Oh...wait...facts have gotten a bit distorted here..
1: I have only had issues with the network adapter in the laser printer.
2: My speakers are fine. I was coming through the subs with the Henry
amplifier, but *NOT* affecting the network adapter in the printer.
3: With the L7 in line, The subs no longer 'hear' my amp when I am online,
but the network adapter in the printer is paying the price.
Those are the *only* issues.
My OCFD IS installed correctly, with the proper 4:1 balun (Current balun, if
memory serves), and fed with good coax, not the cheap, Radio Shack garbage.
The only thing that could be better is height. It is only, on average, 20
feet in the air, and 3/4's of it is on the top of a 15 foot berm, therefore
35 feet in the air. Rarely is the amp on for DX, simply not needed. 90% of
my DX or cross-county conversations are around 70 to 90 watts. The power is
mainly used for cloud burning into Northern, Central, and Southern
California, Oregon, and Baja California.
I do not have a vertical, in any form. Been sorta looking for a good,
affordable used Hygain HyTower. Had one once, on my old property and it
was, without a doubt, the best vertical ever made. I sold it when we built
our new house in the city. My flat topped OCFD is great for DX'ing and long
distance.
I got into the phone system here badly, with the Henry Amp, but, the L7 has
no effect on the phones, which is a Panasonic 1.9GHz, DECT 6.0 phone.
I am just trying to finger out *how* RF is getting into my network and
smoking the net card in the printer, and how to stop. As I said, there is
***NO*** RF floating around the shack, that was the first thing I checked.
Even had a good friend to looks for RFI issues for the phone company check
out my findings and said my old, homebuilt 'RF sniffer' is reading
correctly. I have a mystery, and want to solve it. I am going to read the
information that Jim so kindly gave me (us) the website for and see if I can
glean anything out of that source.
Joe - W7RKN
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of Dave Cole (NK7Z)
Subject: Re: [RFI] RFI In My Shack
Hi Matt,
The OP is actually burning things up in his shack, and destroying speakers,
so I suspect that takes priority over DX at this point. I live by Jim's
papers! They have been the most useful work I have found for day to day
solutions. Take a look at Jim's talk here:
http://audiosystemsgroup.com/KillingRXNoiseVisalia.pdf
73s and thanks,
Dave
NK7Z
http://www.nk7z.net
On 12/02/2017 04:43 PM, Matthew King - KK4CPS wrote:
> Dave, there's nothing wrong with an OCFD *IF* it's fed properly, i.e.
> through *proper* baluns & chokes. The fundamental band of the antenna
> (40 or 80, for example) and the exact split make huge differences.
>
> Clearly you've had a bad an experience with a bad OCFD if you think
> ANY vertical, even with decent radial field, will outplay it! Having
> used both, I can tell you with certainty that it's simply not the case.
>
> Read the links that I posted earlier in this thread and you can learn
> a lot. The OCFD can be an outstanding antenna, but not if it's thrown
> up over a roof with a 33%/67% split on 80m with a 4:1 voltage balun in
> it. THAT is a recipe for disaster!
>
> Jim's publications on the subject illustrate *proper* chokes. Check
> 'em out....
>
> 73, y'all
>
> Matt
> AK4MK
>
> On Sat, Dec 2, 2017 at 7:34 PM, Dave Cole (NK7Z) <dave@nk7z.net> wrote:
>
>> I'm with Jim here... This is a recipe for RFI...
>>
>> If it were me, I would replace the OCF dipole with almost anything
>> else, especially if you are running power. That type of antenna
>> causes more RFI issues than almost any other type of antenna, save an end
fed...
>>
>> You made a comment about needing the power to get out, that might
>> indicate an antenna issue, so maybe replacing the OCF with a good
>> vertical and a decent radial field, or a dipole, up as high as
>> possible, is in order here...
>>
>> 73s and thanks,
>> Dave
>> NK7Z
>> http://www.nk7z.net
>>
>> On 12/02/2017 02:50 PM, Jim Brown wrote:
>>
>>> On 12/2/2017 1:59 PM, Joe wrote:
>>>
>>>> I use coax as a feed, not twin lead. Twin lead will not survive
>>>> 100 mph winds, which are common at my location.
>>>>
>>>
>>> N6BV, retired ARRL Antenna Book and Handbook editor, wrote a great
>>> piece that ran in QST about two years ago showing that even with
>>> coax, a choke will fry very quickly when feeding an antenna not
>>> matched to the feedline (that is, up in the air).
>>>
>>> 73, Jim K9YC
>>>
>>>
>>> _______________________________________________
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>>> RFI@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>>>
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