Hello KC2.....getting the noise irregardless of the distance between the computer and radio....currently have 3 desktops and 1 laptop....all are generating the +9 to +10db noise

Hey guys, thanks for the continued response...Just an update here....I have now tried 4 different computers [1 laptop] and the computers were connected this time at a distance of only 6-10 foot of usb cable.....[not the 40 foot run like the first time]...no change whatsoever....noise is still being generated at +9-10db min mostly 40 -80 meters....I guess I need to try ferrite cores [not sure even where they go] and grounding the usb shield....thanks again.....this is a crazy age for rfi now that computers and switching ps's are everywhere....

thank you for that quick, informative response....hopefully I won't get too winded here, but 3 years ago a multiplexer which was part of my security system was polluting my entire property with a very loud hash noise...+40db...wiped out everything, all bands,.....once that was removed from the system, all that knocking hash disappeared....still in the system though was, [lacking a better word] a 5-7 db of a swirling noise.....tried a best selling AC in-line suppressor which reduced the noise about 3 db, but still there [+4 db]..[probably whatever the local cable company was/is using to provide internet access is causing that problem because the power company was here and cleared themselves...lol..

Finally I switched to battery power [off the grid completely]....noise was virtually eliminated .. maybe .5 to 1 db atmospheric [these readings were all in the yard or in an extension room out back]....but whenever I take these radio's into a room upstairs [on battery power], whether a computer is in the room or not, certain sections of the rooms generate some heavy noise....20-30 db mainly 40 and 80m......

So what I did was I took the Icom to the noise free room in the back of the house.....I then ran a 30 foot USB extension cable to the computer upstairs.....without the usb cable even plugged in to the computer, immediately plugging the usb cable into the rig brings the noise back to +10db......the guy at Icom said the 30 foot long usb cable was probably picking up noise acting like an antenna....all that being said, will your suggestion of clamp-on ferrite cores for RFI suppression do the trick?....if so can you be specific on model numbers and actual placement of these things...sorry to say I have NO experience with the cores, which you are probably already aware of.....

thanks so much!

After finally curing severe noise problems on the grid...[the cable company is causing that problem still]...[cured that problem  by using just battery power], I've recently ran into another problem...Controlling my ICOM 7200 from the usb port brings the noise level up from s3 to about +20 on 80 and 40 meters...does anyone know if there is a cure for this?...eg; rf chokes...many thanks in advance

Anyone know of a source for remote control software in Windows 7 [64 bit] for AOR 8600 receiver?

I'm grounding my 55ft US Tower...I have 3 legs going to ground rods....What width copper strap should be used?..I was going to use 2 or 3 inches......also, is .032 too thick?...if so, what is recommended?...thanks in advance guys!...Happy Thanksgiving to all!

great read N3OX..thanks..

I'll try that Rob, I know too narrowing of the filter makes it worse...

just wish I could ged rid of that high pitched hiss and noise and stuff ...lol

have a great Father's Day guys!

73, WA3YCW out!

thanks for that info Dan....greatly appreciated....

I have a theory on these DSP receivers but maybe I'm wrong...I've been in since '76'..started with the old tube radios which seemed to have a much sweeter pleasing sound to the ears....I'm 48 and my hearing is good, but not sure if you ever heard the Icom 7200...I'm not bashing the company, I know hear they make great radios. But the contrast between the AOR and the 7200 is unbelievable...sorry for repeating it, but I can't even listen to the 7200....It just 'tires' me out immediately....Maybe all these fancier DSP radios sound like that....I guess thats the price to pay to reduce adjacent interference, I don't know...What I do know is the AOR is sweet...When I first got it, I was extremely disappointed...It was too quiet...It wasn't until I added one of those miracle antenna tuners then it came to life...oh well, sorry for the winded rambling post....

thanks again!

thanks boss...thanks for all your help....

I actually thought about that frequently over the past few months........That is probably the route I will take...I was just afraid of overloading the AOR receiver...

How does the T-R switch work?.....Never done that before, other than 30 years ago with seperate xmit and rec units and a big manual switch...[CW only]

I noticed the frequency readouts are not in synch ....how does one "spot"?

sorry for my stupidity...been out awhile....

even with the T-R switch, if the receiver is sitting directly atop the Icom, won't it still get overloaded somehow?

thanks for taking interest and the time to respond...very much appreciated...

lol....ok, my bad....was hoping to find something for about 3,000.00 USD

thanks for that though!

I have an AOR AR8600 'scanner' that I use to listen to HF....

The receiver is incredibly quiet and allows for unbelievable distant station reception...adding to that, the audio is  very rich, clean sounding even though the unit is built for mobile use. I have been using it for years. It is just amazing.

I recently bought the Icom 7200....The receiver [relative to the AOR] is extremely noisy and annoying to the ear...even after all filter and DSP adjustments....I can't listen for more than 1 minute without becoming fatigued [ even when using a large external speaker from SweetSound].......It can't even pick up some of the stations the AOR does when side by side.

Can someone direct me to a HF transceiver that has a very sensitive but 'quiet' sounding receiver?

thanks in advance

thanks guys!...the design I am using is for a 20m yagi [five-element 48 foot boom] taken from the ARRL antenna book....They seem to infer ALL elements are open in the center although the only diagram shown is for the driven element....Although other antenna design books I have read [with regard to other yagi's] have each reflector and director elements closed in the center. [ I'm assuming that is almost the standard]

OK, so the tapered driven element is open in the center and insulated from the boom...

What about the tapered reflector and directors?...I believe they are closed,??....and are they shorted to the boom or insulated from it???

thanks in advance! [as always]

WOW!...I never really thought about that....when I get to that bridge, I'll cross it...

no, actually I was hoping the wife would hold it up....out on a ledge, during a thunderstorm...

truthfully, I have a US Tower HDX55 [5]?...

it's supposed to be good for 450 pounds...

going to hold off on that 40m addition...I'll see what happens with 20m....if I live that long afterwards...