HAM shack
Made a little riser so the Power Supply Units could have a spot below the radio’s. Nice huh?… Read the rest
Author: gerard
Antenna Matching Unit
1.
Today I came across a second hand manual antenna matching unit (an MFJ-971). It can alter the inductive and capacitive impedance of antenna’s so they match impedance of the transmitter.
For a description, see this page.… Read the rest
New radio’s
Yesterday at HAMshop in Maarsen I picked up my new radio’s and unboxed them. Today I’m looking at all the settings, browsing through all the menu’s. The combination of these two radio’s covers all of the legal amateur bands in the Netherlands.
unboxing PSU’sMAAS-SPA-8230OperationalUnbox icom 7300switched onUnbox icom 9700Both radio’s… Read the rest
Silencing my signal generator (2)
A while ago I lowered the voltage of the fan in my to silence my signal generator. It was better, but over time I still found it rather noisy. So today I came up with a simple solution to silence it some more.
Floorboard insulation
I took a small piece… Read the rest
First satellite image!
Today I captured my first satellite image with my SDR. It is a picture that was scanned by the NOAA 19 satellite (ch 1-4, northbound 10E) at 2021-3 -26 14:39 UTC. The pass took about 20 minutes.
Granted, the quality is not yet very good, but when you look carefully,… Read the rest
Radio & satellite tracking
With my new SDR (Software Defined Radio) I am able to listen to radio transmission ranging from 1KHz to 2GHz. This includes most amateur bands, long wave, short wave, HF, VHF and UHF. That’s a lot of options! The radio is a RSPdx from SDRplay:
I started out simple by… Read the rest
Silencing my signal generator
Waveform generator
My RIGOL DG1022Z waveform generator made a lot of noise when I first switched it on. There’s a little fan in there, operating on 12 Volts.
Having opened up the device, I took out the fan and tried to operate it on 9 Volts. That still worked adequately,… Read the rest
My command center
In the image you can see my ‘command center’. I run 5 emulated mainframes, four of them on Raspberry Pi’s and one of the in the cloud. With all five system you see a 3270 terminal and the emulator console next to each other:
Top left is my cloud system,… Read the rest
Bench hooks preview
I’m creating some bench hooks for my workbench. More details to follow, but I thought I’d give you a sneak preview…… Read the rest
Made my home cloud server
Today I finished setting up my own home cloud server – on a Raspberry Pi 4. I did that using the software provided by Nextcloud. It’s relatively easy to set up once you have it installed. The installation includes setting up a firewall, a webserver (using LAMP), a self signed… Read the rest