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- IC2AT.4
-
- Connecting Icom 2AT to packet. Jim Gerritz WA4FMA
- =================================================
-
- The Icom 2at HT is an excellent little rig to operate packet. It features usual
- fast electronic switching between transmit and recieve as well as a reciever
- that comes back imediatly after a transmission without delay. A slow recovering
- reciever can be a real hinderince to packet operation. The best feature is that
- the Icom 2at is one of the most ecmonimical fully synthesized of the HT on the
- market today. Like many of us, it is my only full coverage 2mtr rig. Following
- it with the Heath 15 watt amp gives it the power of many larger radios. A must
- for packet.
- The only problem is that it has no seperate PTT line. Any time the resitance of
- the center pin of the outboard mike jack is lowered, the transmitter keys. This
- is the difficulty with packet. What follows is a simple schematic showing how
- to connect the 2at to the TNC ustilizing a simple inexpensive audio output
- transformer.
-
-
-
- . --------) (---------- (To Center pin of
- . ) ( Icom mike jack)
- . 600 ohm ) ( 8 ohm
- . To TNC out ) ( To Icom 2at mike jack
- . ) (
- . --------) (--------- (To PTT line of TNC)
-
-
- If there is a center tap on the transformer, this may be clipped off as it is
- not used in this application. The speaker jack of the Icom 2at is connected as
- per instructions provided with the TNC.
- For best results, I have found that if the volume control of the HT is between
- the 9 and 11 O'clock positions, good copy should result. I am using the MFJ
- 1270 TNC.
-
- 73 and Happy packeting!
- .......................
- Downloaded from packet BBS.
-
- Call the HAM HOTLINE in Boston (voice) 617-437-0111
- the ARRL Eastern Mass Public Information Office
- Downloaded From P-80 International Information Systems 304-744-2253
-