Upgrade to my SvxLink Node

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1 Scope

This project is a follow-up of a number of predecessor projects. From time to time, projets need a face lift, and my SVXLINK noe suffered a nearby lightning strike, and lights went out. Time to replace the machine used up to now.

The most recent computer hardware used for the project was a Seagate FreeAgent, an early embedded platform that you could use as a hacker. Even though we're using Raspberry Pi 3B+ today, version 1 still is very useful and so I decided to assign one of my surplus boards to this task.

Previous experiments in this context:

2 Mechanical changes

  • The entire hardware was upgraded to be a 19" 3HE board carrier. I am using two VERA BICC Monovolt, giving me sufficient power at 12 and 15 volts.
  • The mast unit has been replaced with a most recent Miktorik W60G "wireless wire" operating at 60 GHz.
  • The main switch unit has been replaced to be a 1HE Mikrotik RB2011RM with 10 ports. The former switch unit, a noname 5 port switch went out of operation.
  • The Raspberry Pi 1 now operates a USB hub, which again connects to an external disk of 500GB, acting as home partition.

3 Other Hardware

I am using the FUNKAMATEUR transceiver interface, however only the PCB, without the original case:


2018-08-05-box73-trx-if-1.gif 2018-08-05-box73-trx-if-2.gif

4 Software

In order to retain a working Debian / Ubuntu distribution that includes and monitors also the SVXLINK files, I decided to use a trick. There are many tutorials out there how to compile SVXLINK yourself. But the idea of having unmanaged files on my disk sucks.

Here is the proof that the transceiver interface is present:

root@db0bul:~# lsusb
Bus 001 Device 007: ID 0bc2:2120 Seagate RSS LLC 
Bus 001 Device 009: ID 08bb:2902 Texas Instruments PCM2902 Audio Codec
Bus 001 Device 008: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 001 Device 006: ID 0451:2046 Texas Instruments, Inc. TUSB2046 Hub
Bus 001 Device 005: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 004: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp. LAN9500 Ethernet 10/100 Adapter / SMSC9512/9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

The USB trx if appears as the Texas Instruments PCM2902 Audio Codec.

So this is my sound card device architecture:

root@db0bul:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: CODEC [USB Audio CODEC], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

So I will be using hw:1,0 as audio interface.

5 Images

2018-07-30-holzschupferrack.jpg 2019-01-11-holzschupferrack-3.jpg

2019-01-11-holzschupferrack-1.jpg 2019-01-11-holzschupferrack-2.jpg