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Author Topic: icom-718 power output  (Read 928 times)
K1JK
Member

Posts: 207




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« on: August 23, 2009, 12:14:11 PM »

Hi guys
what i got is 718 to mfj-993b tuner to 80m loop
feed with 20ft 450ohm ladder line. on 2nd floor
and gound 25ft to 4ft ground rod.
i have made contact all over and gotten good
reports
PROBLEM--tuner tunes all bands 1.1 to 1.4 on
tuner meter//on 718 it shows higher 1.5 to 2.2
power output on 718 set to high//meter on tuner
says 30-40watts with .2 to .4 ref power when talking ssb//when i whisle into mic tuner meter goes to 96-98watts output//am power output33-37watts
is this common in ssb mode or should i be seeing
90-100watts when talking?
my 1st hf rig set up//
thanks
KB1SQG
jeff k
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K1JK
Member

Posts: 207




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« Reply #1 on: August 23, 2009, 01:02:37 PM »

KB1SQG
ALSO MY RIG AND TUNER ARE ALL GROUND TO
10GA WIRE GOING TO GROUND ROD
JEFF K
THANKS FOR ANY HELP
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WB5JEO
Member

Posts: 805




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« Reply #2 on: August 24, 2009, 08:48:27 AM »

RF power meters with no special provision for reading peak power typically indicate something like 1/10th to 1/5th on SSB of what you have indicated with a carrier (or a whistle, if you can manage a constant whistle). The higher indications during SSB speech would be with a processor in use. So it sounds like you're seeing about what we would expect, and everything is working properly. Some meters have a PEP switch position, but they're mostly not terribly accurate. Don't worry about trying to read reflected during speech. If you want to watch something during speech, watch the ALC indicator and keep it within proper range for best speech quality.
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K1JK
Member

Posts: 207




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« Reply #3 on: August 24, 2009, 12:41:30 PM »

thanks for reply
jeff k
new to hf ssb
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