Hi Frank,
Thanks for mentioning my portable flag, and that's the way to go to get
close to the area of the suspect pole but I didn't want to toot my own
horn. It really is an easy antenna to build and its build is very
forgiving, and glad to hear it exceeded your expectations.
I do recommend usi
Rick,
When I mentioned using an AM radio with a 3 or 4 element yagi when within
0.25 miles of the source I should have said that’s up on VHF (like 136 or
146 MHz, etc.) if it’s really power line noise (arcing hardware).
Don wd8dsb
On Thu, Dec 29, 2022 at 11:27 PM Don Kirk wrote:
> Hi Fr
Hi Jim,
Below is a link to a simple website I have for my portable flag antenna and
you will find a link in the first paragraph of my website to the original
QST article (with the permission of the ARRL). DX Engineering also sells
what they call their NoiseLoop which is based on my portable flag
Hi Rick and Frank,
This may have already been discussed offline but if WWRU 1660KHz is indeed
one of 2 stations mixing then the math suggests 1380 KHz is a prime
candidate regarding the second transmitter involved in the generation of a
3rd order IMD product that falls on 1940 KHz and it turns out
Hi Frank and gang,
I might be able to help provide some additional insight/direction. This is
not necessarily a case of having to show harmful interference, as the AM
Broadcasters are held to some very stringent spurious emission limits and
the stations actually go through a periodic inspection t
s
for National Radio Systems Committee), and someone who is currently in the
AM broadcast industry should probably jump in and provide more accurate
information than what I've provided.
Don (wd8dsb)
On Sat, Jan 7, 2023 at 1:01 AM Jim Brown wrote:
> On 1/6/2023 9:52 PM, Don Kirk wrote:
>
Hi Michael,
It was a very interesting opening (band improvement) into parts of Europe
from here in Indiana at the same times you mentioned. I just looked at my
contest log and something special started happening around 0500 UTC Sunday
morning which lasted until approximately 0730 UTC (but really
It started off OK here near Indianapolis but as darkness moved West from
here the QRN went way up from the Thunderstorms centered above KS, OK, and
AR. As an example my noise floor when beaming West using my 300 degree
pointed pennant RX antenna was peaking 24 dB above my normal noise floor
most o
Hi Steve,
During 160 meter contests I often experience situations where I can barely
hear a station calling me on my 68 foot base loaded vertical which I use
for transmit but when I switch to any one of my receive pennant antennas
they are often 20db or much more over my noise floor and this typic
Hi George,
On peaks of about 4dB over my noise floor you were solid copy this morning
around 0940 UTC near Indianapolis using my small pennant RX antenna pointed
300 degrees but QSB would often take you down to where it was tough to copy
so just called a few times.
Thanks for trying to accommodat
5B4AMX very strong this evening (Oct 17, 2023 at 0040 UTC) on 160 meters
CW, and here is a link to a video I just uploaded to YouTube which was
recorded while he was working K1TZQ and also calling CQ.
https://youtu.be/8iC2GnusXaA?si=C65b1cjtdB2E9Qk7
I worked 5B4AMX while running 100 watts a few min
Hi Mike,
Probably 8P5A. You will see that call listed in the recent Stew Perry
results.
Don wd8dsb
On Fri, Dec 1, 2023 at 9:16 AM Michael Rutkaus wrote:
> So I hope this isn't too dumb, but there was a contact I made with some
> difficulty: ZP5A in GK03
>
> I remember copying it with grea
Hi Roger,
I know 3 RBN reporting receivers located in New Hampshire use very good RX
antennas and they are as follows based on 2020 information I obtained from
the owner of these receivers.
200m-long Beverage to EU
23' high active Hi-Z vertical
So yes, very good RX antennas on some of the East
they called, so we can listen to the right ones?
>
> I no longer have any antennas.
>
> 73 Mike
> W0BTU
>
> On Fri, Jan 26, 2024, 3:54 PM Don Kirk wrote:
>
> > I know 3 RBN reporting receivers located in New Hampshire use very good
> RX
> > antennas and th
Hi Jim,
Let me take a crack at this based on some online reading I just did, and
the examples I found were based on treating the antenna as a transmission
line (W8JI as well as others treat it this way). I would estimate the
voltage at the tip of 1/4 wave vertical running 1500 watts to be 3437 Vr
Had a similar problem at Field Day a few years ago with WJR (50,000 watt
station). Noticed the problem was not present when antenna tuner was
inline. Many modern rigs have broadband front ends which provide very
little attenuation to out of band signals, and just the addition of an
antenna tuner
CW or Phone to acquire DXCC CW or
DXCC Phone awards, thus helping to keep our assigned spectrum's active as
much as possible).
Don Kirk (wd8dsb)
On Thu, Aug 1, 2019 at 9:04 AM FZ Bruce wrote:
> Yes the ARRL needs to step up.
>
> Years ago there were foot races, then after the inv
I use a 68 foot base loaded vertical wire and what I notice is a
significant downward shift in the resonant frequency during the summer
(like 40 kHz) when leaves are touching my vertical, and when the leaves
fall the resonant frequency comes right back up to where I originally set
it. My feeling i
Hi Doug,
At the very beginning of the recording you can hear part of a character
then "DX K" then when you hear the first UT7NY you can hear a "CQ"
underneath UT7NY and then "DX K". Then after the second UT7NY call you can
clearly hear "CQ VE6WZ DX" and part of the letter "K". At least that's
wh
160 meters was fantastic overnight (Sunday night/Monday morning) from the
Midwest USA into Europe. Signals peaking 20 to 35 db over my noise floor
from big stations that normally run 6 to 12 db over my noise floor when
conditions are good.
It was one of those special nights that only happens a ha
Hi Roger,
It was poor conditions.
Don (wd8dsb)
On Thu, Dec 19, 2019 at 3:58 PM Peter Sundberg wrote:
> The sky was all green and purple from south west to north last night
> due to aurora.
>
> Magnetometer in KP07 swinging wildly.
>
> No NA stations heard (or worked) on 160m at this QTH.
>
> 7
Receiving strong carrier on 1828.5 KHz that sounds like sky wave. Its
currently peaking 30 db over my noise floor at 6:40pm EST (2340 UTC), and
it has an approximate heading of 55 degrees from the Indianapolis area
(Fishers IN) which puts it on a line that goes from my location through the
top of
Thanks guys. It just stopped at 6:57 pm EST.
Don (wd8dsb)
On Mon, Jan 20, 2020 at 6:55 PM Kenneth Grimm wrote:
> Yes, it is about 10 over 9 in central Virginia and hearing it best to my
> NE.
> Ken - K4XL
>
> On Mon, Jan 20, 2020 at 6:42 PM Don Kirk wrote:
>
>> Rec
Hi Rick,
I use a 68 foot base loaded vertical on 160 meters, but I also use 3
different pennant RX antennas. Unless it's ground wave, my 160 meter TX
vertical is often deaf for stations in adjacent states that are in close to
me (say 100 to 200 miles away). Sometimes I can barely hear these stat
ave versus
skywave and their antenna designs).
Don (wd8dsb)
On Sun, Mar 1, 2020 at 9:22 PM Don Kirk wrote:
> Hi Rick,
>
> I use a 68 foot base loaded vertical on 160 meters, but I also use 3
> different pennant RX antennas. Unless it's ground wave, my 160 meter TX
> vertical
.
73,
Don (wd8dsb)
On Sun, Mar 1, 2020 at 10:26 PM Richard (Rick) Karlquist <
rich...@karlquist.com> wrote:
>
>
> On 3/1/2020 6:47 PM, Don Kirk wrote:
> > Hi Rick,
> >
> > One more comment. I believe AM broadcast stations try to avoid phase
> > cancellation betwee
Wow, just about fell out of my chair with Joy when I heard Luis (IV3PRK)
calling North American stations on 160 meters CW this morning.
Luis had a very nice signal, and hope we continue to hear him on 160 meters
CW like the old days.
Don (wd8dsb)
_
Searchable Archives: http://www.
For grins and giggles I ordered 10 2N5109 parts on E-bay (from Asia). Also
ordered new ones from Mouser which I just received today, and also had one
that I purchased a long time ago from Mouser (all of my Mouser purchased
ones are marked CEN on their sides whereas the ones from Asia are
identifi
Hi Dave,
I’m hearing bursts of distorted audio right now on 1830.0 KHZ (it comes and
goes). Bursts peak about 10db over my noise floor.
I’m hearing it on my pennant pointing 40 degrees from near Indianapolis
(02:30UTC).
Don
On Sat, Mar 21, 2020 at 6:43 PM David Olean wrote:
> I turned on my
:33 PM Don Kirk wrote:
> Hi Dave,
>
> I’m hearing bursts of distorted audio right now on 1830.0 KHZ (it comes
> and goes). Bursts peak about 10db over my noise floor.
>
> I’m hearing it on my pennant pointing 40 degrees from near Indianapolis
> (02:30UTC).
>
> Don
>
wrote:
> That is good. I will see what happens when I call them. I suspect they
> will do nothing as there is probably no engineer on staff. A VE3 ham
> told me that this station is notorious in that area!
>
> Thanks again
>
> Dave K1WHS
> On 3/26/2020 2:39 AM, Don Kirk wrote:
ory list. There is no receptionist to answer the phone during the
> day. I left my second e mail with contact information, but have yet to get
> any response. I'll try the FCC if I do not hear from them in a day or two.
>
> Dave K1WHS
> On 3/26/2020 2:07 PM, Don Kirk wrote:
&g
Hi Roy,
Numerous stations in Canada and the US are encountering the same RFI
(originating from the same station near Niagara Falls). In recent years we
have encountered similar RFI on 160 meters from an AM broadcast station in
New Jersey as well as one in Kentucky that had spurious emissions up o
Turned radio on this morning at 0514 UTC even though we were having very
bad lightning storms all around and was blessed with some of the strongest
signals I have ever heard on 160 meters out of the UK a little before their
sunrise. Copy was very easy right through the constant lightning crashes
t
/vZ-9cWOTlKY
While watching the video keep reminding yourself that my noise floor
without the static crashes from lightning is typically S0 to S1.
Just FYI, and 73.
Don (wd8dsb)
On Sun, Mar 29, 2020 at 3:14 AM Don Kirk wrote:
> Turned radio on this morning at 0514 UTC even though we were hav
Hi Steve,
Interesting that you mentioned path distortion. I did not notice path
distortion (what I was calling flutter) on the European signals I was
copying this morning, but I did notice it on you and other North American
signals. I mentioned this to another ham this morning as it was indeed o
Hi Roger,
I believe your having a big 40 dB S/N report from NH on the RBN is not as
telling as what the RBN did not show for you. If you look at the last 100
RBN spots of you last night which was from 0107 UTC until 0317 UTC you were
only picked up in the US by the RBN's in NH, and then one time
Hi Roger,
I just checked with Brad (W1NT), and he said he currently has 3 RBN
receivers running, and it looks like all 3 spotted you this morning. All 3
of his receivers are located on the same property in NH. Two of them use
beverages and one uses a vertical. One beverage is pointed NE and the
Hi Mikek,
Speed of Light = Frequency x Wavelength
Therefore: Speed of Light/Frequency = Wavelength
Speed of light = 299 792 458 m / s (I normally just use 300,000,000 m/s)
Therefore: (300,000,000m/s) / (119 Hz) = 252.10 meters But this is a
full wavelength, so you have to divide 252.10 meters
Hi Rick and gang,
The biggest problem with the band in the summer in the Midwest USA is high
QRN level from lightning. As an example during the Stew Perry contest this
past weekend our noise floor during hours of darkness in Indiana was
running 20 to 30 dB above our normal noise floor due to ligh
Hi Fred,
Do you have a police radio scanner that covers the aviation band? If so it
makes for a great 136 MHz AM receiver that can be very helpful in narrowing
in on the faulty pole especially when a portable directional antenna is
connected to it (especially if you can throw in 20 or 30 db of at
Hi Tony,
Was the Binocular Core in an enclosure or out in the open? I could see ice
being the cause of a shattered Binocular Core (water filling the holes and
then turning to ice).
Just a wild guess.
Don (wd8dsb)
On Mon, Oct 5, 2020 at 7:19 AM tony.kaz--- via Topband <
topband@contesting.com>
Hi Dave,
I totally agree with your 160 meters condition report for CQWW this past
weekend. I operated slightly less than 2 hours since conditions were so
poor, and signals out of Europe were indeed very weak here in the midwest
US. See you during the ARRL 160, and it should be fun as usual regar
I’m hearing a very strong pulsating signal that sounds like it might be
some kind of digital communications and it’s bearing is approximately 73
degrees from my QTH near Indianapolis and wonder if others are hearing it
at at what heading and does anyone recognize what it is? It’s on right now
at 7:
, Dec 11, 2020 at 7:15 AM David Raymond
wrote:
> Signal bearing from central Iowa/EN21 is about 70 degrees based on some
> interpolation from the 8 circle array.
> On 12/11/2020 6:06 AM, Don Kirk wrote:
> > I’m hearing a very strong pulsating signal that sounds like it might be
>
, Dec 11, 2020 at 7:31 AM Don Kirk wrote:
> Hi Dave,
> Thanks and glad others are hearing it too. I just looked at it on an SDR
> receiver and it has a bandwidth of 400 Hz, and it's using two different
> frequencies spaced 200 Hz apart. Very Strong here near Indianapolis.
> P
Correction, it stopped at 7:54 EST.
73,
Don (wd8dsb)
On Fri, Dec 11, 2020 at 8:00 AM Don Kirk wrote:
> Hi Topband Gang,
>
> Thanks to everyone that reported reception of the signal. It stopped at
> 7:54am EDT. Based on preliminary data which probably did not have enough
>
Hi Dave,
And here in the midwest (Indiana) it was really dead early this morning an
hour or two before EU sunrise. I spotted DL5AXX who was peaking 6 dB above
my noise floor at most at 0623 UTC, and no other EU stations heard as I
recall, it was just dead.
Don (wd8dsb)
On Wed, Dec 16, 2020 at 1
Hi Lee,
Csaba said his transformer was " n1=3T/n2=12T tapped @6T ". This sure
sounds like a transformer with two separate windings (3 Turns on the
Primary, and 12 Turns on the Secondary and then it also has a center tap on
the secondary), but I could be wrong. I think Csaba needs to clarify
exa
2, 2021 at 4:09 PM Don Kirk wrote:
> Hi Lee,
>
> Csaba said his transformer was " n1=3T/n2=12T tapped @6T ". This sure
> sounds like a transformer with two separate windings (3 Turns on the
> Primary, and 12 Turns on the Secondary and then it also has a center tap o
Hi Roger,
Signal report comparisons with the modern radios that often have preamps
that you can switch in or out really clouds the picture as well as the fact
most stations on topband use RX antennas. Assuming that all manufacturers
have S meters that are calibrated identical to each other (whic
Hi Roger and gang,
I operated W9VW which is a pretty big contest station Saturday morning but
did not get on 160 meters until 0545 UTC, and I commented to my fellow
operators that conditions were about as poor as I have ever encountered on
160 from Indiana into Eu and I was running 1300 watts vers
HI Steve,
Thanks for the nice implementation comment.
The portable flag front to back ratio is highly related to the elevation
angle and frequency of operation (just like any terminated loop), and
therefore I did not want to overstate the front to back ratio in my
portable flag article. I design
degradation. Don, maybe you can
> > comment here as well on this aspect of the antenna.
> >
> > As I also mentioned in my earlier post, the dimensions of the DXE
> > implementation are somewhat smaller than what's given in the QST article.
> >For me, that works ou
Hi Rob,
Front to back ratio all depends on the arrival angle of the signal, and the
portable flag directional properties are just like full size flag
directional properties assuming you select the appropriate termination
resistor. On my portable flag website I show front to back ratio vs
elevatio
;
> TKS for starting this discussion as we still have more to discover with
> resistor loaded loops.
>
>
>
> 73,
>
> George,
>
> AA7JV/C6AGU
>
>
>
>
>
>
>
> On Tue, 23 Feb 2021 21:46:15 -0500
>
> Don Kirk wrote:
>
> Hi George,
>
&g
e attributable to common mode degradation. Don, maybe you can
> > comment here as well on this aspect of the antenna.
> >
> > As I also mentioned in my earlier post, the dimensions of the DXE
> > implementation are somewhat smaller than what's given in the QST article.
>
Hi John,
You started this mess (or maybe I did), and finally here is my response to
a few of the questions you had and thanks so much for waiting in line for
my response.
1) As I have mentioned in a few other responses I suspect having the short
10 foot feedline helps to negate common mode noise
> Tim K3LR
>
>
> -Original Message-
> From: Topband [mailto:topband-bounces+k3lr=k3lr@contesting.com] On
> Behalf Of Don Kirk
> Sent: Wednesday, February 24, 2021 3:33 PM
> To: john.kaufm...@verizon.net
> Cc: TopBand List
> Subject: Re: Topband: The WD8DSB min
Hi Jim,
It’s funny that you brought up this topic as yesterday when I was doing
comparisons of the signal I could hear on my 160 meter vertical TX antenna
versus my portable flag, I increased the averaging value on my portable SDR
receiver connected to my portable flag and the signal that was bare
ch exposes the CW signal I am generating locally for
this test of the averaging function.
Sorry to take up so much bandwidth on the topband reflector, but it really
is an interesting discussion.
Just FYI,
Don (wd8dsb)
On Thu, Feb 25, 2021 at 11:24 PM Don Kirk wrote:
> Hi Jim,
>
>
Hi Rick,
This next piece of info is not really related, but here is another data
point for folks since you mentioned using an AM radio with built in bar
antenna tuned to 1710 KHz to track down powerline noise. I just checked
the sensitivity of my portable flag versus built in bar antenna on a pre
Hi JC,
Thanks for posting all the great info.
In my article I mentioned I normally use 20 dB of gain with my portable
flag, but on 80 and 160 I sometimes use more gain. I just double checked,
and sure enough I really do need more than 20 dB of gain on 160 meters when
using my DX-440 receiver on
d8dsb
Don
On Fri, Feb 26, 2021 at 4:43 PM Don Kirk wrote:
> Hi JC,
>
> Thanks for posting all the great info.
>
> In my article I mentioned I normally use 20 dB of gain with my portable
> flag, but on 80 and 160 I sometimes use more gain. I just double checked,
> and sure en
Hi John,
I think a tee is an excellent antenna for DX and as others have mentioned
and that’s what I would us but thought I should mention something regarding
NVIS capabilities. I suspect a tee is deaf as can be for NVIS signals just
like my 68 foot base loaded vertical that I use on 160 meters.
Hi Roger,
I had a lot of fun early this morning working into Eu an hour before
through a little past their sunrise. A lot of QSB but pretty decent
signals and I even did a 2 way 100 watt QSO with F5PLC. Did have QRN from
lightning off SE coast of US. Definitely sunrise enhancement for a change.
I uploaded a short video of Luke (VK3HJ) who had a wonderful signal today
just prior to my sunrise. This video was right after the QSO I had with
Luke and I easily worked him with my 100 watts (thanks Luke).
Here is a link to the youtube video: https://youtu.be/882ZBtfbEAA
73,
Don (wd8dsb)
_
A couple of weeks ago there were a lot of postings about my portable flag
for radio direction finding (for tracking down RFI), and someone asked
about the DX Engineering preamp that was designed for use with my portable
flag and specifically what the noise figure was for this preamp. Tim
(K3LR) sa
I should have said the so the 4.5 dB noise figure is certainly not
unreasonable.
Sorry for the typo.
73,
Don (wd8dsb)
On Tue, Mar 9, 2021 at 6:20 PM Don Kirk wrote:
> A couple of weeks ago there were a lot of postings about my portable flag
> for radio direction finding (for tracking do
Hi Gary,
Yes, based on how strong the RFI is on 20 meters, your un-tuned shielded
loop should definitely hear the noise on 20 meters (as an example) based on
my tests even without using an external preamp with your loop. Your
un-tuned shielded loop works just as good as a conventional one of simi
ist.
>
> On 3/27/2021 4:06 AM, Don Kirk wrote:
> > Hi Gary,
> >
> > Yes, based on how strong the RFI is on 20 meters, your un-tuned shielded
> > loop should definitely hear the noise on 20 meters (as an example) based
> on
> > my tests even without using an ex
While playing around with my portable flag that I designed for MF/HF radio
direction finding, I noticed something that confused me for about a year,
and I finally figured out what's going on which led me to think about the
160 meter skewed path comments I've seen over the years and wonder if some
o
21 at 12:57 PM James Wolf wrote:
> Don't dismiss the possibility of multipath reflections.
>
> Jim - KR9U
>
>
>
>
> -Original Message-
> From: Topband [mailto:topband-bounces+jbwolf=comcast@contesting.com]
> On
> Behalf Of Don Kirk
> Sent
ppears like circular polarization, etc. so it's a very
complex picture.
Thanks,
Don (wd8dsb)
On Thu, Jun 3, 2021 at 1:30 PM Don Kirk wrote:
> Hi James,
>
> Yes, multipath is certainly a variable, and I'm actually trying to include
> something that's not outwardly obvious re
Hi John,
Hard for me to argue your purely vertical antenna system skewed
observations.
Thanks as always.
Don (wd8dsb)
On Thu, Jun 3, 2021 at 2:06 PM John Kaufmann
wrote:
> On 160 and 80, I have an 8-circle vertical receiving array. On very long
> paths, it is not uncommon to see skewing. The
Karel (OK1CF) was calling CQ for hours on end early this morning with very
few callers, and his signal was very steady into the Indianapolis area so I
decided to record and upload a brief recording of him to help motivate the
topband gang. Karel consistently has one of the strongest signals out of
Hi Chuck,
Based on the application you mentioned, I suspect you’re looking for
commercially available bias tees. MFJ sells Bias Tees.
Don (wd8dsb)
On Fri, Dec 3, 2021 at 3:33 PM Chuck Hutton wrote:
> Hi -
>
> Many years ago I saw some ground loop isolators that pass DC.
>
> That is exactly wh
Andy (DL8LAS) had a very nice signal into the Midwest US last night. I
made a brief recording of him calling CQ and uploaded it onto youtube.
Peaks were very strong but there was also considerable QSB (somewhat rapid
and deep).
Here is a link to the video for those interested.
https://youtu.be/Oj
Hi Mike and gang,
It has been a long time since I looked at the SAL in which I modeled it
with the help of the designer of the SAL (KB7GF). The SAL is actually
different than the K9AY and other EWE types of RX antennas which have a
typical RDF value of around 7.8 because the SAL (Shared Apex Loop
e RDF of the K9AY is the same of the SAL, the EZENEC does a horrible job
> with loops close to the ground.
>
> Saying that, both antennas are excellent receiver antennas if you don’t
> have anything else.
>
> 73’s
> JC
> N4IS
>
> Sent from Mail for Windows
>
> F
similar to verticals like
those used in the YCCC design as an example) spaced 29 feet apart (same
dimensions as a full size flag) and obtain an RDF of 9.26 which is
definitely not the same as the Flag (just something to ponder).
Don (wd8dsb)
On Fri, Jan 7, 2022 at 12:14 AM Don Kirk wrote:
> Hi
Hi Andy,
I agree with David (K1WHS) that your RF Spectrum waterfall display does not
look like powerline noise as it shows very repeatable bright and dark bands
and the bright bands are equally spaced approximately if not exactly 500 Hz
apart from each other and this is not what you would typicall
Hi Bill,
You should still be able to compare yourself to V31MA using the RBN data.
Just find out how much power V31MA was running and compare it with your
power level in units of dB. Then you can use the RBN data to compare your
signal to V31MA as long as you subtract the dB difference in power f
Hi Bill,
I misunderstood, it looks like V31MA was running low power, so you would
have to subtract off the difference in dB from your RBN data to see how it
compares with V31MA.
Don (wd8dsb)
On Mon, Jan 31, 2022 at 4:30 PM Don Kirk wrote:
> Hi Bill,
>
> You should still be able t
Hello Topbanders,
For the past few months I have been plagued by what I suspected was power
line noise on 160 meters, and finally was able to track it down to a power
line pole 0.66 miles from my house and learned a bunch during the process.
While this topic has been covered in the past, I thought
Today I built the ADSL filter today that Rag (LA6FJA) provided the link
for, and it solved my DSL crashing problem.
I fought this problem for numerous years when running 100 watts on 160
meters and previously threw a bunch of toroid chokes at the problem with no
success, but today in the 160 meter
K1PX said,
I've covered my resistors and solder joints with GE Silicone II sealant
> and have never had a problem.
>
I do the same thing with my pennant termination resistors (just cover them
with GE Silicone II sealant).
73's
Don (wd8dsb)
_
Topband Reflector
WA3MEJ said :
be very sure that if you pick GE silicone sealant.. (RTV or whatever you
> call it) DO NOT use the kind that has acetic acid in it.
>
This is a very good point, and this is the reason I use GE Silicone Sealant
II versus GE Silicone Sealant I. GE Silicone Sealant II is a "neutral cu
In February of this year I built another ADSL filter originally designed by
OZ1CTK, but this time I used off the shelf surface mount components (my
original build used through hole components, etc.). For my surface mount
build I used a single sided circuit board and a Dremel tool with cutoff
wheel
Dean,
I purchase the 2.4" O.D. 31 mix cores (Fair-Rite part number
2631803802) from Arrow Electronics, and the single quantity pricing is
currently $4.83 per part.
Shipping is $8.00, but the low piece price more than makes up for the
shipping cost.
Arrow Electronics is a Fair-Rite distributor, an
This month a beacon like CW signal appeared on 1.816 Mhz at my location (24
hours a day, 7 days a week), and yesterday with the help of my neighbor I
was able to locate the source of the signal which turned out to be a bad
cable (homemade) that was connected to my neighbors AT&T U-verse wireless
ga
ary = 9 pf, capacitance not
measured at RF
Has anyone else stumbled upon the above phenomena, and am curious why there
has been no mention of it before (or if there has been it's very hard to
find)? I'm very happy with the performance of my binocular core
transformers, but I'm technically i
thru and then forcing a toothpick thru to force the most
separation."
Thanks to Rick and Carl for the technical discussions we had.
73,
Don Kirk (wd8dsb)
_
Topband Reflector
I've been using Radio Shack 30 AWG insulated wire (wire wrap wire) to wind
my binocular cores for RX antennas. It comes in 50 foot spools, and you
can buy it in Blue, Red, or White. This insulated wire has made winding of
my binocular cores a real pleasure. No more worries about scratching the
e
Approximately 128 deg from WD8DSB (EM69) using small DF loop.
On Fri, Nov 1, 2013 at 7:12 AM, Mike Waters wrote:
> A steady carrier from fish net beacons doesn't fit the pattern of the ones
> everyone has heard on 160. That would deplete the batteries fairly quickly.
> All the ones I know of se
I'm mapping the data, but nothing to hang my hat on at this time. The data
from Steve (KK7UV) does not intersect any of the other reports (odd). A
heading from W8JI or AA1K would be very helpful.
Don (wd8dsb)
On Fri, Nov 1, 2013 at 7:45 AM, Mike Waters wrote:
> It's mostly S8 on my SE 580' B
OK, while we are on the topic another very big factor to think about is
magnetic north vs. true north (I have tried to not bring this up in the
past). I don't expect any response to this, but this has always been in
the back of my mind and wonder what headings are really being reported
(what is th
Having more time this evening I went to an open field with two different
portable DF antenna systems (shielded loop, and terminated flag), and I'm
now going to say the signal is 140 degrees from my location just NE of
Indianapolis (140 degrees True heading).
Don (wd8dsb)
On Fri, Nov 1, 2013 at
Oops, I compensated for true north backwards on my last report. Therefore
I should have said the signal is 130 degrees from my location just NE of
Indianapolis (130 degrees True heading which is very close to the 128 deg
number I said this morning).
Don
On Fri, Nov 1, 2013 at 9:32 PM, Don Kirk
Paul and Gang,
Based on Pauls heading and a few other headings that intersect Pauls
heading, it looks like the signal is originating from the lower half of NC,
or the NE part of SC that touches NC.
Hard to describe, but an area like Fayetteville NC to the North, Wilmington
NC to the South East, a
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