Does an antenna tuner only make the transceiver happy? Crazy Chekov 2025-05-07 | Real world measurements of tuned antennas.Is it really tuning an antenna?.........it is.the length of the feed line (ultraflex 7) was approx. 22m.
EndFed TrafoBox 1:49 download & build #DIY Crazy Chekov 2025-06-28 | I believe these are one of the most efficient EndFed transformers you can build.The 3d Files for 3d printing you can download here:https://www.nicelabs.at/crazychekov/MM0OPX youtube channel who measured these cores:youtube.com/@UCGdQWA7kHTQRwXuPHk2vbhA Additional parts required for the small one:1 x BNC Female Socket UG-290Fair-Rite 2643625002100pF Cap 3kV4 x 2.9 x 9.5mm self-tapping screws countersunk0.5mm enameled copper wiresome wiresAdditional parts required for the big one:1 x BNC Female Socket UG-290Fair-Rite 2643251002100pF Cap 3kV4 x 2.9 x 9.5 mm self-tapping screws pan head1mm enameled copper wire5x banana sockets for 8mm holessome wires
Field Radio Dream Machine Crazy Chekov 2025-06-21 | The latest version of my "custom build" lab599 TX-500.
TX-500 Display Protection for 3d Printing #DIY Crazy Chekov 2025-05-24 | 3d-Files are available on this website:http://www.nicelabs.at/crazychekovAdditional parts required:4 x Magnets. 6mm in Diameter and 6mm in length4 x M4x12mm galvanized screw (needs to be magnetic)2 x M4x20mm screw. The head-diameter equal or smaller than 7mm2 x Distance washer for M4 screws. 7mm in diameter and 8mm in length.More stuff to come.
TX-500 ExpPack Black #lab599 #tx500 Crazy Chekov 2025-05-18 | I am trying to replace all added parts with 3d prints.So that everyone can replicate them.A few are still left.
Antenna Tuner on the transceiver side compared to Antenna Tuner on the antenna side. Measured. Crazy Chekov 2025-05-10 | Comparing and measuring the difference between an Antenna Tuner at the transceiver with an Antenna Tuner "directly" at the antenna.
Settings for JS8Call, FLDIGI, WSJT-X, QSSTV with the Lab599, TX-500 Crazy Chekov 2025-02-17 | Operating System: Linux Bullseye 32bitRaspberry PI Zero 2Wscript for sending CAT commands to the TX-500:#!/bin/bash#Kenwood TS-2000 for Lab599 TX500 cat commandsstty raw -F /dev/ttyACM0 9600#frequency 7.078echo -en 'FA00007078000;' >/dev/ttyACM0sleep 0.3#Switch to Digital Modeecho -en 'MD6;' >/dev/ttyACM0sleep 0.3#RF Power to 70%echo -en 'PC70;' >/dev/ttyACM0sleep 0.3#Attenuator offecho -en 'RA00;' >/dev/ttyACM0
Vertical vs Dipole (inv. V). Field Measurements! Crazy Chekov 2025-02-10 | Using a digital mode to compare a vertical with 1 counterpoise to an inverted V Dipole on 20m. 2000km distance to the targeted station.
Pole holder build. Crazy Chekov 2025-02-09 | Pole holder build for a 6m carbon pole.Music: CarefreeMusician: JonasURL: pixabay.com/music/watr-carefree-10157
EndFed vs Vertical. Field Measurements! 2000km Distance. Corrected Results! Crazy Chekov 2025-02-04 | Antenna comparison between an EndFed and a 1/4 wave vertical with 1 counterpoise. 2000km Distance.Corrected Results!
Lab Talk: Project Updates. Crazy Chekov 2025-01-10 | Some Project updates I'm currently working on:TX-500 (Expansion Pack)Antenna spoolQRP Transformer housingPole HolderWSPR data analysisRaspberry Pi Software ImageZugentlastung :)
BaMaKeY TP3 with Lab599 TX-500 Crazy Chekov 2024-12-24 | BaMaKey TP-IIIbamatech.net/morsetasten/bamakey-tp-iii-twin-paddle-key-grau.htmlLab599 TX-500desert-wireless.com/tproduct/627963580-780192667891-discovery-tx-500-hf50mhz-transceiver
Dipole Vs EndFed - Field Measurements Crazy Chekov 2024-12-21 | I'm measuring the difference in SNR between a Dipole and an EndFed antenna in the field with the help of a digital mode.
EndFed SetupTime reduced to 5min 47secs. Video analysis. Crazy Chekov 2024-12-14 | Analyzing the setup process from the video.5min is near.
EndFed: Setup Time (DigiMode) down to 7min 7sec. Crazy Chekov 2024-12-07 | Reduced the Setup Time for the Digital Mode Js8Call with an EndFed Antenna to 7min 7 secs. Target is 5min.Feel free to challange me if you are quicker. That would be nice :)
(tr)uSDX - A Game Changer! Crazy Chekov 2024-11-30 | My review about the (tr)uSDX transceiver by PE1NNZ and DL2MAN.www.dl2man.de
This is what an EMCOMM transceiver should be able to do. #transceiver #emcomm Crazy Chekov 2024-11-25 | ...
Field Test, Cutted Ferrites, Spool Fail, EndFed Trafo Measurements,Jodeln Crazy Chekov 2024-11-09 | All what happened last week.
Adjustable ENDFED Trafo. First Field Test. Crazy Chekov 2024-11-02 | Testing the adjustable transformer for the EndFed in the field.
EndFed Antenna - Grounding Yes or No? Field Measurements. Crazy Chekov 2024-10-19 | Does it makes sense to ground the 49:1 transformer in the field?
Integrated choke on a Lab599 TX-500 #lab599 #mantelwellensperre Crazy Chekov 2024-10-14 | Why no one is putting a choke already inside transceivers?
Integrated choke. Less risk to break it. Field setup time reduced. Crazy Chekov 2024-10-12 | To make the setup in the field a little bit easier I integrated the choke to the transceiver.
ENDFED: Choke vs No Choke. Field Measurements. Crazy Chekov 2024-10-05 | Field measurements of an EndFed NVIS Setup where we tested the effect of a choke before the 1:49 transformer.Thx to Sigi for helping me with the measurements and making the video footage!
Meshtastic Eightwood 868MHz Yagi and a HF Meter Crazy Chekov 2024-09-28 | Build of an HF Meter.With that building a 3 element yagi out of an Eightwood 868MHz antenna.3d files: https://www.nicelabs.at/tmp/_LINKED/EightWoodYagi.zip
ENDFED - transformer comparison. Big vs Small. Field measurements. Crazy Chekov 2024-09-21 | EndFed Field measurements:A big double stacked 49:1 transformer compared with a single portable one.Thx to Sigi for helping with the video footage and measurements!
TX-500 Expansion Pack. My russian edition. Crazy Chekov 2024-08-24 | Adding the newest version of my TX-500 expansion pack to my device in russia.
How I build a base plate for my vertical antenna. Crazy Chekov 2024-08-17 | How I build my base plate for a vertical antenna (telescopic whip or cable)
Elevated Vertical. Test of how a choke at antenna feed point effects the performance. Crazy Chekov 2024-08-10 | Field test with an elevated vertical with 1 radial ( counterpoise ) and a choke at the antenna feed point vs no choke. Is the choke necessary ?Test with digital mode Js8call and averaging multiple transmissions.
TX-500 Expansion Pack maintenance...and a 2nd one Crazy Chekov 2024-08-03 | Maintenance of my expansion pack for the lab599 tx500 and preparing a 2nd one for my other tx500 in RU.
Vertical antenna at ground with 12 radials compared with elevated position with 1 radial. Part 2. Crazy Chekov 2024-07-27 | Another comparison between a ground vertical antenna with 12 rafials vs an elevated vertical 1.2m with only 1 radial. This time on slightly different positions so that the 12 radials are not effecting the 1 elevated radial. Thx to Larry who advised me to do that.
Vertical antenna at ground with 12 radials compared with elevated position with 1 radial. Part 1. Crazy Chekov 2024-07-20 | Comparing a 1/4 wave vertical antenna deployed on the ground with 12 radials with an elevated position and only 1 radial. Measuring the average SNR by switching 34 times back and forth between those two setups.
Lifted up vertical comparison. Better than a ground vertical with radials? Crazy Chekov 2024-07-18 | ...
Digital modes with only 66g ( 2.3 oz ) Crazy Chekov 2024-07-13 | How to build a cheap, lightweight computer with very less power consumption for digital modes in the field.
Bal-Un Box with pole mount build...DIY Crazy Chekov 2024-07-06 | Build video of my DIY BalUn Box with a simple slide on pole mount.
Simple ground holder for 6m pole. First test in the field. Crazy Chekov 2024-06-29 | Testing the ground holder first time in the fields.It seems to work well!6m carbon fiber pole:wimo.com/de/18330-6ul
6m carbon pole holder. Will it work? Crazy Chekov 2024-06-23 | Welded a holder together for a small lightweight carbon pole.That should be a quick setup time...but will it work?
Final result of all Dipole NVIS measurements in the field. Crazy Chekov 2024-06-22 | Based on my field measurements for the inverted V Dipole I will show you the final result. The best setup!
Stronger signal due to grounding? Crazy Chekov 2024-06-16 | A comparison between ground connection of the coax shield and no ground connection.Field measurements of signal to noise ratios of the field station and the receiving station.
NVIS Dipole, Hybrid Balun V2 vs 1:1 Transformer Crazy Chekov 2024-06-07 | Field measurements of a hybrid balun compared with a 1:1 transformer/voltage balun.Figuring out the best dipole, NVIS, inverted V setup based on measurements in the field.
NVIS Dipole, Coax feedline vs No feedline Crazy Chekov 2024-06-01 | Using the digital mode js8call to compare signal to noise ratios of two different setups. In this case to measure the possible effect of a feed line against a direct connected transceiver to a dipole.Does it radiate or not?
NVIS Dipole, 1:1 Transformer vs Nothing, Field measurements Crazy Chekov 2024-05-30 | Field measurements of a 1:1 transformer against nothing.Using digital modes to compare two setups in the field.
NVIS Dipole, Coax choke vs Nothing Crazy Chekov 2024-05-23 | Real life measurements and comparison between a dipole antenna with an coax choke at the antenne feed point and without.Using digital modes for more accurate measurements.
Best Bands 2023 ( free to download ) Crazy Chekov 2024-05-20 | An analysis of which band was actually the best in 2023.Based on historical WSPR data.Useful for emcomm and making your own predictions if you want to have a targeted ham radio contact.Feel free to download the PDF files at:https://www.nicelabs.at/tmp/_LINKED/BestBands2023.zip
NVIS Dipole, Hybrid Balun Vs Nothing Crazy Chekov 2024-05-16 | Real life measurements and comparison between a dipole antenna with an hybrid balun and one without.
