[ICOM] IC-718 Speech Processor Adjustment

Thomas Giella KN4LF flcyclone at tampabay.rr.com
Tue Oct 31 15:49:39 EST 2006


To All That Responded To My Post,

Please go back and read my email post as it says,

"This morning I began experimenting with the rig on "SSB" and was told 
several times that the transmit audio had a harsh and over driven sound with 
the speech processor on".

It amazes me that so many people could misread my post. Of course I would 
not run speech processing on the digital modes.

It also appears that some don't understand the concept that a "properly" 
adjusted RF speech processing level will increase average talk power and 
allow a successful QSO to be completed under marginal conditions, while at 
the same time allowing for a good audio report.

Many hams have a poor opinion of speech processing much like vertical 
antennas but it's urban legend stuff. If either are not set up correctly 
they will not work correctly.

Unfortunately the IC-718 has a fixed processing level of approximately 12 db 
which is to high, so the bad audio reports on SSB came with the mic gain set 
low at 30 on a scale of 00-100, with virtually no ALC movement.

--... ...--,
Thomas F. Giella, KN4LF
Lakeland, FL, USA
Grid Square EL97AW
kn4lf at arrl.net

KN4LF Amateur & SWL Radio History: http://www.kn4lf.com
Radiowave Propagation Yahoo eGroup: 
http://groups.yahoo.com/group/radiowavepropagation
New Scientific Evidence for the Existence of God: 
http://www.cosmicfingerprints.com/audio/newevidence.htm

----- Original Message ----- 
From: Thomas Giella KN4LF
To: a Icom eList
Sent: Monday, October 30, 2006 10:41 AM
Subject: IC-718 Speech Processor


Last year I purchased a new IC-718 for digital modes only operation. This
morning I began experimenting with the rig on SSB and was told several times
that the transmit audio had a harsh and over driven sound with the speech
processor on. Unfortunately the processor level can't be adjusted on the
outside of the rig.

Has anybody popped the covers and made an adjustment to the speech
processing? If so can you tell where the adjustment pot is? I have the
schematics but have some vision issues and can't locate the adjustment on
it.

--... ...--,
Thomas F. Giella, KN4LF
Lakeland, FL, USA
Grid Square EL97AW
kn4lf at arrl.net

KN4LF Amateur & SWL Radio History: http://www.kn4lf.com
Radiowave Propagation Yahoo eGroup:
http://groups.yahoo.com/group/radiowavepropagation
New Scientific Evidence for the Existence of God:
http://www.cosmicfingerprints.com/audio/newevidence.htm 



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