Jabra DECT Headset for all Transceiver

Jabra 920 Pro DECT Headset

The Jabra Pro 920 DECT headset is very suitable as a headset for all transceivers. In my case for the IC-9700 (QO-100) and IC-7700 for shortwave. Together with the EQ of UR6QW modulation is perfect. All Jabra functions such as mute etc. work without restriction and I can now move freely up to 150m away from the transceiver and also be on-the-air with the VOX function.

Thanks to Leander HB9RMW for the engineering.

SunSDR2-DX Transceiver

SunSDR2-DX Transceiver

Based on the popular SDR transceiver 'SunSDR2-Pro', the Russian manufacturer Expert Electronics offers the 'SunSDR2-DX'. This transceiver works as a direct scanning Software Defined Radio (SDR) with a high resolution 16 bit A/D converter. All amateur radio bands from 160 to 6m as well as the 2m VHF band are supported. The transmission power is 100W on short wave, 50W on 6m and 7W on 2m.

The SunSDR2-DX is great Transceiver with 100W output. Connected via the special cable from Billy GM6DX for my SPE Expert 1.3k power amplifier, the transceiver is a great solution for 1kW. Also the remote use via a special Raspberry Pi makes the solution usable from anywhere.

Swiss Active-Dipole with Airspay HF+ and Sypserver

Swiss Active-Dipole Project at Home (July 2020)

It is amazing how well an Active-Dipole antenna receives at home. Here I describe my project with an Airspy HF+ SDR receiver and a Raspberry Pi 4.

Swiss Active-Dipole from STAMPFL with Airspy HF+ and Spyserver on a Raspberry Pi 4 Documentation [1’706 KB]
STAMPFL Website to order the Active-Dipole antenna
FENU-Radio Website the Swiss SDR Expert and Tester

Remote Control Expert 1.3k Amplifier

Remote Control of Expert PA 1.3k over Internet

The goal was to remote control our SPE Expert 1.3k amplifier at our Remote DX site in the Swiss Alps for 2 operators (HB9RYZ and HB9CQK) "simultaneously" with the SPE Expert Term software via the Internet.

Looking for a stable solution – and we found a solution
We were looking for a reliable and stabile solution for our remote DX-Station in the Swiss Alps to remotely control our SPE Expert 1.3k power amplifier over the internet.

Our requirements were:
- reliable and stable, high availability
- se of the existing SPE terminal software - Term_13k_232.exe
- provide one virtual serial port for Windows 10
- A solution without the use of a Windows PC at the backend (remote site)
- a robust and weatherproof industrial hardware
- a simple web-based admin consoleup to 4 concurrent connections possible at the same time
- Display of the SPE Expert 1.3k display in real time
- network-enabled device

Remote Control Soution for SPE Expert 1.3k amplifier over the Internet Documentation [578 KB]

Shack Audio and MIC Switch Box Solution with EQ

Audio and MIC Distribution Switch for the Shack

The idea was to have an Audio and MIC Distribution where I can choose between different Audio-Inputs and -Outputs and to switch the MIC (Headset) to the right ICOM-Transceiver.

So I'm able to switch easy from the PC Sound (SDR Radio Console, HDSDR, Expert SDR2 etc.) to the IC-7700, Rohde & Schwarz EK070 or IC-9700 for OSCAR-100 SAT operation using the Antlion Mod4Mic v4 or Heil Pro Set 6 (iC) Headset. In addition is a switch to switch between the ICOM Speaker SP-34 and the Headset.

The ELAD TX/RX Switch is used to disconnect the PC-Audio listening to the remote SDR such as Websdr, ColibriDDC, SDR Radio Console, etc. while sending with the IC-7700 or SunSDR2-DX Transceiver.

10-Band EQ V7 for ICOM from UR6QW

10-Band MIC EQ V7 for my ICOM Transceivers

The EQ V.7 is a versatile sound processor. You can connect any microphone to it (even a Condenser one requiring 48V phantom power) and make your studio-quality signal.

It works excellent with my IC-7700 and IC-9700. I'm uisng the Antlion ModeMic4 Microphone or the Heil Set Pro 6 IC.

UR6QW original website
AD5GG website with tips
Antlion ModMic v4 website

EQ V.7 Manual [1’416 KB]

NextCloud Raspberry Pi HAM-Server

NextCloud HAM-Server based on Raspberry Pi

To use this cost-efficient private cloud solution for example for your HAM-Log e.g. for Log4OM or for other HAM stuff such as documents, webserver, etc.

For many years, major cloud providers (e.g. Dropbox, OneDrive, Google Drive or iCloud Drive) have made it easy to access important documents, photos or other files anytime, anywhere.

The flip side: Those who use commercial providers give their data unfiltered into foreign hands. The solution is to set up your own cloud via open source services such as Nextcloud. With Nextcloud it is possible to manage files and also various functions such as calendars or online notes on a private web space. Using the various clients of Nextcloud, the data can then be synchronized conveniently and securely on practically any number of systems. But not everyone has their own web space available or wants to bear the associated costs and maintenance effort. As so often, the Raspberry Pi! With a little tinkering, it is possible to equip the mini computer with a Nextcloud instance.

NextCloud Raspberry Pi HAM-Server Documentation [313 KB]

ICOM Adapter for Heil BM-17 (IC) Headset

Adapter for Heil BM-17 (IC) Headset

The goal was to develop an adapter for the Heil BM-17 (IC) headset for all three ICOM transceivers such as IC-7610, IC-9700 and IC-7700, which works with the ED microphone switch.

ColibriDDC SDR as Panadapter for IC-7700

ColibriDDC SDR/SDRPlay as Panadapter for IC-7700, IC-7610 and IC-706MKIIG

A panadapter is a device (SDR receiver) that connects to a standard hardware radio and allows you to visually see the RF signals on a waterfall. Since SDR’s run on the PC, they naturally have the ability to display a panadapter screen, and most software like SDR#, HDSDR and SDR-Console already provide this.

In my case I had a spare ColibriDDC SDR and SDRPlay RSP1A which I used now as panadapter for my IC-7610, IC-7700 or IC-706MKIIG to improve the capabilities of my ICOM transceivers.

Project Clean up my Shack (Sept. - Nov. 2017)

Project Clean up my Shack (Sept. - Nov. 2017)

Main Goals:
- reduce overall noise (RFI) with an excellent grounding
- remove all small 220V noisy switched power supplies
- use only high-end components
- for best usability
- for easy maintenance

Main Workstreams:
- new Shack furniture
- new AC and DC (13.8V and 5V USB) Power Distribution and cabling
- intergrade a RFI filter in to your main AC
- use a lot of folding-ferrite (on every cable e.g. USB, serial, network, etc.)
- new grounding concept based on a main copper plate bus
- new computer (USB & RS232) and network cabling
- etc.

RFI in your house

Power Supply Modification

Modified power supplies for less noise

Main Goals:
- reduce overall noise with an excellent grounding
- include a primary 220V main power filter
- include a countered coil with a capacitor in the output power line (13.8V and 5V)
- remove all small and cheap 110V/220V noisy power supplies

Modified Power Supplies Documentation [2’097 KB]

SDR-Play RSP1A as Pandapter for the IC-7700

SDR-Play RSP1A as Pandapter for the IC-7700 (Dec. 2017)

It's just amazing to see the whole band on the panoramic screen while connected to the IC-7700 over Omnirig. Download the SDRPlay Panadapter Quide for many types of transceiver (ICOM, Kenwood, YAESU, etc.) here

The first version I was using only a BNC T-connector to feed the signal to the RSP1A and back to the IC-7700 RX-IN. I was told that in addition to the >3db signal loss I ran the risk of introducing all sorts of unwanted signals into the IC-7700 receiver. So I was looking for a powered lossless 2-way active RF signal splitter and found the "Boni AntennaJet AAS300D" from Bonito Hamradio. Installation was simple. I connected it to my central 40 Amps 13.8 V power supply.

Boni MagaLoop FX Active Antenna Test

Boni MagaLoop FX Active Antenna Test versus my Inverted-V Antenna (January 2018)

I made the tests at my home QTH to compare the signals with my current Inverted-V Antenna on top of my roof and the new Boni MegaLoop FX Active 80cm Loop on my balcony just 3 meters below the Inverted-V antenna.

It seems that my Inverted-V Antenna is performing great compared to the Loop. I've got no advantage from the Loop in order to receive a stronger or a better signal with less noise.

Boni MagaLoop FX Active Antenna Test versus my Inverted-V Antenna (January 2018)
I made the tests at my home QTH to compare the signals with my current Inverted-V Antenna on top of my roof and the new Boni MegaLoop FX Active 80cm Loop on my balcony just 3 meters below the Inverted-V antenna.

Here are the audio files (13. Jan. 2018, 10:00UTC):
14.222 MHz - USB - 59 - CT1EHI - Loop [64 KB]
14.222 MHz - USB - 59+10 - CT1EHI - Inverted-V [187 KB]
14.222 MHz - USB - CT1EHI - Loop - Inverted-V - Loop [237 KB]

14.289 MHz - USB - 59+10 - LZ1833PSS - Inverted-V [147 KB]
14.289 MHz - USB - 59 - LZ1833PSS - Loop [228 KB]

7.131 MHz - LSB - 59+20 - DL8MLD/P - Inverted-V [307 KB]
7.131 MHz - LSB - 59 - DL8MLD/P - Loop [303 KB]

It seems that my Inverted-V Antenna is performing great compared to the Loop. I've got no advantage from the Loop in order to receive a stronger or a better signal with less noise.

ICOM SP-34 Speaker Upgrade

ICOM SP-34 Speaker Upgrade

Your speaker sounds better with PHITS Traditionally, communication speakers have been designed without following acoustic criteria to obtain the maximum sound quality. Their main defaults are low stiffness and the resonance of the metal cabinet. PHITS is a Phonema kit developed to acoustically improve communication speakers.

Thanks to the combination of different densities materials, a more stiffenes box is achieve and reverberation is eliminated in more than 47 dB. The result is a pure, clear and a more inteligible sound.

WebCam on the roof (Dec. 2017)

WebCam on the roof (Dec. 2017)

To see the panorama view from my QTH (JN47FE) - such as Mount Pilatus direction Lucerne (Cam-Typ: HIKVISION DS-2CD2152F-IS)

Please click on the live view link in the footer to see the live view from my QTH.

Flex 6600M

Flex Radio 6600M

Flexradio FLEX-6600M
1. New Remote Concept using iPad or iPhone like a remote station
2. Fully proofed SDR Technology
3. Four independent VFO at the same time
4. Use for FT8 and JT65

Flexradio FLEX-6600M
Broschure [2’019 KB]
SmartSDR User Guide v2.1.30 - 29. January 2018 [8’117 KB]



I started my DMR Radio expierence in June 2017 with the following support and equipment.

- TYT MD380 GPS DMR Digital Radio with experimental firmware
- AnyTone AT-D868UV Dualband DMR/FM
- SharkRF openSPOT2 (6.1.2019) with WiFi
- mini WiFi Router MEGA DV (not in use)

openSPOT Hotspot Mobile Solution

TYT MD-380G GPS DMR Digital Radio

BlueDV is a free software that runs NOT on the Raspberry Pi but on an iPhone or Android phone or tablet. The BlueDV app controls the Raspberry Pi & DVMega. The Raspberry Pi and the DVMega HF module are thus "dumb" and follow only the instructions, which come from the Handy / Tablet (BlueDV App). The overall intelligence / handling is in the BlueDV app, NOT on the Raspberry Pi. Thanks to HB9PJT for his support and patience to get started with my DMR-Radio and to David PA7LIM who made his BlueDV App available for iOS, Android, Windows, Linux etc. BlueDV Hotspot with the iBlueStackMicro+ Board for iOS (US$ 149.-)

BlueDV Hotspot with iPhone 6S

Must have links:
- MD-380G Experimental Firmware v13.020 and Codeplug from SwissDMR.
- TYT MD380 GPS DMR Digital Radio with experimental firmware (German User-Manual [324 KB] by DG9VH)
- SharkRF openSPOT
- mini WiFi Router WiFi Router
- Brandmeister Network
- DMR Dashboard Germany
- TYT MD-380 Tools
- Codeplugs for Switzerland DMR-Zone
- DMR Tipps in German by OE7BSH
- MD-380G programming CPS Software
- MD-380G software tools by GB7FO
- MD-380G Contact-Manager by N0GSG