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Adding PTT to Main Board

Tom - AJ8X All Messages By This Member #33694 I put a jumper on the V12 Main board to add PTT to the microphone jack. I'm finding it handy.
K9HZ All Messages By This Member #33695 开云体育 It works but there is a problem with that.? It means the digital and audio grounds are now the same. ? ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of Tom - AJ8X via groups.io Sent: Saturday, April 26, 2025 10:20 PM To: [email protected] Subject: [SoftwareControlledHamRadio] Adding PTT to Main Board ? I put a jumper on the V12 Main board to add PTT to the microphone jack. I'm finding it handy.
John G0SDF All Messages By This Member #33696 That's strange! I did the opposite! PTT in was tracked to J16 Mic_In - Ring and I cut the track. ? John, G0SDF
Tim All Messages By This Member #33697 Edited a bit strange, as Dr. Bill says they (PTT In Mic IN) should be isolated. When I had PTT In tied to Mic In going to TRS jack PTT did not work. After remembering Ver 10 and Dr. Bill,s hint I ran Mic and Mic Ground in a 2 conductor shielded cable Shield to Ground at front panel open on other end. Mic in and Mic Ground? were inside shield and attached directly to 2 pin header on Audio Shied. PTT In, Ground and Key A and B are now on 8 pin IDC going to ACC Jack on back of Main board.? I use a foot switch on PTT In, all rigs are setup this way old habit.? Tim W4YN

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