Modifications for the ICOM - RogerK

2. After about 0.5 second, press start switch for a moment. ( use momentary contact switch )3. LED start blinking , which indicate tuning is in process.4. After about 3 seconds or so, LED shut off, and tuning is completed,If tuning is successful SWR should be less than 1.2Some radio start to reduce the power when SWR is high, this tuner takes at least 10 watts of power for tuner to work properly.Most of the 100 watts radio should not have any problem, since they still put out 10 watts or so, even with high SWR.But, it does not work with some QRP radio ( 5 watts or less ).Adjust power level, if necessary.You may extend control cable to 100 feet , it still work fine, you can put this tuner on top of tower.Let me know , how it workedaa7ol@hotmail.com.MODIFICATION.NETThis modification is read 1503 times.top of page07-06-2001(AT-160) Using the AT-160 with the IC-706MKIIAuthor: Dave Abshire Sr. - KG4KOX - KG4KOX@aol.com.MODIFICATION.NETICOM's IC-706MKII transceiver and AT-180 antenna tuner are designed to work together. However, ICOM's AT-160 is a verypopular antenna tuner. Originally designed to work with the IC-728 and IC-729 transceivers (now out of production), the AT-160will work with the IC-706MKII if the following instructions are followed:1. (IC-706MKII only, not IC-706) The IC-706MKII will transmit on VHF constantly when connected to the AT-160. To stop this,remove the wire attached to pin 6 of the DIN connector within the OPC-104 cable.2. Open the AT-160 and make sure the switch labelled "S1" on the circuit board is switched to the bottom, shown as "IC-725/726" in the AT-160 instructions.3. Make sure that the connections to the AT-160, using the OPC-319, OPC-104, or OPC-125C cables, are according to the AT-160 instruction manual. ICOM America suggests using the OPC-599 adapter cable for connection of the OPC-104 to the IC-706MKII.4. Connect the radio to the transmitter terminal and connect an antenna to the ANT terminal. Make sure the antenna has lessthan a 3:1 SWR. Place the radio in FM, AM or RTTY mode and key the mic. The AT-160 will now tune properly.5. The tuning button on the front of the IC-706MKII will not operate when using the AT-160 antenna tuner. This feature wasdesigned to work with the AT-180.6. Check the SWR presented to the radio. It should be less than 1.5:1. The AT-160 operates with the IC-706MKII as it wouldwith the IC-725 or 726 transceivers. Included with the AT-160 instructions is a page dedicated to the antenna tuner'soperation with an IC-725 and IC-726 transceiver. This is not the way the AT-160 operates with the IC-706MKII.7. There is no way to turn the AT-160 off or place it into "thru" mode when operating with the IC-706MKII.