Wow.. Im sooo inspired... Perhaps I should add dial-pulse signalling to the app_rpt stuff. Can you imagine how interesting it would be on a mobile station in a fringe coverage area?? :-) Date: Fri, 10 May 2013 11:49:48 -1000 Subject: Re: [App_rpt-users] GM300 From: wb6egr@gmail.com To: bdboyle@bdboyle.com CC: telesistant@hotmail.com; app_rpt-users@ohnosec.org Be nice! One remote still has a tall green can in it (Automatic Electric) DIAL 4 for UHF please....... On Fri, May 10, 2013 at 11:44 AM, Bryan D. Boyle <bdboyle@bdboyle.com> wrote: or even electromechanical...:) Strowger switches arestill useful devices, even if outdated...;) --BryanSent from my iPhone 5...smallkeyboard, big fingers...pleaseforgive misspellings... On May 10, 2013, at 17:31, Jim Duuuude <telesistant@hotmail.com> wrote: Just a suggestion in general: We are ham radio operators. By definition, we have, at least, a certain basic knowledge of electronics (as is required to pass our test). If two devices are somehow electrically incompatible with each other, use your knowledge of electronics to build a simple circuit to interface them together. Converting from one set of "levels" to another is REALLY not that difficult. That's why we are what we are, and do what we do. Jim WB6NIL P.S. Or, you can use pin 8 *LIKE EVERY ONE ELSE DOES*!!
From: n5zua@earthlink.net To: app_rpt-users@ohnosec.org
Date: Fri, 10 May 2013 16:14:00 -0500 Subject: Re: [App_rpt-users] GM300
Gotcha. Not sure if you mentioned if yours was a 16 channel or not. If an 8 channel, the above link lists pin 4 as a spare, and instructs that pin 8 should be used for COR active low. Since you mentioned getting voltage out
of pin 4, I'm assuming yours is a 16 channel radio. Folks with an 8 channel model would not have the option you are using.
N5ZUA
----- Original Message ----- From: "Bill Hurlock" <bill.hurlock@cpcomms.com>
To: <app_rpt-users@ohnosec.org> Sent: Friday, May 10, 2013 3:54 PM Subject: Re: [App_rpt-users] App_rpt-users Digest, Vol 51, Issue 9
Here is a clip about PIN 4 in the Accessory plug of a GM300.
4 Programmable Output Only This is a radio output port. It is an open collector output which saturates to A+ supply when active. It is normally
used to drive an external relay or sense lead. It duplicates the function of J3-3 of the five pin logic board. When active it can source a maximum current of 250 mA. The pin has a 10 K ohm resistor pull-down to ground on the logic board.
and uses a PNP transistor to switch it up to 12V. This pin does not work as an active low pin (i.e. pulling something to ground), only as an active high (that is dragging something up to +12v). If you want an active high
output to drive a reed relay which has the other side of the coil to ground, this is your pin (but don't forget to check that the backwards diode is present on the coil pins).
Bill Hurlock
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