Actually, he does https://www.dj0ip.com/about_ocfd
On 11/24/2022 12:31 PM, Edward Mccann wrote:
Kent:
I find that while your named expert with “more practical research than anyone
on the planet”will likely claim expertise in just about anything, I have never
seen anything observational,
Kent:
I find that while your named expert with “more practical research than anyone
on the planet”will likely claim expertise in just about anything, I have never
seen anything observational, analytical, or anecdotal written by him on RFI in
general or specifically associated with the OCFD.
I
On 11/24/2022 8:45 AM, K9ZTV wrote:
Amen to everything Steve says.
Yes.
DJ0IP, who has done more practical research on off-center-fed dipoles than
probably anyone on the planet, has concluded they are fine up to 500-700 watts,
but problematic above that and not recommended.
Those
th.net Subject: Re:
[Elecraft] Running high power Certainly as you increase power you are more
likely to cause undesirableeffects in the home. Now I am going to make a
generalization that I havefound true. The antenna type makes a significant
difference ininterference. Unbalanced antennas introduc
Suggest that this thread has migrated greatly from one directly relevant to
Elecraft equipment.
Tom W4KX
Sent from my iPad
> On Nov 24, 2022, at 11:45 AM, K9ZTV wrote:
>
> Amen to everything Steve says.
>
> DJ0IP, who has done more practical research on off-center-fed dipoles than
>
Amen to everything Steve says.
DJ0IP, who has done more practical research on off-center-fed dipoles than
probably anyone on the planet, has concluded they are fine up to 500-700 watts,
but problematic above that and not recommended.
73,
Kent
K9ZTV
> On Nov 24, 2022, at 9:37 AM, Steve
Certainly as you increase power you are more likely to cause undesirable
effects in the home. Now I am going to make a generalization that I have
found true. The antenna type makes a significant difference in
interference. Unbalanced antennas introduce more RF into the home as
opposed to
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Al Lorona
Sent: Wednesday, November 23, 2022 10:06 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Running high power
Thank you for all your responses. I did not mean my question to solicit the
t
Ed:
If she’s lucky she could stream it on her new I-pad you buy her for Christmas !
Ed McCann
AG6CX
> On Nov 23, 2022, at 8:42 AM, Ed Cole wrote:
>
> I only have one RFI issue with my K3+KXPA100: running 80w on 50.125 SSB.
>
> Seems my wife has her portable radio tuned to 100.1 MHz FM in
n the doorbell rings, the
amp gets turned off!
Good luck-this is an interesting journey!
'73 de JIM N2ZZ
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Al Lorona
Sent: Wednesday, November 23, 2022 11:06 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft]
: [Elecraft] Running high power
Message-ID:<1647168817.1936686.1669156606...@mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
I'm really curious to ask those on this list who run high power:
Do you find that you get into all kinds of devices around the house?
I ran the K
I only have one RFI issue with my K3+KXPA100: running 80w on 50.125 SSB.
Seems my wife has her portable radio tuned to 100.1 MHz FM in the next
room. 50.125 x2 = 100.25 "ouch"!
Antenna is 20-foot high on tower attached to end of the house.
Guess I need a "good" harmonic filter.
I had one
Thank you for all your responses. I did not mean my question to solicit the
thousands of ways of solving this problem, but merely a poll of hams'
experiences running high power. Based on all of the private and public
responses I received, it's about 50% who've had problems with consumer
What antenna, choke and feedline are you using?
John KK9A
Al Lorona W6LX wrote:
I'm really curious to ask those on this list who run high power:
Do you find that you get into all kinds of devices around the house?
I ran the KPA-500 in an extended manner for really the first time during the
I'm
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Dave (NK7Z)
Sent: Wednesday, November 23, 2022 9:16 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Running high power
Al,
Are you by chance running an end fed antenna?
73, and thanks,
Dave (NK7Z
: Re: [Elecraft] Running high power
On 11/22/2022 2:36 PM, Al Lorona wrote:
> 1/ interfered with FM broadcast radio.
>
> 2/ caused the internet to drop out every time I keyed up on the lower bands.
>
> Am I the only one? Those of you who run high power all the time... how
Al,
Are you by chance running an end fed antenna?
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 11/23/22 05:59, Wes wrote:
I run a KPA500 all of the time; essentially, I run a
I run a KPA500 all of the time; essentially, I run a 500W transceiver. I have
never had an issue as you describe. The only chokes in the shack are the ones
molded onto the various computer cables that come with them.
Outside, I use a homebrew W2DU type balun (sorry Jim) at the feedpoint of
On 11/22/2022 2:36 PM, Al Lorona wrote:
1/ interfered with FM broadcast radio.
2/ caused the internet to drop out every time I keyed up on the lower bands.
Am I the only one? Those of you who run high power all the time... how do you
deal with these annoyances?
Both are caused by lousy
All of the information that you will get on bonding equipment and use of
ferrites (31 mix seems best for HF) will help.
But in my opinion, the single most important thing you can do is to
reduce common-mode RF flowing on your feedline. That requires a common
mode choke at the feedpoint of your
Al - I’m not on the RFI reflector, but wanted to give you a quick reply here,
since it in a way does involve Elecraft things. I have a K4D, KPA500, KAT500
and run RG-213 to a 30 foot tall Zerofive Flagpole vertical in the back yard -
10 various length radials. I put isolation transformers on
Al, you really should take this question to the r...@contesting.com
reflector - there is a huge amount of experience--based information
there from a number of RFI mavens. One of the most energetic and
prolific is K9YC, who has written a number of very detailed papers on
various aspects of RFI
I'm really curious to ask those on this list who run high power:
Do you find that you get into all kinds of devices around the house?
I ran the KPA-500 in an extended manner for really the first time during the
Phone SS and immediately:
1/ interfered with FM broadcast radio.
2/ caused the
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