Topband: ARRL DX CW Contest

Best top-band conditions I've heard in a while. Mid-West and West Coast romping in both mornings, including CA - N6RO and WA6KHK. 73, Tom G3OLB _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Topband: VK/ZLs in the CQWW CW 160?

"Didn't hear any VKs or ZLs during the contest; were any of you on??" Well, I worked from a small city lot in Sydney, running QRP. Inverted L for TX with a vertical section being approx. 70 ft, terminated vertical Flag 5m x 8m and a passive Moebius loop for RX. TX antenna radials temporary laid

Topband: Inverted-L Question

simply extended the antenna length to make it slightly inductive. 73, Tom G3OLB _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Topband: ZL1AZ

Good signals peaking at my sunrise this morning from Dennis ZL1AZ. Nice to hear 160 conditions improving. 73, Tom G3OLB _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: J28MD, conditions

se unattended modes allow qsos to be made >> while the Dxpedition operators sleep. But that does not make me feel better >> about it. >> >> I am not interested in the digital modes, preferring the traditional modes >> of CW and SSB. I understand that others feel differ

Re: Topband: J28MD, conditions

On thursday night conditions here in w1 land were outstanding! J28MD (cw) and 5V7RU (ft8) got in the log and I heard HS0ZOY (ft8) at his SR at -5 for about 5 minutes. first HS I have ever heard. hope i get a chance with T88. > On Nov 5, 2022, at 12:00 PM, David Raymond wrote: > >

Topband: Unsubscribing

are lifted and when we do, we will certainly get together. Best 73, Tom G3OLB _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Topband: Topband Conditions

Just to add to the discussion on band conditions, Mike W4EF near LA was romping into UK this morning, Tuesday at 0800 sunrise, peaking 8 to 9 and Larry N7DD was well over the 9. Apart from those two, the band was devoid of CW during the short time I was on. 73, Tom G3OLB

Topband: DXE Thunderbolt

, so rather than making the antenna slightly longer and inductive, it is probably better to make it slightly shorter and capacitive and then matching with a small shunt inductor, known as a 'hairpin'. Look forward to hearing you on 160! 73 Tom G3OLB _ Searchable Archives: http

Topband: CQWW a bust this year

. Except for VY2ZM all NA's were weak including KC1XX and W3LPL! Hopeful things improve for next weekend and will work some more in ARRL 160. CU Tom sp5xo Conditions certainly didn't favor 160 over the weekend CQWW contest here in > Florida at least. > > Looking back in 2019 I worked 50

Topband: Quick Favor

- This mail is in HTML. Some elements may be ommited in plain text. - Hi, Do you have an Amazon account? Thanks Tom _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: INV L matching

something. Is there anybody who tried this one? Thanks Tom sp5xo _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: (no subject)

and Stu NV3N who i worked earlier this week with my NVIS antenna and 100W. So there is still some room for tiny pistols. Just throw some CQ to gime us a chance guys! CU on 160. Tom sp5xo > > On 3/27/2020 5:49 AM, Andree DL8LAS via Topband wrote: > > hey topbanders, > > >

Re: Topband: (no subject)

and Stu NV3N who i worked earlier this week with my NVIS antenna and 100W. So there is still some room for tiny pistols. Just throw some CQ to gime us a chance guys! CU on 160. Tom sp5xo On 3/27/2020 5:49 AM, Andree DL8LAS via Topband wrote: hey topbanders, condx were not bad this morning

Topband: 160 conditions

It's nice to hear the band back in good shape again after a few years. Big CW signal from W4EF in CA this morning along with ZL3IX, also a string of JAs/HL earlier this week. Let's keep the 160 CW activity up! 73, Tom G3OLB _ Searchable Archives: http://www.contesting.com

Topband: Safety with pneumatic tennis ball launchers

G4FTC wrote "The one thing that scares me with the tennis ball launcher is the risk of the plastic air reservoir exploding..." - which is why I always put on safety goggles when using mine. 73, Tom G3OLB _ Searchable Archives: http://www.contesting.com/_topband

Re: Topband: RFI on TB

antennas, BOGs, short beverages, K1FZ beverages running into neighbors yards, hi-z verticals, NCC-2’s, with no end in sight. Somehow working stations like VI9NI on 160 at sunrise with no other callers make it all worthwhile! Good Luck Tom W1TC > On Jul 24, 2019, at 5:34 PM, Mark - N5OT wr

Topband: 160 conditions

Outstanding sunrise conditions at 0800 today on top band. FM5BH on 1818 KHz S9+. ZL3IX on 1826.5 long path peaking S8/9 on my meter. RBN skimmers showing excellent path to USA but very little other activity. Come on guys, turn that computer off and plug the key in! 73, Tom G3OLB

Re: Topband: ARRL DXCC - 160 Meters

Neither of those calls show up in my log on any band. Tom - VE3CX On Fri, Nov 16, 2018 at 7:33 PM Bob W4DR wrote: > OK1YQ is actually OK1RD > > -Original Message- > From: donov...@starpower.net > Sent: Friday, November 16, 2018 7:06 PM > To: topband > Subject: R

Topband: Poor conditions in 2018??

, with the exception of a couple of big signals from AZ and AB. US activity is not particularly good at our sunrise, probably explained by most folks needing 8 hours sleep! 73, Tom G3OLB _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Topband: 160m Parasitic array (VE6WZ_Steve)

Fascinating presentation Steve, thank you. Tom G3OLB _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: VP6D

Hover the cursor over the checkmark in the matrix of bands/modes in the log page, and often the operator will be identified On Tue, 2018-10-23 at 07:26 +0200, Jean-Paul Albert via Topband wrote: > ZL3CW, aka F2CW was, maybe,the operator. > congrat’s for ur QSO. > F6FYA > > Envoyé de mon iPad

Topband: Topband conditions

A couple of hours this morning on 160 CW yielded FR4NT, VE6WZ and ZL3IX as well as some other old friends, so considering the high static levels, conditions are pretty good! 73, Tom G3OLB _ Topband Reflector Archives - http://www.contesting.com/_topband

Topband: Capacitive vs. Inductive Matching of Inverted 'L'/'T'

is it called a 'hairpin' inductor? Looks nothing like a hairpin, or does it? 73, Tom G3OLB _ Topband Reflector Archives - http://www.contesting.com/_topband

Topband: Air wound coil

all rated at 6.3KV and available (over here) from CPC at less than $4 for 10. Antenna is slightly longer than a quarter wave so it is inductive and the capacitors form the other part of the L-match network. 73, Tom G3OLB _ Topband Reflector Archives - http://www.contesting.com

Topband: Top band sloper resonance

of the network is made by lengthening the antenna a little. I have a parallel high voltage ceramic capacitor from the feed point to radials. I can’t check the actual values because I’m currently on vacation in W4 land. 73, Tom G3OLB Sent from my iPhone _ Topband Reflector Archives - http

Re: Topband: NEW CALL for WA8WZG

, a notice of "dismissal" ,,,, go figure,,, Tom N7GP 73's Tom -Original Message- From: Rob Atkinson Sender: "Topband" Date: Wed, 11 Jul 2018 10:23:16 To: Subject: Re: Topband: NEW CALL for WA8WZG >Finally I get an email from the FCC this morning , I wo

Re: Topband: NEW CALL for WA8WZG

Yes !!! I am up to the task, really strange part is am fairly close to the super station,, here in AZ,, less than 80 air miles,,, Tom N7GP --Original Message-- From: Mike - W5JR To: Wa8wzg Cc: TopBand Subject: Re: Topband: NEW CALL for WA8WZG Sent: Jul 10, 2018 8:59 PM Congrats, Tom

Topband: Wednesday activity night

Roger G3YRO – conditions haven’t been all bad on 160 lately. ZL3IX and I have had 7 good long path QSOs in this month so far. 73, Tom G3OLB Sent from Mail for Windows 10 _ Topband Reflector Archives - http://www.contesting.com/_topband

Topband: 160 activity night

Sorry guys, I thought I posted the following about a month ago. Must be a long delay echo on the 160 reflector! Tom G3OLB Just to say that I wholeheartedly endorse Roger's comments on repeat 160 metre contacts. We are not all certificate hunters and many are only too happy to rag-chew. In 58

Topband: 160m DX Activity Night

climb out of the sack at Z or 0300Z on a Wednesday though Roger! 73, Tom G3OLB _ Topband Reflector Archives - http://www.contesting.com/_topband

Topband: D10 Field Telephone Cable

Vic/David – looks like D10 field telephone cable may be readily available at: http://armyradio.com/800-Meters-DON-10-WD1-TT-D-10-Twisted-Pair-Telephone-Cable.html GBP 64.50 for 800 metres sound a pretty reasonable price to me. 73, Tom G3OLB _ Topband Reflector Archives - http

Re: Topband: FT8 qrm

of the available usable band - possibly more. Some DX cannot operate below 1805 or higher, which makes the band that much smaller, and that 2.5 Khz starts to represent an even bigger chuck of prime spectrum. For FT-8 users expecting a QRM experience this weekend, I wish them well... Tom - VE3CX On Wed, Nov 29

Topband: Conditions improving

Really good to hear 160 conditions getting better by the day! Greg ZL3IX was peaking 569 running only 50 watts on long path at my sunrise today. Forget the digital modes and start bashing that key! 73, Tom G3OLB _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Solar eclipse and 160m propagation.

At 06:48 AM 7/5/2017, CT1EKD wrote: >Hi Topbanders >In 21th August we will have a solar eclipse... Do you know any >studies about propagation at eclipses, before, during and after ? Pedro - Here's a place to start. http://hamsci.org/

Topband: Dayton Crown plaza rooms

To All.. I am looking for anyone with room at the Crown Plaza Dayton for Friday and Saturday night May 19 and 20th that they may not use,, if anyone has a room that they don't need . Now or as Dayton gets closer, please email me at wa8...@wa8wzg.net ,,, I will take it! Thanks Tom Wa8wzg 73

Topband: Jeff's Book

Just to say I received my copy of Jeff's 'DXing on the edge' today, complete with 19 chapters, bought from 'Book Depository' via Amazon. Price including shipping was GBP 15.26. Now for some interesting reading! 73, Tom G3OLB _ Topband Reflector Archives - http://www.contesting.com

Re: Topband: Dx'ing on the Edge - Numbered and Signed Copies Now Available fro US Topbanders

Hi Jeff You are right - shipping is more than the book... Will you be offering signed copies at Dayton per chance? My plan was to pick up a copy there. All the best in the New Year! Tom - VE3CX On Thu, Dec 29, 2016 at 9:41 AM, k1zm--- via Topband <topband@contesting.com > wrote: >

Re: Topband: ARRL 160

this scenario. Another option would be to bust the other guys call (on purpose) in your log. You take an extra "hit" - you loose the QSO, plus penalty, but it gets the job done if that is the intent. Tom - VE3CX On Mon, Dec 5, 2016 at 2:55 PM, W0MU Mike Fatchett <w...@w0mu.com&g

Topband: 160 M Inverted 'L'

for some ten years at significant power levels without any failures. 73, Tom G3OLB _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: 80-160M remote autotuner needed (Mike DeChristopher)

Mike, I just can’t figure out why you would use 807s in a remote tuner! 73, Tom G3OLB _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: VK0EK confirmation

of emails to work through, so be patient. They are a first-class operation, and I am sure once the issue is resolved, your much anticipated confirmation will follow :-) Tom - VE3CX On Mon, Apr 18, 2016 at 5:56 AM, Andrzej_SP6AEG <andrzej_...@interia.pl> wrote: > Courtesy of

Re: Topband: CW160

One small request would be to NOT mention callsigns - at least during the 5 day "waiting period" for log submissions to be completed. Some folks may not be running assisted, may bust the odd call or two, or whatever. No point in giving out corrected callsigns at this point. Thanks T

Re: Topband: CW160

of the "easy" Q's are out of the way, and you should have better luck in the pileups, now that they should be thinned out a bit. Last, but not least - QRP has to be tough in any contest. 160 especially so. But - if it wasn't a challenge, folks would not be doing it. Tom - VE3

Re: Topband: CQ 160 CW Contest

. It is only available to SOA(HP), but it will be interesting to see what the final outcome is. Tom - VE3CX On Wed, Jan 27, 2016 at 2:27 PM, Jorge Diez - CX6VM <cx6vm.jo...@gmail.com> wrote: > Hello, > > Just reading the rules, don`t like this, how they can control it? > > A new r

Re: Topband: VP8STI Humor, Design engineer trauma

ou tonight for another round!! 73's Tom -Original Message- From: Lee STRAHAN <k7...@msn.com> Sender: "Topband" <topband-boun...@contesting.com> Date: Sat, 23 Jan 2016 18:56:05 To: '160'<topband@contesting.com> Subject: Topband: VP8STI Humor, Design engineer t

Re: Topband: VP8STI last night in Oregon

great except Vp8!! Congrats to all that have worked them and maybe tonite the propagation gods will shine west!!! 73's Tom -Original Message- From: Tree <t...@kkn.net> Sender: "Topband" <topband-boun...@contesting.com> Date: Fri, 22 Jan 2016 06:57:33 To: 160&

Re: Topband: Ethics and the Individual

You conveniently clipped off the part where I said "as long as it hurts no one else". Don't play stupid games with me by rewording what I say and posting it in public to make it look like I said something I did not. Also, don't lecture me about ethics after that stunt. - Original

Re: Topband: strange propagation

eneous Clustering. This is where groups of people cluster together and invent their own reality, feed off each other's emotions, and dismiss anyone outside their group as a problem and dishonest. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: strange propagation

y the ARRL with yank DXCC's from people who have worked DX from more than one location, so the best approach would be a new DXCC with all contacts allowed from one location, where it is the licensee's station and operating. 73 Tom _ Topband Reflector Archives - http://www.cont

Re: Topband: strange propagation

used to be higher than average intelligence, develop homogeneous clustering. It looks like that is happening. Next thing you know, the false memes and quotes will start. :) 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: strange propagation

ng unhappy with not being in charge of everyone else. They don't want the problem fixed, because then they would have nothing to get all stirred up about. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Topband: FCC regulations circa 1960's

had to be licensed, but what was the identifier when using another Ham's station who had lower license class but a station license assigned to that address? 73 Tom unless Stew's class allowed operation outside that station license class. Then it would have been both calls, but I can't recall

Re: Topband: Strange propagation

ar as I'm concerned, that was the end of DXCC meaning very much. I wrote and complained. Now it is what it is. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: 4 square

Used both the 4 square and 8 circle array by DX Engineering. Both work but, in my thunderstorm environment, I spent many hours and as many dollars as the systems originally cost repairing them over three seasons. This is despite keeping the systems powered off, except when being used. The guys

Re: Topband: RE; Ground screen Question

right under the floor joists. They used heating ducts, fences, water pipes, and everything else they could. The more they used, the stronger they got. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Received Signal Strengths

Typically, on 160M, I leave the preamp off for my beverages. The received noise floor for my N/S beverage (on CW) is usually S2 - 3 and for my phased EU beverages is S0 to S1. I have found the signal strengths of the received stations to be 1 to 2 S units down on the beverage and equal or

Re: Topband: Received Signal Strengths

marks on a rubber band. Great analogy Tom.If I were truthful with the signal reports for most of the topband DX worked here, using the S-meter with RX loops, I would be sending "209". I don't know how to really express it, but our S meters have index marks that say the

Re: Topband: Stew Beef

to a DQ for not following the rules... Tom - VE3CX On Fri, Jan 8, 2016 at 10:06 AM, Doug Renwick <ve...@sasktel.net> wrote: > What I often do during a phone contest exchange is omit the signal report > and only give out the section, serial number, etc. Very few operato

Topband: W1BB (NOT K1BB, whoever that is)

he area between 1600-1800 kc/s, I used to listen to the Cincinatti police at night on an opened up AM BC receiver around year 1960. The Great Lakes was also full of radio navigation transmitters in the area below 1800 and above the upper end of the AM band at 1600 kc/s. 73 Tom ___

Re: Topband: Using shielded CAT5 data cable as feedline foractive antenna; benefits of multi-turn K9AY loop/SAL/etc?

Sounds like you, Tom, and LZ1AQ are saying the same: in order for loops to be effective (low SNR and high signal levels), they must have large area and low reactance (inductance to be exact). Parallel loops or fat conduits increase the signal levels, while the CP configuration and other

Re: Topband: Using shielded CAT5 data cable as feedline for active antenna; benefits of multi-turn K9AY loop/SAL/etc?

increases, because signal and noise from the antenna would increase at the same rate. It just means the level of signal and noise from the antenna is a bit higher. If receive amplifier or system internal noise is helping set noise floor, then it would help S/N. 73 Tom _

Re: Topband: vbog?

Has anyone tried a v-beam configuration on the ground, similar to a bog? Obviously, it would be longer. The intent would be to increase RDF. Or would that be a waste of time? Waste of time to increase directivity. Long wires laid on or near the ground fire straight down the length of a

Re: Topband: Commercial Antennas

My Ten Tec 238B L-Network tuner works well at 1500W. Some tuner networks, especially T-networks, can have very high currents through the shunt inductor. The largest issue with T tuners is capacitor value. Most tuners use generic 230-270 pF maximum capacitance caps, and that makes the

Re: Topband: beverage resistors at Mouser.com

If you are going to make the order, consider using several in parallel to improve the surge handling capability. I use 6x 2700 ohms here. 73/jeff/ac0c Be real careful with the resistor choice. A metal oxide or film resistor handles many times less surge than an OX or OY resistor. OX and OY

Re: Topband: Beverage Crow's Foot Ground Wire Pattern

What is the recommended pattern for the crow’s foot ground wires at each end of a two-wire reversible Beverage? Should ALL the ground wires be in the 180 degree plane behind the Beverage wire, or does it make any difference? I don’t imagine it’s a very good idea to put a ground wire under,

Re: Topband: re topband QRP

d be doing, punishing others. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: QRPers calling CQ in the SP ?

Of course, any frequency ending in a zero is almost guaranteed to have a constant broadcast station harmonic. I almost always hear them here, especially at night. And very often, that BC carrier is stronger than stations zero-beat with them calling CQ! Better to be slightly off of zero, if

Re: Topband: re topband QRP

will either just ignore a station signing nonsense or be confused by it. There is nothing more frustrating than trying to dig out a callsign or complete a contact with unnecessary meaningless stuff tacked on. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: SB-1000

and appear to be less expensive. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: SB-1000

If you can't find the exact value of 170pf the ceramic 5KV door knobs at 200pf will work. Better yet even a couple of 500pf door knobs in series will give you 250 pf which will just mean a little less on your variable will tune. Another common ceramic door knob value is 500pf and three in

Re: Topband: SB-1000

Both are N750 types. You need a #6 lug, a short #6 screw (3/16th long), and some #16 bus wire plus a brass washer that Ameritron will have. The chokes come from Ameritron no matter where you buy them. Thanks Tom,Re. the lug, screw and wire, I'm assuming the capacitor I ordered from them

Re: Topband: Heathkit SB-1000

Good point Tom, beginning with too little drive would require more load C than is available. That and the brass washer should be installed also. Hi Lou, The anti-corona washer was not in the SB1000 or early AL80A. It should be added if a user might happen to mistune. But I'd like

Re: Topband: 160m LP to LP DX contacts in 2015

has made the spread in performance difference between locations much greater. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: SB-1000

Just came off 20M, amp working fine. Went to 160 plate and load controls have no control, no output. Plate current climbs high with any added drive (45-50W) and blew both 10amp fuses.Off comes the cover.jimk2hn _ It might be something else, but I would bet the contact on the

Re: Topband: SB-1000

Thanks to all. I will go over it again today. I initially started out on 160 and then moved on to other bands. On 160 I could not get any increase in grid current, it came up but no increase with plate tuning but may not have applied enough drive. Staying below the 200ma grid and 400ma plate

Re: Topband: Weatherproofing F-type connectors

Apply some silicone dielectric compound (non-hardening silicone "grease") to the coax center conductor. That will keep moisture out and prevent corrosion. This actually belongs anyplace anything is threaded or clamped. It will displace from pressure and allow a connection, but it seal the

Re: Topband: QRP

I have been puzzled with this question for a long time... Given the progress on antenna and Rx-capabilities (over the years) and say typical transceiver output power (100W), how come it has become so rare to witness (experience) low power to low power QSO's (over the USA to EU path) during

Re: Topband: 4SQ around tower

I am in the process of clearing land for full size 80m 4SQ. I have two questions for the group: 1) How much and what kind of degradation should I see if I place the 4SQ elements around my tower. The tower is 90' and has a 4 el 40 m yagi at 90' and 6 el tribander at 105'. Currently I have no

Re: Topband: 4SQ around tower

quot; the tower. The thinner the tower, the better this works. Stick something else on the tower, and it all can change. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: ON4KST low band chat

Thanks, but that doesn't fix the 40m clutter in the ON4KST lowband chat. That's what I meant. For me, adding 40m to the chat simply ruined it. I'd be willing to pay to have it work like it used to, just 160 and 80. 40 meters is more like 20 meters than a low band. From this part of the USA,

Re: Topband: DX on 160, was: Topband QRP WAS

is not a vertical on 160, then as you know it will be an even bigger challenge to work DX on TopBand. Actually that is exactly backwards, Mark. Dipoles are narrower than 1/4 wave verticals, all things equal. This is because a 1/4 wave vertical has half the resonant length. 73 Tom

Re: Topband: 2 wl loop, worth the effort?

You are misinterpreting the model data by looking at the shape of the pattern rather than the relative strength of the pattern at angles of interest. Example -- the so-called "take off angle" simply shows the vertical angle where the signal is the strongest. FAR more important to look at the

Re: Topband: 2 wl loop, worth the effort?

You said "Compared to a vertical, there could be 10-30 dB difference in favor of a low dipole (less than 150 ft high) within a few hundred miles.", and I was pretty much trying to make the same point but indirectly since I don't have a dipole on 160 meters. The original poster mentioned

Re: Topband: 1/2 wl verticals and spaving

I'm glad to hear that it's that simple. I used the same principle when the verticals were dedicated to 40M and were 1/4wl tall where I fed them with 3/4wl and 5/4wl coaxial runs. The gain and side nulls were impressive.>>> Carl, This is real simple to handle. With a 1/4 wave or odd 1/4

Re: Topband: Diversity-capable transceivers

Barry, It is more than just second receiver quality. For maximum diversity effect, the receivers must use a common time base for both channels. They do not have to be phase synced (unless blended into mono), a person's brain will learn around that. The channels should not drift phase when on

Re: Topband: fixing beverage

years. I can find and fix any cable system for HF with a cheap common SWR analyzer, and so can anyone else. I can sit in my house and find a bad connection 1000 feet away by sweeping the SWR between 1.8 and 5 MHz, and get within a foot, and not spend $500 on equipment. 73 Tom

Re: Topband: fixing beverage

There are multiple ways to do TDR. I like the way that this unit does it -- an inverse FFT of a frequency sweep. http://sdr-kits.net/VNWA3_Description.html To expose small perturbations in the feedline or system, make the sweep at VHF/UHF. To see only the more gross defects, sweep from about

Re: Topband: fixing beverage

I agree with Mike, check the ground connection at the Beverage feed point. 73 Tom W1TO On 11/23/2015 10:26 AM, Mike Waters wrote: Not necessarily. I've seen a poor ground cause low signal levels. 73, Mike www.w0btu.com On Mon, Nov 23, 2015 at 8:21 AM, Jorge Diez - CX6VM <cx6vm

Re: Topband: fixing beverage

. I can do this with a low power VFO and a diode detector or scope. It does not even have to be a bridge. :) 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: fixing beverage

or impedance will allow you to calculate exactly where the problem is. The MFJ analyzer will do this within a few feet, even on a 1000 foot cable, by using distance to fault. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Mag loop 400W if possible.

Loss is I squared R. as the current is lowered then loss drops rapidly. That isn't true. Loss as a percentage or as a ratio to applied power is exactly the same in a linear system. 6 dB loss is 6 dB loss whether at 1 milliwatt or 1 megawatt. _ Topband Reflector Archives -

Re: Topband: Mag loop 400W if possible.

esistances and how well current and voltages are balanced in the loop, especially in relationship to the feedline and any mast. 73 Tom - Original Message - From: "jonathan white" <jonathan.whit...@btinternet.com> To: <TOPBAND@contesting.com> Sent: Sunday, N

Re: Topband: RX PREAMPS

it. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Mag loop 400W if possible.

His 400W TX power will likely be ~10 watts ERP if he does a good job on construction. 390W will be nothing but heat. :) - Original Message - From: "Barry N1EU" To: "topBand List" Sent: Sunday, November 15, 2015 8:59 AM Subject: Re:

Re: Topband: Why do rodents eat coax?

Squirrels and rats can be a problem, but mostly my cable chew issues have been from raccoons. I used to trap them and deport them a few miles. Now I just I bury my cables. Even a few inches of dirt is enough. Where they come up out of ground, I sleeve them with cheap plastic sprinkler pipe.

Re: Topband: Fwd: BCB Interference

port are not linear with padding. If you can't hear a significant change with 10-20dB attenuation, the mixing is probably not receiver side of the attenuation. Before throwing too many bypasses or filters at things, I'd try to get some idea what it is. 73 Tom _ Topband

Re: Topband: 160m & 80m RFI issues requesting ideas for ANC4 senseantenna to cancell out local noise

Does the SNR of the targeted noise source vs. other signals on the sense antenna, matter in this application? To null a particular noise, you want the noise antenna to have the highest unwanted noise pick up possible and the least amount of signal or other background noises. If the noise

Re: Topband: 160m & 80m RFI issues requesting ideas for ANC4 senseantenna to cancell out local noise

ground rod as a ground, and decouple the coax near the sense antenna. A simple J310 source follower amplifier on a 102 inch whip would have a ton of signal level. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: RFI - and lots of it (negative fuse)

holder for me, and no negative battery post connections for me. My three wire plug shack power supplies have all been modified now, and no longer have a ground loop from mains or station ground to the negative power lead. The UK standards have it correct. 73 Tom _ Topband Refle

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