To:mbramwel@uwo.ca Date:Wed, 8 Nov 89 10:24:00 est Subject:packet mod for TM321 From:rfc@briar.philips.com (Robert Casey;6282;3.57;$0201) Date:5 Sep 89 14:37:21 GMT Sender:news@philabs.Philips.Com Msg# TSP Size #Rd Date/Time MsgID From To 2627 BF 1043 2 0904/0022 4650_WA2SNA WM8J ALL@ALLBBS Sb:TM231PACKETMOD THE FOLLOWING IS AN EASY MOD TO SQUELCH THE AUDIO AT MIC PIN 6 FOR TNC'S WITHOUT TRUE DCD: OBTAIN FROM KENWOOD A 2SD1757(K) (SURFACE MOUNT TRANSISTOR). INSTALL EMITTER TO MIC PIN 8, COLLECTOR TO MIC PIN 6, AND JUMPER FROM BASE TO THE UNUSED PIN ON CONNECTOR 202. USING THE UNUSED PIN RATHER THAN RUNNING THE JUMPER TO THE MOTHER BOARD PRESERVES THE PLUG IN FEATURE OF THE FRONT PANEL. CONNECT ONE END OF A 4.7 K RESISTOR (I USED A 6.8 K) TO THE MUTE LINE (IC 5 PIN 7), AND CONNECT THE OTHER END TO THE UNUSED PIN OF CONNECTOR 4, WHICH MATES WITH CONNECTOR 202. THIS NEW CIRCUIT IS A CLOSE COPY OF THE AF MUTE CIRCUIT THAT SQUELCHES THE RX AUDIO AT THE SPEAKER. IT WORKS PERFECT WITH MY PACCOMM MICROPOWER 2. THE HARDEST PART OF THE MOD IS REMOVING THE LOCKING RING AROUND THE MIC CONNECTOR. I USED A MODIFIED TABLE FORK! GOOD LUCK. 0241z, 939 msgs, #2643 last @KD6TH-4 MailBox> Note:I haven't tried this, proceed at your own risk! WA2ISE  Amsterdam View Our Stats   CLICK FOR A FREE DOMAIN NAMES HTTP://WWW.YOURNAME.TK FOR YOUR OWN WEBSITE IF YOU CLICK HERE AND YOU CAN VOTE FOR OUR FREE WEBSITES IN THE TOP 100 LIST  WANT A TOP RANKING ? USE THE ULTIMATE SOFTWARE SUITE FOR WEB SITE PROMOTION  FreeWebSubmissions Submit Your Site To The Web's Top 50 Search Engines For Free THE ALEXA BANNER, THIS BANNER GIVES THE DALLY STATISTICS OF THIS FREE WEB SITE The World of Free Packet Radio Software Amsterdam The World Of Free Packet Radio Software Amsterdam The Netherlands |