Auteur: <span>2018</span>

Lightning Receiver

In the januari 2017 number of Razzies there was an article about a lightning receiver. They started with an basic receiver, but later changed to a pre-build module with more capabilities. My interest wen’t to the basic receiver, simply because, like many of my little projects, its all made up around component that many of us…


First steps in the things network

Today i received a nice little package. Inside was a Pi-Hat for LoRa.             Specifications Lora Spec 168 dB maximum link budget. +20 dBm – 100 mW constant RF output vs. +14 dBm high efficiency PA. Programmable bit rate up to 300 kbps. High sensitivity: down to -148 dBm. Bullet-proof…


13.8Volts 47Amp PSU

The idea I have some old server power supplies laying around with the intention to convert them in to a good power source for my HAM stuff. The base will be and DSP-600 from HP, capable of producing 47Amps on 12v. With some tweaking it can produce 13.8V, Also it has a 5V. Always handy…


12V 10Amp 19″ power supply

I have had the parts laying around for a while and with the arrival of the 2U high 19 inch chassis it was time to put it all together. A 12V (13,4 actually) power supply for in my rack. Some specs: DV voltage : 13,4 Volts ( i can’t up the voltage more on the…


Carbon Microphone conversion

Sinds I have a SEM-35 I have noticed that the mic really sucks (excuse me for the langue). But these carbon microphones have a tendency to become clothed. It come with age and moisture. So after searching the web i found a side that has nice description how to convert it to a electret microphone. The site is…


JOTA 2016 – Preparations ATV

This year during the 40th JOTA at my Scouts Club we wanted to do something new and different. As this will be the 40th time PA0AKS/J will be active, and the last time under his super vision. So we are building an ATV station. Here are some specs: RX : 10.3Ghz Hardware: Philips Satellite reciever,…


SEM-35

At my birthday party someone showed up with a awesome old radio. An old SEM-35 manpack radio. SEM-35 Specifications Frequency Coverage 26 to 69.95MHz Channels 880 spaced 50kHz Modulation F3 (FM) Deviation 15kHz max. Transmitter RF Output 150 mW or 1Watt Frequency Stability < + 3.5kHz from -40 to +600C Receiver Sensitivity < 0.5 micro…


DRA818 – Weekend Radio

DRA818 module comes in two versions: DRA818V, that covers freq. from 134 to 174 MHz and DRA818U that covers freq. from 400 to 470 MHz.  I have the VHF version. At the present I have programmed it to have: 1. simplex channels with 12.5 kHz step 2. repeater channels with 12.5 kHz step (subtones included)…


QRP operation from 28 juli till 31 juli 2015 from JO22pc.

During the summer of 2015 i wen’t to a scouts campsite called “PBC Austerlitz” and took my antenna’s and radio. It was a real outdoor, cook dinner on a fire, activation. I took the trusty FT-817, and the antenna’s. I used the G5RV Junior, DIY Longwire and the last day I tested my fixed DIY…


QRSS – Ultimate3 kit

Going QRSS – Ultimate3 kit. I’m on the waiting list due to the enormous demand….. that means only 1 thing… it’s a really good kit.. Will have the 10, 20 and 40M LPF and relay board. The powerboard for the wspr beacon and qrss transmitter. Now on are 5volt and 9volt. Will add 3,3volt later…