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Author Topic: No SWR metering on VHF  (Read 1899 times)
KK4IKO
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Posts: 67




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« on: October 20, 2012, 02:13:10 PM »

I was reading the manual for my IC 706MKIIG, and noticed it says there is no internal SWR metering when the VHF antenna connector is used.  Any particular reason for this?

I'm not having any problems, just wondering why that is.

Bruce, KK4IKO
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KM3F
Member

Posts: 501




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« Reply #1 on: October 20, 2012, 08:56:53 PM »

I can't speak for Icom but normally you use a beam that is tuned or a vertical/mobile ant. that is tuned.
With no tuner you would have to make adjustments then run to the radio to keep checking.
Better to get a low cost cross needle  meter for 144/440 to put in line and have SWR and power all in one, dedicated.
Then there is size and space needed to put in a second SWR sensor and or tuner.
Normally you don't use a tuner on vhf/uhf bands but match the antennas for each band.
I'm not a fan of the 706 on 2m or 70cm because the frequency stability on SSB is not good enough (IMO) for extended time use.
Good luck.
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KQ6Q
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Posts: 968




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« Reply #2 on: October 22, 2012, 11:25:40 PM »

The lack of SWR readout on VHF was likely a space compromise. My 746Pro has SWR sensing on 2m with a separate antenna jack - but the box is a lot bigger than a 706.
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WB2WIK
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Posts: 20565




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« Reply #3 on: October 27, 2012, 06:23:12 PM »

Adding SWR metering on VHF would add cost.  The rig is a compromise of performance vs. cost.
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