THE REFLEX RADIO by Ron Soyland Back in the 1920’s tubes were expensive, usually the most expensive part of a radio. So experimenters wondered if there was a way to make use of a single tube to amplify both the RF signal and then the AF signal, thus getting double use from the tube. This Read more about THE REFLEX RADIO by Ron Soyland[…]

Farm Set Antenna Coil Problem & 3 Coils in the Drawer by Bill Werzner Have you ever had one of those restoration projects that despite having changed out all the old defective and out of spec components, the radio reception still sounds “anemic” for better description? I had one of those on my bench a Read more about Farm Set Antenna Coil Problem & 3 Coils in the Drawer[…]

One of the least understood components found in radios is the common electrolytic capacitor. These capacitors work on a slightly different principle than a simple paper capacitor. When certain metals, such as aluminum, are immersed in an electrolyte (conductive solution) and current is applied, oxygen from the electrolyte oxidizes the surface of the metal forming Read more about UNDERSTANDING ELECTROLYTIC CAPACITORS by Ron Soyland[…]

The Junk Box Preamplifier by Bill Werzner A couple of months ago one of our customers at Vintage Sounds was in need of a not too expensive pre amplifier that could amplify sound from two of his older model turntables to be fed into an older amplifier.  The problem being, was that the output from Read more about The Junk Box Preamplifier[…]