<div>I don't know about Orbit radios, but Proline had a small circuit board between the battery cells. The diodes were conventionally mounted to the board, and wires went from the board to the cells.</div> <div> </div> <div>I may still have an old one floating around in the bowels of my garage somewhere...</div> <div> </div> <div>Bob R.</div> <div><BR><BR><B><I>Ed Alt <ed_alt@hotmail.com></I></B> wrote:</div> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> <META content="MSHTML 6.00.2900.2802" name=GENERATOR> <DIV><FONT face=Arial size=2>I could be wrong, but I think they may have been using germanium diodes back then to get the lowest possible junction drop. You've got to weigh the benefit of messing with all those solder joints, heating the cells etc against maybe just going with a redundant pack. Plus you have to be pretty careful about routing the diode leads and bodies to avoid shorts
and possibly having the thing wear against the insulating wrap on the cells. You can get the weights right with smaller packs etc. and just do two to get your reliability up.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Ed</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV>----- Original Message ----- </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=bob@toprudder.com href="mailto:bob@toprudder.com">Bob Richards</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 24, 2006 1:42 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] NiMH
Question</DIV> <DIV><BR></DIV> <DIV>The diodes they used back then probably would not work as well in a modern system, since we have much more of a current drain with today's servos.</DIV> <DIV> </DIV> <DIV>I would suspect any good rectifier rated for the expected current would work.</DIV> <DIV> </DIV> <DIV>Bob R.</DIV> <DIV><BR><BR><B><I>Wayne Galligan <<A href="mailto:wgalligan@goodsonacura.com">wgalligan@goodsonacura.com</A>></I></B> wrote:</DIV> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> <META content="MSHTML 6.00.2800.1400" name=GENERATOR> <STYLE></STYLE> <DIV><FONT face=Arial size=2>What type of diode and would these be available from Radio Shack?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>WG</FONT></DIV> <DIV> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid;
MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </D! IV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=bob@toprudder.com href="mailto:bob@toprudder.com">Bob Richards</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 24, 2006 10:38 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] NiMH Question</DIV> <DIV><BR></DIV> <DIV>>>>NiCad's normally fail shorted and you have enough power to land. NiMh's normally fail open and you will need another airplane to go with your new battery.<<<</DIV> <DIV> </DIV> <DIV>Some of the old radios (Proline, for instance) had diodes across each cell in the airborne pack, in case a cell went open. Also, if a cell died (lost voltage) it would
minimize the problem by preventing a cell from reverse charging.</DIV> <DIV> <HR> <DIV></DIV>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</DIV></DIV></BLOCKQUOTE>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</BLOCKQUOTE><BR> <div> <HR> <div></div>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</BLOCKQUOTE>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</BLOCKQUOTE><BR>