Icom 706 Troubleshooting
#1
JK Enthusiast
Thread Starter
Icom 706 Troubleshooting
Anyone familiar with the older 706? Works fine on 2m, receives HF but will not transmit in SSB mode. The radio keys (you can hear the fan speed drop) but does not show output on the power meter. Switch to FM and key - it shows output on the power meter. The radio is new to me so I'm hoping it's something simple/stupid. Any ideas?
#2
JK Freak
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What happens on SSB when you key and give a loud "Auuuuuuuuudio" in the mic ??
Not trying to be a smart arse but, it won't show anything on SSB if your just dead keying...Again, not trying to be a wise guy just don't know what your experience is..
Not trying to be a smart arse but, it won't show anything on SSB if your just dead keying...Again, not trying to be a wise guy just don't know what your experience is..
#3
JK Enthusiast
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Actually you're dead on. Went to a club meeting last night and got with the guy that sold me the 706. Cranked the mic gain up and - it seemed to be getting out fine. At least the power meter was registering. I wasn't dead keying but I didn't realize that voice input levels which work fine on 2m FM might not be enough for HF SSB. I'm learning
#4
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Actually you're dead on. Went to a club meeting last night and got with the guy that sold me the 706. Cranked the mic gain up and - it seemed to be getting out fine. At least the power meter was registering. I wasn't dead keying but I didn't realize that voice input levels which work fine on 2m FM might not be enough for HF SSB. I'm learning
#5
JK Jedi
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Have Fun...
Last edited by AK4Dave; 04-10-2009 at 10:14 AM.
#6
JK Enthusiast
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It was a combination of mic gain, ALC, comp gain (tiny set screw adjustment on the side of the case), and engaging the compression function (didn't know about that one). Basically I had to tweak the radio to my voice plus use COMP when working DX contacts. Got through to Buenos Aires, Victoria BC, and Nova Scotia late this afternoon on 20m. Not bad for a 100w mobile rig using a hamstick antenna sitting in my driveway!
Every time I read through the manual on the 706 I find something else I missed
Every time I read through the manual on the 706 I find something else I missed
#7
JK Jedi
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It was a combination of mic gain, ALC, comp gain (tiny set screw adjustment on the side of the case), and engaging the compression function (didn't know about that one). Basically I had to tweak the radio to my voice plus use COMP when working DX contacts. Got through to Buenos Aires, Victoria BC, and Nova Scotia late this afternoon on 20m. Not bad for a 100w mobile rig using a hamstick antenna sitting in my driveway!
Every time I read through the manual on the 706 I find something else I missed
Every time I read through the manual on the 706 I find something else I missed
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#8
JK Freak
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It was a combination of mic gain, ALC, comp gain (tiny set screw adjustment on the side of the case), and engaging the compression function (didn't know about that one). Basically I had to tweak the radio to my voice plus use COMP when working DX contacts. Got through to Buenos Aires, Victoria BC, and Nova Scotia late this afternoon on 20m. Not bad for a 100w mobile rig using a hamstick antenna sitting in my driveway!
Every time I read through the manual on the 706 I find something else I missed
Every time I read through the manual on the 706 I find something else I missed
#9
JK Enthusiast
Thread Starter
Well, apparently I had a mic going bad and didn't know it. Lost all audio which manifested itself as extremely low power output on HF and even though the 706 would hit the repeater on VHF it was carrier only, no audio. A friend with far more experience than I have suggested that I had more problems than just the mic (which we confirmed by swapping one off one of his radios) so I sent it off to Icom. The tech confirmed the mic was beyond repair but couldn't find anything else wrong with the radio (so much for our troubleshooting). Rather than pay for the diagnostic time of 1/2 hour, I'm paying for an hour in return for adjusting the outputs etc etc.
Meanwhile I found a deal on a 706 MKIIG so now I have to decide between selling the older, factory overhauled 706 or installing it in my CJ (the wife will never look there)!
Meanwhile I found a deal on a 706 MKIIG so now I have to decide between selling the older, factory overhauled 706 or installing it in my CJ (the wife will never look there)!