W7TDC article on restoration of the AL-80A RF amplifier. The Ameritron AL-80A uses a single 3-500Z triode to produce over 1KW of power with only 65 watts of drive. I purchased it in the beggining of July 2003. It had several problems when I got it. The tube was bad, a VHF parastitic had occurred,…
Author: Simone
Born in 1970 currently live in Florence Italy.
Married with 2 childrens work as IT Technician.
WinPSKse
This free application developed by KA1DT is no more developped but still offer interesting features and is just 970Kb. Download WinPSKse v 2.23
AM Antennas
An AM loop antenna is one of the true marvels of electronics. Requiring no power, it takes advantage of the resonant properties of aninductor and a capacitor connected in parallel to receive weak AM stations. The “loop” part of the antenna is the inductor, and thetuning capacitor makes it resonate at a desired frequency.
Kenwood Smart Memory KSM
KSM Kenwood Smart Memory is a program to read and update the memory channels of a Kenwood amateur radio. The current supported types are: TS-450S, TS-570D, TS-570S, TS-690S, TS-870S, TS-940S,TS-950S. Software by PP1ETL has changed various download sites during years. Kenwood radio memory manager software to manage kenwood radios memories can now be Downloaded from here
J-Pole Antennas
About J-POLE ANTENNAS by Mike Walkington, VK1KCK The J-Pole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. It does not need a ground plane, radials or a complicated matching system. The J-Pole can be cheaply, simply and quickly constructed using a variety of techniques, some of which…
5 Element full size Yagi for 20 meters
The following are construction details of a 5 element 20 meter monobander antenna originally published by VE3GK. However, this particular yagi was run through a computer program and performed very well. It was also scaled to 70 cm on a test range by the late VE3UD, Bud Punchard and the results compared with the computer…
TS-870S Remote control
Freeware Kenwood TS-870 Control Program developed by EC4DFP Download TS-870S.Zip (1.7 Mb)
2 Element Yagi for 50 Mhz
G3SYC designed this antenna in about 1990. The antenna works best between 15 and 20 feet off the ground, and can be worked some nice dx with it. The antenna is easily folded up and stored away when not in use, and has a minimal impact when erected . SPACING Inches ELEMENT LENGTH (Inches) …
HF Mobile multiband antenna
VE3GK posted this interesting project about an HF Mobile multiband antenna. Can be remotely tuned.
A 50 Ohm Dummy Load
This idea came about after listening to all you Amateurs tuning-up your amplifiers while on-air.It always happens right in the middle of receiving a good SSTV picture! This may give you the idea of building your own (cheap) dummy load and do your tuning through this.You can subsitute the shown value components to handle your…