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HARDROCK-50
Intro
I try to fix a HARDROCK-50 amplifier, which a fellow HAM bought second hand but it didn't really work.
hamware - FT-991A Unterstützung
Allgemein
Ich habe die Firmware für die Hamware Tuner um den Yaesu FT-991A erweitert.
In Verbindung mit den Logbuchprogrammen UCXLog und Swisslog folgt der Tuner automatisch der eingestellten Frequenz.
Nähere Infos sind hier zu finden.
Common mode filter/ Balun (DK2DB version)
Some quick measurements on a DK2DB balun.
It is a W1JR-style wound balun with a AMIDON 140-43 FT core.
Also check the measurements on a flea market find BALUN.
hamware AT-615B Firmware
New firmware for hamware AT-615B
I've developed firmware version supporting the AT-615B tuners from hamware.
You can find information in the manual for the AT-615B, which is identical in terms of usage.
Parts are available at cost price. Please check here.
EFHW Balun
Based on the work of Jan, DJ1JAN I've build some QRP-1:49 UNUNs.
My first experiences with this board on 20m using a FT82-44 core are, that the core gets hot at 5W on 20m / 14MHz.
Based on this experience I consulted the mini Ringkernrechner and and did some calculations. As far as I understand, the primary coil with 3 turns limits the maximum usable power.
IoT - Reading water meters
Browsing the internet, I stumbled over an interesting video on YouTube were a guy shows a very cheap ESP32+camera solution to read the analog readout of water meters.
The software was developed by JomJol and provided on his Github repository. All you have to do is to buy an ESP32+camera module, flash the firmware und the SD-Card and then the water meter is read.
QO-100 - IceConeFeed v2
Yesterday the IceConeFeed v2 from Patric - DC8PAT - arrived well-packed and preassembled with the Golden Media 202 LNB.
QO-100 - 2021 base-station
I started my journey into QO-100 with a very simple setup. Details can be found here. The previous setup consists of the well known LimeSDR-mini, a pre-amp and a modified WiFi-amp. No I placed all the components into an old case - not so fancy but sturdy.
QO-100 - Audio & CW console
I started my journey into QO-100 with a very simple setup. Details can be found here. I used purely SDRConsole to receive & transmit audio via a simple USB headset. This was no real comfort and it was not capable transmitting CW ;-)
Fortunateley Andreas DL4JAL published 2021 in the German ham radio magazin FUNKAMATEUR an interesting hardware console. The basic idea behind this console is, that through the internal soundcard SSB-audio as well CW-audio can be transmitted. A hardware PTT key can used to switch SDRConsole into transmit mode. Furthermore it controls the timing for T/R-switching - SDRConsole has some delay between audio input and rf-output via the LimeSDR-mini - so no loss of last DIT or syllable.
SDR-stick and RTL_433 - 5 days of monitoring
Some days ago I setup a simle RTL-SDR based monitoring station. Now after about 5 days of more or less constant monitoring I found one interesting thing:
SDR-stick and RTL_433 or how to monitor road traffic
I stumpled across this intersting post on RTL-SDR.COM talking about monitoring TirePressureMeasurementSystems with a cheap SDR stick and a clever piece of software. The rtl_433 software receives and decodes signals transmitted by tire pressure sensors inside the wheels of modern (I assume at least from the last 10 years) cars.
My initial idea is, that I can monitor the traffic in front of my house - at least traffic of modern cars. As Germany is a car centric country, I expect to catch most of the traffic.
Read more: SDR-stick and RTL_433 or how to monitor road traffic
QO-100 - PA protection
Based on the publication of Matthias, DD1US, I bought from him one of these TMT H3930 isolators - Thanks Matthias for supporting the community!!!
QO-100 - RF preamp
In search for a suitable pre-amplifier for the SG-Labs PA V3 I was pointed by a fellow ham to this amplifier on Amazon for abt.€17,-
RF Powermeter - Calibration basics ** updated **
In this post I describe in details, how you can create the calibration factors for k0 ... k3 based on raw data measured with the power sensor.
New boy in town - QCX-mini
Last weekend I've finished my QCX-mini kit for 20m from QRPLabs.
This was a birthday present from my wife and she is very happy, that the QCX-mini now works great ;-) I'm too ...
On Sunday I was able to make three contacts to the US south coast - 5w and a dipole - thats fine.
RF Powermeter - Updated display files
I've updated the the display control files to the current Nextion Editor 1.62:
HMI-file for the editor: here
TFT-file for direct load to display: here
Yaesu FT-818 - Modification MIC MH-31
Comparison between an unmodified MH-31 microphone (dynamic mc) at my FT-818 in SSB and a modified (electret capsule)
Power usage ...
All data measured using the ELV Energy Master Profi-2 Energy Master Profi-2:
- 2-tone generator - FA-2-NF etc.
- IoT - REDIS server as docker@Synlogy
- Docker@Syno::Portainer
- IoT - Tasmota - TH16
- NOAA received @ JN48OQ
- QO-100 - 2019 setup
- QO-100 - new pre-amplifier
- Contesting
- Bodnar GPSDO - 10MHz Low-Pass Filer
- LimeSDR - Housing
- QO-100 - WLAN Grid antenna
- LimeSDR - Measurements
- IoT - Air quality sensor
- JackYack - simple memory morse keyer
- SSTV from ISS during February 2019
- Sale
- Docker@Syno::InfluxDB
- Setting up mail on an RPi to an SMTP host
- IoT - InfluxDB - Restore
- hamware - FTDX-5000 Unterstützung
- IoT - NodeRED - Backup
- IoT - InfluxDB - Backup
- WIMO Diplexer #22030 - 2m/70cm 100W
- ArrowAntennas 146/437-10BP - first measurements
- QRPGuys 40m-10m UnUnTenna Plus
- Cheat sheet for HamGadgets Ultra Picokeyer
- SOTA - DM/BW-078 - Römerstein
- SOTA - Activations
- SOTA - DM/BW-855 - Michelsberg
- SOTA - DM/BW-659 - Kaltes Feld
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