[ICOM] 17m and preamp question

[Phil Krichbaum]

    I've had overload problems with MKIIG on 6m from a CH 2 TX with 4MW 
ERP 6 miles airline. The TV audio would blow it away unless I turned in 
the attenuator.
    Phil

Stephen Budensiek wrote:
> John,
>    Don't know if it's fesible, but first think I'd try would be moving
> the end near the power lines to another location, even if it meant
> having it lower.   See if getting it away from the power lines brings
> the noise down any.   Reason I asked about the AM transmitter towers,
> the 706 is real bad about overloading when one is within 1/2 mile to a
> mile, if it's a 50kw station.   You might try a second antenna, maybe
> a 20m dipole, located as far from the power lines as possible.
> Problems I've encountered, if antenna is close to a house or barn, it
> will pick up florecent lights, electric fences, similar stuff real
> bad.
>
> 73's de Stephen, K0SD
>
> ***********************************
>
> On Tue, May 22, 2012 at 6:46 PM, John G. <af5cc at fidmail.com> wrote:
>   
>> Hi Steve,
>>
>> I am using a G5RV homebrew clone, about 30 feet high in the center.  Not
>> sure how close the closest broadcast transmitter is, but it isn't real
>> close, that I know.  Normal power lines run behind the property, close to
>> one end of the antenna.
>>
>> 73 John AF5CC
>>
>> ----- Original Message -----
>> From: "Stephen Budensiek" <kzerosd at gmail.com>
>> To: "ICOM Reflector" <icom at mailman.qth.net>
>> Sent: Tuesday, May 22, 2012 10:16 PM
>> Subject: Re: [ICOM] 17m and preamp question
>>
>>
>> John,
>>   It would be helpful if you provided a little more station
>> information.   What antenna(s) are you using?  How high is it?  How
>> far away are the power lines?   I'm wondering how far away you are
>> from the nearest AM broadcast station, what power level are they
>> running?   Do you see this S8 hash with no antenna connected?  I have
>> the 706Mk2, no I don't have  noise like that preamp on vs off, with a
>> G5RV, 6BTV vertical, or in the car on a mobile antenna with the engine
>> off and away from power lines.  Almost sounds like you're having
>> front-end overload from a local transmitter somewhere.  I've worked
>> about 160 countries mobile from the car with the 706, cw and phone.
>>
>> 73's de Stephen, K0SD
>>
>> *************************************
>>
>> On Tue, May 22, 2012 at 2:54 PM, John G. <af5cc at fidmail.com> wrote:
>>     
>>> I am trying to determine if what I am hearing is typical atmospheric
>>> noise, of if I have a line noise problem of sorts. Here is my situation:
>>>
>>> I have an Icom 706 original model. I find that all three models of theh
>>> 706 are too sensitive on 20m and below with the preamp on-you get to
>>> listen to a S8 noise or so most of the time. So I leave the preamp off on
>>> those bands, and on 30m and below it seems just right on the original
>>> model-you see an S1 or so noise level on those bands. On 20m it is
>>> probably a little deaf with the preamp off, but works fine. On 15m and
>>> above I turn on the preamp and it seems just right.
>>>
>>> So what is people's experience on 17m? With the preamp on I see around a
>>> S7 or so noise level. WIth it off, it seems to lack a little sensitivity
>>> on that band. I did work V85SS on 17m yesterday so I can hear stuff with
>>> the noise that my rig is getting, but it is also tiring ot listen to,
>>> especially if it is something that can be fixed. So, with your 706 (any
>>> model) on 17m, what sort of background noise level are you seeing with the
>>> preamp on?
>>>
>>> 73 John AF5CC
>>> ----
>>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>>> Icom FAQ: http://www.qsl.net/icom/
>>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>>       
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>     
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>
>