<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>or even electromechanical...:) Strowger switches arestill useful devices, even if outdated...;)<br><br>--<div>Bryan</div><div>Sent from my iPhone 5...small</div><div>keyboard, big fingers...please</div><div>forgive misspellings...</div><div><br><div><br></div></div></div><div><br>On May 10, 2013, at 17:31, Jim Duuuude <<a href="mailto:telesistant@hotmail.com">telesistant@hotmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style>
<div dir="ltr">Just a suggestion in general:<br><br>We are ham radio operators. By definition, we have, at least, a certain basic knowledge of<br>electronics (as is required to pass our test).<br><br>If two devices are somehow electrically incompatible with each other, use your knowledge of<br>electronics to build a simple circuit to interface them together. Converting from one set of<br>"levels" to another is REALLY not that difficult.<br><br>That's why we are what we are, and do what we do.<br><br>Jim WB6NIL<br><br>P.S. Or, you can use pin 8 *LIKE EVERY ONE ELSE DOES*!! <br><br><br><br><div><div id="SkyDrivePlaceholder"></div>> From: <a href="mailto:n5zua@earthlink.net">n5zua@earthlink.net</a><br>> To: <a href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</a><br>> Date: Fri, 10 May 2013 16:14:00 -0500<br>> Subject: Re: [App_rpt-users] GM300<br>> <br>> <<a href="http://www.batlabs.com/images/gmacc8.gif">http://www.batlabs.com/images/gmacc8.gif</a>><br>> <br>> Gotcha. Not sure if you mentioned if yours was a 16 channel or not. If an 8 <br>> channel, the above link lists pin 4 as a spare, and instructs that pin 8 <br>> should be used for COR active low. Since you mentioned getting voltage out <br>> of pin 4, I'm assuming yours is a 16 channel radio. Folks with an 8 channel <br>> model would not have the option you are using.<br>> <br>> N5ZUA<br>> <br>> ----- Original Message ----- <br>> From: "Bill Hurlock" <<a href="mailto:bill.hurlock@cpcomms.com">bill.hurlock@cpcomms.com</a>><br>> To: <<a href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</a>><br>> Sent: Friday, May 10, 2013 3:54 PM<br>> Subject: Re: [App_rpt-users] App_rpt-users Digest, Vol 51, Issue 9<br>> <br>> <br>> > Here is a clip about PIN 4 in the Accessory plug of a GM300.<br>> ><br>> > 4 Programmable Output Only This is a radio output port. It is an open <br>> > collector output which saturates to A+ supply when active. It is normally <br>> > used to drive an external relay or sense lead. It duplicates the function <br>> > of J3-3 of the five pin logic board. When active it can source a maximum <br>> > current of 250 mA.<br>> > The pin has a 10 K ohm resistor pull-down to ground on the logic board. <br>> > and uses a PNP transistor to switch it up to 12V. This pin does not work <br>> > as an active low pin (i.e. pulling something to ground), only as an active <br>> > high (that is dragging something up to +12v). If you want an active high <br>> > output to drive a reed relay which has the other side of the coil to <br>> > ground, this is your pin (but don't forget to check that the backwards <br>> > diode is present on the coil pins).<br>> ><br>> > Bill Hurlock<br>> <br>> _______________________________________________<br>> App_rpt-users mailing list<br>> <a href="mailto:App_rpt-users@ohnosec.org">App_rpt-users@ohnosec.org</a><br>> <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br></div> </div>
</div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>App_rpt-users mailing list</span><br><span><a href="mailto:App_rpt-users@ohnosec.org">App_rpt-users@ohnosec.org</a></span><br><span><a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a></span><br></div></blockquote></body></html>