| Tech Corner | Summary | Post date | Author |
|---|---|---|---|
| Linux sound, for applications such as FLDIGI, WSJT and WSPR |
You want a USB sound device to dedicate to radio,
|
02/03/2013 | VK2ZIW |
| Software Defined Radio (SDR) for Linux, with a RTL2832 based USB TV stick |
Which Linux to loadAll the pre-compiled binaries need GLIBC 2.15 so, we need: PC or laptop must have USB 2Easy GUI receiver SoftwareGQRX |
02/03/2013 | VK2ZIW |
| FM Repeaters on 23cm |
A new 23cm repeater is active at Chatswood on 1273.200MHz +20MHz offset, with no tone required for access. The repeater produces a 91.5Hz tone at the output during operation. |
01/02/2013 | VK2TIM |
| Locking the Icom IC-910 to a Rubidium Standard |
If you want to gain high stability and high frequency accuracy for your IC-910 or any Icom radio that uses the 30.2Mhz as its local oscillator then this article is for you. |
20/12/2010 | VK2XTT |
| VK2TIM's online Blog site |
I've created my own website (based on Drupal, just like this one). |
19/12/2010 | VK2TIM |
| A subtone encoder for allowing older radio's to use repeaters |
This is a simple subtone encoder that anyone can build, which will generate 123Hz (default), 91.5Hz -or- both at the same time, for convenient repeater access. I have to advise, that I am not sure of the legality of running both 91.5Hz and 123Hz at the same time, but it does work :) |
01/08/2010 | VK2TIM |
| A simple 30w class C PA unit for 2m use |
This is a power amp that is great for giving your 2m HT a bit more grunt. |
30/05/2010 | VK2TIM |
| A GPS driven "No need to set" clock/compass/speedo |
A GPS based clock using a 16F628A PIC, and a EM406A GPS Module - Hardware by VK2TIM, Original Firmware, design and concept by Ken, VK7KRJ |
21/01/2010 | VK2TIM |
| Audio Function Generator with Frequency and P-P voltage display |
This is an audio signal generator that does sine or square wave, operates from 20Hz to just over 30Khz, has a frequency display with 1Hz resolution, and a P-P output voltage indicator with a resolution of 100mV. |
04/12/2009 | VK2TIM |
| Building a Dummy Load and Measuring Power Accurately |
The title says it all. This article is published with the permission of the author, Ken Kemski K4EAA. |
13/11/2009 | VK2ERP |
| Roger Beep Unit by Peter VK2PJZ |
This unit is designed to run in line with your microphone so requires no modifications to your transceiver. |
12/11/2009 | VK2VG |
| A 16F88 PIC Based Clock and Calendar using a Dallas DS1307 RTC Device for battery backed up timekeeping |
I've been at it again, this time, I have coded for a clock that shows time and date, will keep time accurately with no DC applied as it is interfaced to a Dallas DS1307 timekeeper. |
02/11/2009 | VK2TIM |
| A compact 1:1 Choke Balun with decent power handling, for less than $50 |
Here is a simple weatherproof choke balun, capable of 100w+ power handling, compact in size, neat looking and low cost. |
17/10/2009 | VK2TIM |
| Checking the Calibration of your SWR meter and constructing a dummy load. |
There is a simple way to check if your SWR bridge is working correctly. You will need a 5 watt resistor, not wire wound, of 75 ohms and 100 ohms. |
16/10/2009 | VK2XTT |
| Suppressing RF Interference |
Ferrite is your friend, and more often than not, the simplest solution to RFI problems. |
29/09/2009 | VK2TIM |
| PIC based digital clock |
A "Vanity" LCD clock that displays the current time and -your- callsign, using a 16F84A PIC Microcontroller |
29/09/2009 | VK2TIM |
| RT-85 |
Converting an AWA RT85 LOW BAND Transceiver to 6 Metres |
19/09/2009 | VK2VSV |
| FM900 |
Information about modifying a Phillips FM900 for Amateur use |
19/09/2009 | VK2VSV |
| CTCSS Board |
Circuit diagram and PCB layout for Tait Electronics TA-500 CTCSS Encoder |
19/09/2009 | VK2VSV |
| Attenuator |
An attenuator suitable for foxhunting and other equipment testing |
19/09/2009 | VK2BOS |