Aptos">
from a friend</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"><font face="Aptos">,
now deceased</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"><font face="Aptos">.</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"><font face="Aptos"> We each built our own</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"> <font face="Aptos">MT-1/MR-1 combos in high
school</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"><font face="Aptos">
around 1960</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"><font face="Aptos">.</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"> <font face="Aptos">A bit later m</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"><font face="Aptos">y friend</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"> <font face="Aptos">added</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"><font face="Aptos"> a m</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"><font face="Aptos">odification on the 6146 final
that looks like a change to grid-block keying.</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"> <font face="Aptos">It would be possible of
course, but tedious, to</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"> <font face="Aptos">figure
out visually</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"><font face="Aptos">
what was changed/added</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"><font face="Aptos">.</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"> <font face="Aptos">I
know this is a longshot, but d</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"><font face="Aptos">oes anyone have any
information/schematics that might have</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"> <font face="Aptos">been used to make this
modification</font></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"><font face="Aptos">?</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Aptos">Thanks,</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Aptos">Dave</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Aptos">K7KTB</font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"><font face="Aptos"> </font></span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"> </span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"> </span><span
lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"> </span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"> </span></p>
<br>
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<pre wrap="" class="moz-quote-pre">_______________________________________________
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</pre>
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