Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 25-10-2017, 14:35   #1
Registered User

Join Date: Nov 2012
Location: French Polynesia
Boat: Allied 39
Posts: 473
Icom M802 ADSP - add on noise reduction device

We are into our 13th year with our Icom M802 and previous to that had 2 Yaesu HAM radios.

Just curious if any of you are using a ADSP (Audi Digital Signal Processing) device that is suppose to help with background noise and static.
Noise Canceling Speakers

With the Yaesu there were a number of filters that could be adjusted to lower the noise and improve the hearing. The 802 has very limited filters available

We are heavy SSB/HAM users and are aware of all the various devices on board that can cause interference. But even though everything is turned off the noise is very high compared to other radios we have owned or radios we recently have used on other boats to run nets. The noise at times makes it very hard to hear people trying to check in. We sent the ICOM M802 back to be bench tested about 10 years ago and ICOM NA said everything is within specs.

Any actual users of the ADSP devices - would appreciate your comments

Thank you and safe sailing

Chuck
Jacaranda
Mo'orea, French Polynesia
__________________

__________________
www.jacarandajourney.com
chouliha is offline   Reply With Quote
Old 25-10-2017, 17:25   #2
Registered User

Join Date: Sep 2008
Location: Camden, ME
Boat: A Thistle and a Hallberg-Rassy 36
Posts: 666
Re: Icom M802 ADSP - add on noise reduction device

Audio DSP devices can improve the intelligibility of weak SSB signals somewhat, but definitely not a cure-all. If it allows you to adjust low and high frequency cuts, you may be able to tailor the sound better to your ear.
__________________

__________________
SoonerSailor is offline   Reply With Quote
Old 25-10-2017, 19:11   #3
Registered User

Join Date: Jan 2015
Location: Victoria BC
Boat: 1980 Hunter 36
Posts: 690
Re: Icom M802 ADSP - add on noise reduction device

https://www.bhi-ltd.com/noise-cancel...ers/dspkr.html

This one has a ton of good reviews from mobile hams. I'll probably pick it up one day
__________________
S/V Gudgeon
www.gudgeonblog.ca
alctel is offline   Reply With Quote
Old 25-10-2017, 22:13   #4
Registered User

Join Date: Nov 2012
Location: French Polynesia
Boat: Allied 39
Posts: 473
Re: Icom M802 ADSP - add on noise reduction device

Its also been suggested by some Hamsters to look at Clr speech speakers.

West Mountain Radio - CLRspkr ClearSpeech® DSP Noise Reduction Speaker

Any one used one of these speakers?

Thank You

Chuck
__________________
www.jacarandajourney.com
chouliha is offline   Reply With Quote
Old 26-10-2017, 10:06   #5
Registered User

Join Date: Aug 2017
Posts: 23
Re: Icom M802 ADSP - add on noise reduction device

You probably already know this, but just in case, be sure all LED lights are turned off.
Jon
KM4UJP
__________________
Gypsyjon is offline   Reply With Quote
Old 26-10-2017, 11:00   #6
Registered User

Join Date: Aug 2012
Location: On Boat in Mexico
Boat: Irwin, 43MKIII, 43
Posts: 77
Re: Icom M802 ADSP - add on noise reduction device

I use a CLRSpeach DSP speaker. It helps a lot. However, I am curious about your noise. With everything turned off, how many signal bars are shown on the M802 display?

One common installation error is connecting the M802 to the breaker panel instead of the battery directly. The battery is a giant filter as it likes DC and squashes noise signals.

Do you have a long run to the battery or are you using the supplied cable from Icom. If so, twisting the cable will help eliminate noise coming in through the power supply. I also recommend a mix 31 ferrite core at the back of the transceiver on the power supply line. If you use one built for RG8, you should be able to loop the DC wire at least 2 times through the snap on core. Make your loops equal and tight will result in the effect of having 4 single cores on the line.

If your noise is coming in through the antenna and everything is off, it is what it is. I would check for something that may be on all the time or possibly a ground loop. Your 12VDC should come to the radio. The ground on the control cable should be attached to the ground lug on the transceiver. The ground wire on the tuner end should be cut off and not connected. The only thing coming off the tuner lug should be your RF ground. The RF ground should not be connected to anything that is also connected to the -12V side of the battery e.g. engine, bonding etc.

Here is a link to a document I put together to help cruisers make sure they have a good installation: http://www.made-simplefor-cruisers.c...e%20M802-1.pdf

I hope that helps.
__________________

__________________
TLSparks is offline   Reply With Quote
Reply

Tags
icom, noise

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Icom M802 vs Icom 7300 BigAl.NZ Marine Electronics 1 13-03-2017 03:15
air cleaner or noise reduction for YSB8 Halifax Sailor Engines and Propulsion Systems 5 19-10-2016 17:25
Silent Running SR1000 for Noise Reduction JamuJoe Product or Service Reviews & Evaluations 0 03-02-2013 13:13
For Sale: ICOM M802 SSB, ICOM AT-140 Tuner, Pactor PTCIIpro with III Paul L Classifieds Archive 1 25-07-2012 19:34
ICOM M802 Self Install Kit... Radio University Marine Electronics 5 05-02-2007 05:51



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 21:08.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.