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<pre>Tnx Kjell,<br><br>I scoured through my parts box from Mouser and Digikey and<br>finally found the LT3680 chip.<br><br>I appreciate your help.<br><br>73,<br><br>Rick / N1GP<br><b><br>====<br><br>Kjell Karlsen</b>
<a href="mailto:hpsdr%40lists.openhpsdr.org?Subject=Re%3A%20%5Bhpsdr%5D%20Bulding%20Hermes%2C%20U58%20Question&In-Reply-To=%3Cop.wtuuz1zhnknqug%40kjell-pc.lan%3E" title="[hpsdr] Bulding Hermes, U58 Question">la2ni at online.no
</a><br>
<i>Tue Mar 12 15:49:02 PDT 2013</i><br><br>Hi Rick.
U58 is the switch mode controller, PN:LT3658 from Linear Technology.
Unfortunately the BOM has the old Ref.des on it namely U24 (Digikey PN:
LT3680EMSE#PBF-ND) item nr. 122.
Good luck with your Hermes build!
73, Kjell
</pre><br><br><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">From: n1wwq@hotmail.com<br>To: hpsdr@lists.openhpsdr.org<br>Subject: Bulding Hermes, U58 Question<br>Date: Tue, 12 Mar 2013 18:30:08 -0400<br><br>
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Hi Folks,<br><br>Can't find U58, LTCYM.<br><br>In the beginning phase of building my Hermes, getting the parts together.<br><br>In trying to get all the ground plane chips done up first I notice that there is a<br>U58 on the top board, close to the regulators (left) and L28. It has the component<br>ID of LTCYM and seems to be a voltage regulator.<br><br>I can find no mention of U58 in the BOM, (1010_HERMES_PROD_BOM_08112012.xls)<br>not any mention of an LTCYM.<br><br>If I am looking at this incorrectly, please advise me of what the right BOM designation is.<br>I know I didn't order one since it wasn't on the BOM unless it was listed under a different part<br>number?<br><br>Tnx much,<br><br>Rick / N1GP<br><br> </div></div> </div></body>
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