BLIND-HAMS Archives

For blind ham radio operators

BLIND-HAMS@LISTSERV.ICORS.ORG

Options: Use Forum View

Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Colin McDonald <[log in to unmask]>
Reply To:
Colin McDonald <[log in to unmask]>
Date:
Mon, 1 Mar 2010 21:49:38 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (129 lines)
when I got my first dsl modem, the ISP sent me four of those modular inline 
filters...essentially they were sent out to eliminate data hash on the phone 
line caused by the dsl modem...but since I didn't have any of that, I stuck 
two of those filters end to end on each main phone and got rid of the little 
bit of RFI that was getting into the telephones.
I've not had to use them since we switched to wireless phones only, but I 
still have them around in case I ever need to put some on a neighbors land 
line phone.
73
Colin, V A6BKX
----- Original Message ----- 
From: "Lou Kolb" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, March 01, 2010 4:22 PM
Subject: Re: need info


> Kcom made and possibly still makes inline filters for phones.  In my
> experience, they do a terific job and, since they're inline with a modular
> plug on one end and a socket on the other end into which you plug the 
> phone
> line, they're quite easy to install.  Just make sure you get it as close 
> to
> the phone as possible. Lou
> ----- Original Message ----- 
> From: "Butch Bussen" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, March 01, 2010 5:58 PM
> Subject: Re: need info
>
>
>> I'm not sure where you'd get them these days, but there use to be
>> companies that sold rf filters for phones.
>> 73
>> Butch Bussen
>> wa0vjr
>> open Node 3148
>> Las Vegas
>>
>>
>> On Mon, 1 Mar 2010, Junior
>> Lolley KG4ITD wrote:
>>
>>> Steve, I tried ferrite chokes on the phone line to the dsl modem no joy.
>>> I even tried a different length of phone line to the modem no joy.
>>> I have very little coax left leading to the balun.
>>> The g5rv is up 40 foot on the tower.
>>> The tower is about 12 to 15 foot from the house.
>>>
>>>
>>> Junior Lolley KG4ITD Liberty County E. C.
>>>
>>>
>>> -----Original Message-----
>>> From: For blind ham radio operators
>>> [mailto:[log in to unmask]]
>>> On Behalf Of Steve Forst
>>> Sent: Monday, March 01, 2010 11:05 AM
>>> To: [log in to unmask]
>>> Subject: Re: need info
>>>
>>> Junior,
>>>
>>> I don't think it's really possible for Joe Average ham to measure the
>>> actual
>>>
>>> resistance to the earth using  a regular ohm meter.   I think power
>>> companies and others who need to  get things down to that last fraction
>>> of
>>> an ohm, use something called a "Megger" to measure actual ground
>>> resistance.
>>>
>>> You seem to be well grounded and maybe should look elsewhere.    You
>>> mentioned yesterday you were trashing your neighbors DSL.   If that is
>>> the
>>> only RF problem, maybe you should attack it there.   Ferrites on the
>>> phone
>>> line and the wall wart power supply for the DSL modem might help.
>>>
>>> If you prefer trying to fix it from your end:  Do you have a low pass
>>> filter
>>>
>>> in line?  If not, maybe borrow one and see if it helps, if you  already
>>> have
>>>
>>> one, try removing it  and test things.   If you have some excess coax in
>>> your feed line, try winding a choke balun.  6 or 8 turns around a six
>>> inch
>>> diameter and held in place with tape or zip ties.  If possible, wind
>>> right
>>> at the place where the coax terminates to the ladder line of your G5RV.
>>> You
>>>
>>> will need roughly 20 feet of extra coax, depending on the type of coax
>>> you
>>> are using.
>>>
>>> If there is no excess feed line, just get a length of coax with the
>>> proper
>>> connectors or adapters and insert it in the feed line.  There are 
>>> chokes,
>>> baluns, and line isolators you can buy, but no sense spending money 
>>> until
>>> you  are sure it will solve the problem.
>>>
>>> Good luck, Steve KW3A
>>> ----- Original Message -----
>>> From: "Junior Lolley KG4ITD" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Monday, March 01, 2010 6:38 AM
>>> Subject: need info
>>>
>>>
>>>> I have been having rf problems on 75 and 80 meters.
>>>> I am grounding my system even more.
>>>> I added some grounding yesterday and the ohm meter says the reading is
>>>> 0.23.
>>>> How much more do I need to lower the reading?
>>>> Or is this ground alright?
>>>> Any help is appreciated.
>>>> I am using 4 eight foot ground rods tied together with 6 gauge stranded
>>>> copper wire.
>>>>
>>>>
>>>> Junior Lolley KG4ITD Liberty County E. C.
>>>>
>>>
>>> 

ATOM RSS1 RSS2