[ICOM] IC-718 antenna tuning and SWR

[Hal WD4MDA]

Patrick,
The other posts are correct on the cw key, it will engage the reading on 
your swr meter.

I use an Icom 746Pro but it all should be the same.
I can tune in Rtty,CW(with key pressed down) or Fm( with foot switch 
engaged).

  I use Fm all the time to check swr's when tuning antenna's and when tuning 
the Amplifier. I am not sure if you have fm on that rig or not.

But rtty will give you a correct reading.  Cw will give you a correct 
reading with an attached key pressed to engage the 718 to transmit.

Hope this gives you some options.  By the way the microphone probably acts 
like a cw key.

Hang in there you will get it.

73,
Harold "Hal"  Stang / WD4MDA
wd4mda at comcast.net
wd4mda at yahoo.com
Yahoo IM @ wd4mda
Field Hell - #2599
30mdg - #3772

----- Original Message ----- 
From: <kb8rtz at oh.rr.com>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Thursday, June 24, 2010 9:53 PM
Subject: [ICOM] IC-718 antenna tuning and SWR


> Good evening,
>
> I have an IC-718 and am attempting to narrow an SWR issue with a new 
> Hustler 6BTV. The last few days have been frustrating to say the least. 
> The instructions in the Tx manual say to set the power above 30W, set the 
> operating mode to either CW or RTTY, set the display to show SWR; tune to 
> a frequency and push the PTT button. Realized that I didn't follow the PTT 
> instruction and have instead been pushing the DIT command on the 
> electronic microphone keyer to check SWR.
>
> Anyway, on 10m the SWR seemed just fine using the CW DIT command. On all 
> bands (10-15-20-40 check so far) while in CW mode and pushing PTT the SWR 
> reads 1:1 or less. While in RTTY mode the SWR on 10m slopes upward from 
> 1.75:1 at the low end to 2.5:1 at the high end. The SWR in CW mode and 
> pushing the DIT command the SWR was even higher.
>
> My questions are:
> Why when pushing PTT in CW mode there is no SWR reading?
> Why when pushing PTT in RTTY mode there is SWR?
> Why when pushing DIT command on the electronic microphone keyer there is 
> SWR?
> The last question comes from the manual stating to set to either CW or 
> RTTY then push PTT to read the SWR.
>
> Thanks much.
>
> 73...Patrick...KB8RTZ...
> ----
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