Re: Topband: MFJ Noise Canceller 1026/1025

Try this one: http://www.pa0sim.nl/Phaser%2080%20-%2010%20meters.htm Of course, the design is NOT limited to 80m. Excellent results produced the BN73-202 binoculars for T1-T4 (2 turns where the schematic requires 4 uH, 4 turns for 16 u). Not tested the amp with small signal bipolars, used my

Re: Topband: LOTW Participation

I love the LoTW. QSL bureau is in some countries misused to press hams into forced membership of their national ham radio organization. AFAIK it is here in OK and also in DL... LoTW is then the only way to confirm a large number of QSOs. If somebody has 100 000 QSL cards or more, he would

Topband: VE3DO Loop

A detailed analysis of the VE3DO Loop is on my web site: http://www.ok1rr.com/index.php/antennas/8-the-ve3do-receiving-loop A NEC file for further investigation is available via email upon request. 73 Martin, OK1RR _ Topband Reflector

Re: Topband: Rig Question

Dne 19.6.2014 21:00, Mike Waters napsal(a): Is anyone here controlling their Elecraft K3, etc. with their PC? 73, Mike www.w0btu.com Yes, I do. Everything in Linux supporting Hamlib/rigctld via UDP port is a good choice. The Linux clone of TR log (by W9CF) works well (choose K2 as your

Re: Topband: Binocular Cores

Is somewhere available a list of ferrite mixes indicating the frequency where R=X? 73, Martin, OK1RR Dne 1.6.2015 v 17:31 Tom W8JI napsal(a): You really need to do a single loop through the core windows and measure the impedance with some sort of analyzer. Even an MFJ259B with a short

Re: Topband: rx preamps

and make another one? Jim WA3MEJ - Original Message - Message: 10 Date: Fri, 28 Aug 2015 23:53:10 +0200 From: Martin Kratoska mar...@centrum.cz To: topband@contesting.com Subject: Topband: W7IUV preamp Message-ID: 55e0d846.3070...@centrum.cz Content-Type: text/plain; charset=windows-1252

Re: Topband: KD9SV-OK1RR relays ???

Hi Douglas, I am sorry to tell you that none of the relays you have is good for the front end saver. They are usual small signal relays but a reed relay should be used. The most important thing is not the capacitance (assumed that the front end saver is used on 160, 80 and possibly 40 m), but

Re: Topband: KD9SV-OK1RR relays ??? (RX Front End Protector)

Array Solutions offers a 'RX Front End Protector' based on back-to-back 1N4148 diodes. Schematic: http://www.ok1rr.com/public/rxfep.png more details: http://www.arraysolutions.com/Products/as_rxfep.htm manual (also pictures of clipping etc.)

Re: Topband: KD9SV-OK1RR relays ???

It is here: http://www.somis.org/ 73, Martin, OK1RR Dne 30.8.2015 v 16:32 Larry napsal(a): Measures (K6???) did a relay speed-up scheme for QSK on an SB220, I don't remember the details but it was something like hitting the relay with higher than usual coil voltage/current and it shortened up

Topband: W7IUV preamp

The latest version 6 http://www.okdxf.eu/files/preamp_r60.pdf 73, Martin, OK1RR _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Handheld Impedance Analyzer

Try SARK-110 http://www.sark110.com/home beats others mostly hands down. 73, Martin, OK1RR Dne 27.3.2016 v 21:08 dick.bingham napsal(a): Greetings All I am getting fed up with multiple trips between new antenna matching stations and the tx-source/VSWR and not converging on a good match in

Topband: PA0SIM Noise Canceller - info wanted

Hello Topbanders, has somebody any useful, real life experience with the PA0SIM's noise canceller (phaser)? http://www.pa0sim.nl/Phaser%2080%20-%2010%20meters.htm I would be interested especially on any info about gain variations while turning the differential capacitor. Many thanks! 73,

Re: Topband: IARU HF Championship 2017 - Multiplier list of HQ stations

CRC (OK) should be OL7HQ this year. 73, Martin, OK1RR Dne 8.6.2017 v 20:59 OZ0J Joe napsal(a): Dear all The IARU HF Championship Contest 2017 will take place in the weekend 8 and 9 July 2016. Together with Bob, N6TV I will create a multiplier file that fits to the contest log

Re: Topband: Any experience with 2N3553?

USD each single price in a push pull Norton configuration would in my opinion make it worth trying as a killer wideband amp. Just my $.02 USD. Lee K7TJR OR -Original Message- From: Topband On Behalf Of Martin Kratoska Sent: Sunday, July 1, 2018 9:51 AM To: topband@contesting.com Subj

Topband: Any experience with 2N3553?

The 2N3553 is a brutal 7 watt device in a TO-39 metal package. Chris Trask, N7ZMY mentioned some unparalleled IM characterics '... The BFQ19 (made by NXP née Philips) and the NE46134 (made by NEC) are both highly popular within the CATV industry, and are virtually identical in terms of

Re: Topband: Straws in the wind, continued or, "Where's the DX?"

Disagreed! A mode is matter of person, not software. 73, Martin, OK1RR Dne 2.4.2018 v 01:42 Joe Subich, W4TV napsal(a): On 4/1/2018 6:01 PM, cqtestk4xs--- via Topband wrote: Every mode other than FT-8 requires a person to tune in a station and to take part in the contact. 1) FT8 also

Re: Topband: 7Q7EI on 160

Let me hope that this is an exception and NOT a rule! CW is the DXer's primary mode! 73, Martin, OK1RR Dne 31.3.2018 v 18:46 wb6r...@mac.com napsal(a): 7Q7EI - no CW on 160 - only FT8 Info here: http://www.eudxf.eu/7q7ei-status-report/ GL - Steve

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

Harris uses BNCs at this power level (3CX-1500A7) in RF-353 (AM-7224) amplifier. They were used under harsh conditions for decades. 73, Martin, OK1RR Dne 08. 12. 18 v 3:07 Tim Duffy napsal(a): When you look at an N connector, specifically the center pin - remember that the N connector center

Re: Topband: Rather use N-type (was Re: The answer to PL-259 soldering/reliability problems)

Did he same. Since this change no problem anymore. Confirming what Greg says and can only recommend - throw away all PLs and go to N! 73, Martin, OK1RR Dne 06. 12. 18 v 5:00 Greg-zl3ix napsal(a): I continue to be mystified by the fact that the amateur radio community insists on using

Re: Topband: Recomended Relays

Some experience here: http://www.bavarian-contest-club.de/projects/misc_projects/hfrelais.txt 73, Martin, OK1RR Dne 06. 12. 18 v 17:40 Sam Josuweit napsal(a): Can anyone recommend a good general use relay for antenna switching in the 800-1000w power range? I know using power relays can be a

Re: Topband: W7LR

WooW, very impressive! Thanks for sharing! 73, Martin, OK1RR Dne 01. 12. 18 v 17:09 Hank Garretson napsal(a): I encourage you all to read W7LR QRZ page. Top Band Exuberantly, Hank, W6SX On Sat, Dec 1, 2018 at 8:01 AM Tree wrote: Many of you have probably noticed that W7LR has not been

Topband: CW operators - do you prefer QSK?

Please vote in this new poll. http://www.strawpoll.me/17426016 Many thanks! 73, Martin, OK1RR _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: VI9NI - Missed em.

Me too, regardless of the band. Anytime I tried to reach them they were on FT8, not on CW... 73, Martin, OK1RR Dne 15. 04. 19 v 5:09 FZ Bruce napsal(a): Sorry to hear you missed them. I also missed them as they were after my sunrise, the many days that I listened. 73Bruce-K1FZ

Re: Topband: 160

Gentlemen, stop this annoying practice, please! Not all are ARRL members! Thanks for understanding, 73 Martin, OK1RR Dne 03. 08. 19 v 20:20 donov...@starpower.net napsal(a): Hi Bob The "how to" article is right here: http://p1k.arrl.org/pubs_archive/63144 73 Frank W3LPL -

Re: Topband: Impressive demonstration of one dB of signal strength improvement

What QST? Would be a copy available? 73, Martin, OK1RR Dne 21. 08. 19 v 18:24 K9FD napsal(a): An excellent article is in an old QST called "station design for DX" It mentions that 1 DB improvement in the station will provide a whole new layer of DX signals.   Very true. In the average station

Re: Topband: DHDL

. 19 v 20:51 Martin Kratoska napsal(a): That statement doesn't agree with my quick modeling just read a few articles about DHDL antennas. One article states, the cut off frequency where the antenna becomes useless is when the overall length of wire reaches a 1/4WL... my results attached 73

Re: Topband: DHDL

That statement doesn't agree with my quick modeling just read a few articles about DHDL antennas. One article states, the cut off frequency where the antenna becomes useless is when the overall length of wire reaches a 1/4WL... my results attached 73, Martin, OK1RR CM Double Half-Delta

Re: Topband: Protecting an Array Solutions K9AY Loop from Transmitted RF

I did quite lot of research about protective limiters. The best solution found is to use the special TVS diodes RClamp2502L by Semtech which incorporate surge rated, low capacitance steering diodes and a TVS diode in a single package. During transient conditions, the steering diodes direct the

Topband: RClamp2502L

datasheet here http://www.ok1rr.com/files/rclamp2502l.pdf 73, Martin, OK1RR Dne 11. 10. 19 v 15:17 Martin Kratoska napsal(a): I did quite lot of research about protective limiters. The best solution found is to use the special TVS diodes RClamp2502L by Semtech which incorporate surge rated

Re: Topband: FT-8 Contest would be great for Topband

Quite few happy experimenters, lots of disgusted DXers. 73, Martin, OK1RR _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: FT-8 Contest would be great for Topband

I applaud, Dave! 73, Martin, OK1RR Dne 11. 01. 20 v 6:02 Dave AA6YQ napsal(a): + AA6YQ comments below It would seem that the new digital modes have re-invigorated ham radio, at least activity wise. But if ham radio is so fragile that it cannot sustain in the face of interest in a new mode,

Re: Topband: BCB Filter - final selection

This one is much better, however you should build it yourself... 73, Martin, OK1RR Dne 17. 04. 20 v 12:59 Edward via Topband napsal(a): Thank you all for your recommendations. Leaning towards this filter below. Any objections before I pull the trigger?

Re: Topband: CQ Zones

Oh, FT8 should be proclaimed as illegal for DXCC (WAZ, WAS etc.) in mixed categories. This "mode" should be counted completely separated from traditional modes like CW or SSB. 73, Martin, OK1RR Dne 09. 03. 21 v 15:16 Ian Fugler napsal(a): Hi, Dave Zone 23 - JT5DX will be your man. He is

Re: Topband: CQ Zones

tegory! Karel OK1CF ______ Od: "Martin Kratoska" Komu: topband@contesting.com Datum: 09.03.2021 15:37 Předmět: Re: Topband: CQ Zones Oh, FT8 should be proclaimed as illegal for DXCC (WAZ, WAS etc.) in mixed categories. This "mode" should be counted completely separat

Re: Topband: removing ft8 from dxcc waz was etc

...@ok1rr.com Cc: topband@contesting.com Subject: *SPAM* Re: Topband: CQ Zones And you decide whether any of us deserve to follow our own preferences! We don't need you as a dumb ass wanna be leader. Sent from my iPhone On Mar 9, 2021, at 18:25, Martin Kratoska wrote: Glenn (VA3DX), BRAVO, I

Re: Topband: removing ft8 from dxcc waz was etc

el@contesting.com] On Behalf Of Glenn Wyant Sent: March-09-21 7:46 PM To: mar...@ok1rr.com Cc: topband@contesting.com Subject: *SPAM* Re: Topband: CQ Zones And you decide whether any of us deserve to follow our own preferences! We don't need you as a dumb ass wanna be leader. Sent fro

Re: Topband: CQ Zones

. What I am doing wrong? 73, sincerely Martin, OK1RR Dne 09. 03. 21 v 20:41 Jim Brown napsal(a): On 3/9/2021 6:36 AM, Martin Kratoska wrote: Oh, FT8 should be proclaimed as illegal for DXCC (WAZ, WAS etc.) in mixed categories. This "mode" should be counted completely separated from t

Re: Topband: CQ Zones

Wyant napsal(a): And Martin there is no need for you stay here. Obviously you don't need us , you are so much better than us ft8 Cw ssb rtty etc etc ops Glenn VA3DX Sent from my iPhone On Mar 9, 2021, at 11:40, Martin Kratoska wrote: Bob et al, all these rules can be preprogrammed

Re: Topband: QRM Eliminator

Nothing against NCC phasers but I would try the PA0SIM phaser http://www.pa0sim.nl/Phaser%2080%20-%2010%20meters.htm before making any decisions. It can be better than any NCC, assumed that the amplifier on the output has fairly low input impedance and excellent IM properties. At least, you