Articles and radio trivia from VK3CAE...
Antenna related articles
Here is a brief paper of mine about the standard UHF coaxial connectors found on a lot of UHF type Amateur and CB radio gear... Just how bad are they at these frequencies?
Path Loss at VHF, UHF and Microwave frequencies. A free Space graphical representation that can model real world systems with examples plotted at amateur frequencies.
Can't fit that 80m antenna into your yard, here's a practical example of coil loading a dipole to obtain a 50% reduction in length without a large signal loss (>1/2 S point).
Upgrade notes and revised Schematic for the MDRC Mark 4, 20 Amp, Power Supply. This unit is still popular, as you can use recycled bits for most of the construction.
A wide band pre amp for SWL and Scanner use from VLF to beyond 1000 MHz using a Mini Circuits monolithic amplifier...
Antenna Tuning Unit (ATU) using the T-Network approach. Building an ATU can be fairly straight forward but there's some important considerations that must be made when sourcing components.
Vintage Radio receivers and transceivers
A Brief History of the FT-101, some words on the popular 1970's Yaesu Amateur transceiver.
Are you, like myself, interested in The Wadley Loop HF Receivers of the 1960's and 70's?
Eddystone EC10 Communications Receiver... A look at the prolific 1960's and early 70's solid state communications receiver. Eddystone produced thousands of these over a 13 year period.
The McKay Dymec DR 22 Communications Receiver is not quite a vintage box yet but what's a year or two when you're talking about such a unique example of early PLL receiver technology.
Repair and Modification notes from my collection (more to come)
The Kenwood TS-680S HF + 6 Mtr amateur transceiver, a collection of tested modification notes.
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