Topband: FT-8 question

Folks on FT-8 use a 2.5 khz ssb wide RX filter.FT-8 is supposed to be good for 20 db below the noise floor. I assume that means 20 db below the noise floor of the 2.5 khz RX filter ? But a 250 hz cw filter would drop the noise floor by 10 db... vs the 2.5 khz wider filter... if CW mode

Topband: Niceties

Date: Wed, 20 Dec 2017 00:19:45 -0500 From: Nick Maslon - K1NZ To: topband@contesting.com Subject: Topband: Niceties http://www.contesting.com/_topband

Topband: cutting coax stubs for 80 meter 4-square

Date: Sun, 10 Jun 2018 22:28:11 +0800 From: Jeff Blaine To: topband@contesting.com Subject: Re: Topband: cutting coax stubs for 80 meter 4-square http://www.contesting.com/_topband

Topband: Baker Island DXpedition on 160

Date: Tue, 12 Jun 2018 14:17:43 -0400 From: GEORGE WALLNER To: David Cutter , David Cutter via Topband , "'Roger Kennedy'" Subject: Topband: Baker Island DXpedition on 160 >Hello TopBanders, >KH1/KH7Z will be active on 160 from Baker Island from June 27 to July 6 >(note that dates are

Topband: cutting coax stubs for 80 meter 4-square

Date: Mon, 11 Jun 2018 07:29:39 -0700 From: "Richard (Rick) Karlquist" To: terry burge , topband@contesting.com Subject: Re: Topband: cutting coax stubs for 80 meter 4-square On 6/10/2018 8:01 PM, terry burge wrote: > All's well that ends well I'm happy to report. K2AV, Guy suggested I check >

Topband: Detuning Relay Flyback Diode

Date: Sat, 23 Dec 2017 10:51:57 -0500 From: Brad Denison To: topband@contesting.com Subject: Topband: Detuning Relay Flyback Diode http://w1nt.com> ## I call em back emf diodes.Use a single 1N5408 or 6A10 diode, reverse connected across the 12 vdc winding. Heres

Topband: sdrWEB not going in my log

Date: Tue, 16 Jan 2018 22:41:05 +0800 From: Jeff Blaine To: topband@contesting.com Subject: Re: Topband: sdrWEB not going in my log http://www.contesting.com/_topband

Re: Topband: VU2GSM webSDR use: A Clarification

Date: Tue, 16 Jan 2018 08:17:41 -0500 From: "Joe Giacobello, K2XX" To: a Topband COL Cc: VE6WZ_Steve , Ron Spencer , k...@dxer.com Subject: Topband: Fwd: Re: VU2GSM webSDR use: A Clarification

Topband: Kostas' point

Date: Wed, 17 Jan 2018 15:07:04 -0500 From: To: "John Randall" , Cc: "MEZEY JIM" , "w1zc" , "W2WGK" Subject: Re: Topband: Kostas' point

Topband: VU2GSM webSDR use

Date: Sun, 14 Jan 2018 15:48:04 + From: Paul Mclaren To: topband@contesting.com Subject: Re: Topband: VU2GSM webSDR use http://www.contesting.com/_topband

Topband: FCC authorizes 1KW wireless power transmission

Date: Tue, 6 Feb 2018 14:16:15 -0500 (EST) From: donov...@starpower.net To: topband Subject: Topband: FCC authorizes 1KW wireless power transmission experimental station WJ2XGB on 160 meter band

Topband: FCC authorizes 1KW wireless power transmission

Date: Mon, 12 Feb 2018 16:35:53 -0500 From: Brian Pease To: topband@contesting.com Subject: Re: Topband: FCC authorizes 1KW wireless power transmission ### With only 1 KW ERP, they are not about to put the local power companies vast outside plant of poles, HV

Topband: OT - US Hams, WWV closure

Date: Tue, 21 Aug 2018 22:49:49 -0400 From: "Paul Christensen" To: Subject: Re: Topband: OT - US Hams, WWV closure http://www.contesting.com/_topband

Topband: OT - US Hams, WWV closure

Date: Mon, 20 Aug 2018 03:17:57 + From: Charles Moizeau To: "k...@radioprism.com" , Topband Subject: Re: Topband: OT - US Hams, WWV closure ## David does not ..get it. WWV et all is both a Time AND Freq station.I use the 20 mhz WWV to align the TCXOs in all 4 of my yaesu

Topband: Air Wound Coil

Date: Thu, 30 Aug 2018 07:44:04 +0100 (IST) From: MR TREVOR DUNNE To: ''topband List' Subject: Topband: Air Wound Coil http://www.mfjenterprises.com/Product.php?productid=404-0669 I've had one on order from MFJ via a UK company for 4 months now and no sign of it, I want to build a at

Re: Topband: RE topband Leaving

Date: Wed, 5 Sep 2018 06:13:21 -0400 From: Mark K3MSB To: Mike Waters Cc: ad4hk2...@yahoo.com, topband , Tree Subject: Re: Topband: RE topband Leaving http://www.contesting.com/_topband

Re: Topband: Air Wound Coil

-Original Message- From: Richard (Rick) Karlquist Sent: Thursday, August 30, 2018 5:44 PM To: Guy Olinger K2AV ; Jim Thomson Cc: TopBand List Subject: Re: Topband: Air Wound Coil On 8/30/2018 3:44 PM, Guy Olinger K2AV wrote: You can also get the edge-wound (flat) 1/4 inch by 1/16

Topband: KH1/KH7Z TopBand Ops Brief

Date: Thu, 12 Jul 2018 22:19:07 -0400 From: GEORGE WALLNER To: , ha...@tomisat.com Subject: Topband: KH1/KH7Z TopBand Ops Brief http://www.contesting.com/_topband

Topband: KH1/KH7Z TopBand Ops Brief

Date: Fri, 13 Jul 2018 10:23:19 +0300 From: uy0zg To: GEORGE WALLNER Cc: topband@contesting.com, ha...@tomisat.com Subject: Re: Topband: KH1/KH7Z TopBand Ops Brief "> and Ukrainian stations also logged. (Remember, this was in July!)" >Hi George ! >UY5VA and US4EX - tven in winter and summer

Re: Topband: 160M Balun

Message- From: Peter Voelpel Sent: Friday, March 30, 2018 9:47 AM To: 'Jim Thomson' ; topband@contesting.com Subject: RE: Topband: 160M Balun Why do you want it resonant? 73 Peter -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Jim Thomson

Topband: 160M Balun

Date: Fri, 30 Mar 2018 07:22:18 -0400 From: "N2TK, Tony" To: Subject: Topband: 160M Balun http://www.contesting.com/_topband

Re: Topband: 160m polarization and elevation angles

Date: Sun, 1 Apr 2018 00:23:15 -0400 (EDT) From: donov...@starpower.net To: topband@contesting.com Subject: Re: Topband: 160m polarization and elevation angles www.arrl.org/news/storm-takes-down-amateur-radio-contest-club-towers-in-northern-europe ## Per the OH8X current website, they still

Re: Topband: 160m polarization and elevation angles

Date: Sat, 31 Mar 2018 23:15:00 +0800 From: "Steve Ireland" To: Subject: Re: Topband: 160m polarisation and elevation angles http://www.contesting.com/_topband

Re: Topband: Air Wound Coil

-Original Message- From: Richard (Rick) Karlquist Sent: Friday, August 31, 2018 7:13 AM To: Jim Thomson ; Guy Olinger K2AV Cc: TopBand List Subject: Re: Topband: Air Wound Coil ## What are you using to measure Q ?? I did discover one anomoly with coils and Q. XL increases

Topband: Detuning TX ant + QSK

For you folks that have to de-tune your TX ant, so your dedicated RX ant works correctly, if you also operate qsk, how do you do it ? Are you using a sped up vac relay to de-tune the TX ant ? I don’t see any other way to accomplish that task. Or do you use vox cw ? Jim VE7RF

Topband: Rather use N-type (was Re: The answer to PL-259

Date: Fri, 7 Dec 2018 15:05:28 -0500 (EST) From: donov...@starpower.net To: topband@contesting.com Subject: Re: Topband: Rather use N-type (was Re: The answer to PL-259 soldering/reliability problems) http://www.contesting.com/_topband - Topband Reflector

Re: Topband: Rather use N-type (was Re: The answer to PL-259

Date: Sat, 8 Dec 2018 11:57:07 -0800 From: "Richard (Rick) Karlquist" To: terry burge , j...@johnjeanantiqueradio.com, topband@contesting.com http://www.contesting.com/_topband - Topband Reflector

Topband: ARRL DXCC - 160 Meters

Date: Wed, 21 Nov 2018 09:32:20 -0600 From: "Mike Cizek W0VTT" To: "'Jean-Paul Albert'" , Subject: Re: Topband: ARRL DXCC - 160 Meters <9. Station Location and Boundary: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: Detuning TX ant + QSK

version of the GH-1. Jim VE7RF -Original Message- From: Richard (Rick) Karlquist Sent: Wednesday, November 28, 2018 7:02 AM To: jkaufm...@alum.mit.edu ; 'Jim Thomson' ; 'TopBand List' Subject: Re: Topband: Detuning TX ant + QSK On 11/28/2018 5:18 AM, John Kaufmann wrote: Jim, I use

Re: Topband: Radial wire

Date: Wed, 5 Sep 2018 15:27:35 -0500 From: Rob Atkinson To: topband@contesting.com Subject: Re: Topband: Radial wire http://www.contesting.com/_topband

Topband: alternative to shunt fed tower

Date: Sun, 16 Sep 2018 17:03:03 + (UTC) From: N7DF To: TopBand List Subject: Topband: alternative to shunt fed tower http://www.contesting.com/_topband

Re: Topband: CQ 160

Date: Tue, 29 Jan 2019 21:12:43 -0400 From: "Mike Smith VE9AA" To: Subject: Re: Topband: CQ 160 http://www.contesting.com/_topband - Topband Reflector

Topband: spark gap construction ideas for 160m tower

Date: Sun, 6 Oct 2019 19:08:17 -0500 From: Rob Atkinson To: topband@contesting.com Subject: Re: Topband: spark gap construction ideas for 160m tower https://www.radioworld.com/tech-and-gear/understanding-arc-gaps-for-am-systems https://www.thebdr.net/articles/steel/twrs/LimitingStatic.pdf

Topband: Coil 3.77 software

Coil 3.77 is now available replaces coil 3.72 http://ham-radio.com/k6sti/coil.zip Jim VE7RF _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Topband: Measuring Common Mode Chokes

Date: Wed, 18 Dec 2019 23:46:56 + From: Chuck Hutton To: "topband@contesting.com" Subject: Topband: Measuring Common Mode Chokes https://www.mfjenterprises.com/Product.php?productid=MFJ-854 Switchable In 5 ranges. Jim VE7RF _ Searchable Archives:

Topband: Dacron & varmits

Date: Tue, 18 Feb 2020 08:04:55 -0800 From: Grant Saviers To: topband@contesting.com Subject: Re: Topband: Dacron & varmits http://synthetictextilesinc.com/supportham.html https://www.kf7p.com/KF7P/Welcome.html is one helluva lot stronger than the textile industries version. And a

Topband: FT-8 Contest would be great for Topband

Date: Fri, 10 Jan 2020 14:38:03 -0400 From: Herbert Schoenbohm To: TopBand List , topband-ow...@contesting.com Subject: Topband: FT-8 Contest would be great for Topband http://www.contesting.com/_topband - Topband Reflector

Topband: Topband resource

Date: Wed, 15 Jan 2020 15:58:57 + (UTC) From: Roger Parsons To: topband@contesting.com Subject: Re: Topband: Topband resource http://www.contesting.com/_topband - Topband Reflector

Re: Topband: Hi Z amplifiers for 160m

Date: Thu, 12 Mar 2020 20:25:16 -0700 From: Jim Brown To: topband@contesting.com Subject: Re: Topband: Hi Z amplifiers for 160m http://www.contesting.com/_topband - Topband Reflector

Topband: New Orange thread locker

Strength of red thread locker...but the ease of removal, of blue thread locker. This may well be the ultimate solution for some applications involving high vibration. Made by Permatex.

Topband: Fw: Some experiments with a short beverage, not

Date: Tue, 30 Jun 2020 14:12:20 -0500 From: Cecil To: Mark Lunday Cc: "topband@contesting.com" Subject: Re: Topband: Some experiments with a short beverage, not succeeding very well http://www.contesting.com/_topband - Topband Reflector

Topband: CQ Zones

You folks using CW have a HUGE advantage over the SSB operator. And folks using a remote RX have a bigger advantage over everybody. And hams, who live on 5-10 acres out in the bushhave a huge advantage over us mere mortals on postage stamp sized city lots, surrounded by noise in all