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<p class="MsoNormal"><span style="color:black">So stock SB-220 and SB-200 use 120VDC relay. When you ground the center pin of the T/R RLY jack, that completes the ground return for the relay. Solid state radios must have a isolation relay or these amps will
blow them up. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">All the SB-104 needs to do is have a set of contacts to close the loop.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Hope this helps,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">K7BIT<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">J<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Heath <heath-bounces@puck.nether.net> <b>On Behalf Of
</b>A Lawrence Fibich<br>
<b>Sent:</b> Sunday, June 17, 2018 8:48 PM<br>
<b>To:</b> heath@puck.nether.net<br>
<b>Subject:</b> [Heath] Trying to connect a SB 104 to a SB 200 -- need help/information<o:p></o:p></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black">Trying to connect the SB 104 to drive the SB 200 --- earlier told connect to pins 8 (relay) and pin 9 (ground) to go to turn on the
SB 200. But in looking at the schematic and wiring diagram for the Heathkit power supply HP-1144 this isn't right-- e.g. pin 7 (GRN), 8 (BLU), 9 (VIOL), 10 (no wire) are all tied together - and schematic for the power supply give no indication how it would
work if even I separated the wires/connections.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black">? Anyone have a helpful clue-- interesting - like ALL other Heathkit transceivers give instructions on connecting the SB 200 -- ??
not this unit ??<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black">Thank you ALL in advance for all your helpfulness...<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black">Larry Fibich<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black">AF6LF<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black">Sacramento <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:18.0pt;font-family:"Bookman Old Style",serif;color:black">(916) 966-0266 (h)<o:p></o:p></span></p>
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