Articles
Technical information
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The Multi-Elmac CD-10 Project
In 1958, the Multi Elmac Company was riding high on the ham radio waves. The company had seen an opportunity to provide feature rich but affordable transmitters and receivers to hams itching to "go mobile", which was all the craze. Instead of sticking a converter in front of the car radio like many competitors did, Elmac produced full-blown receive... READ MORE |
ranickels 09/28/2021 |
Vintage Ham Radio |
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Mystery Transmitter
I didn't set out to buy this homebrew CW transmitter, it was included in an auction lot that I wanted so I had to take it to get the desired item. But even though I always like to see good quality homebrew gear, this one is just a mystery. Most of the transmitter, including 6CL6 oscillator and buffer stages and a 6146 PA are built on a sub-chassis that is cle... READ MORE |
ranickels 07/15/2021 |
Vintage Ham Radio |
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The Vector VR-50
Most hams are aware that Herb Johnson W6QKI founded Swan in Benson Arizona to make single-band SSB transceivers and then moved his operation to Oceanside CA where Swan thrived throughout the 1960s. Swan merged with Cubic Corporation in 1967, and Johnson managed Swan as its subsidiary until 1973. Johnson founded Atlas Radio in 1974, with the assistance of Southcom Intern... READ MORE |
ranickels 07/12/2021 |
Vintage Ham Radio |
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Harvey Wells RG-9A / RCA MI-590237 Receiver
The Harvey-Wells Company was formed through a partnership between Clifford Harvey W1RF, and John Wells W1ZD in 1939. Cliff Harvey had earlier founded Harvey Radio Labs in 1933, and prior to that, he was associated with the Hendricks and Harvey Company, another partnership., producing police radios, transceivers, transmitters, and crystals. Their most popular product was the TBS... READ MORE |
ranickels 06/18/2021 |
Vintage Ham Radio |
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RANVerter Pi - SDR Upconverter
I became aware of a few hams playing with a thing designed to receive digital TV in Europe on your laptop - a little plug-in dongle that used an RTL-2832 IC and sold for $20 or so. Some clever fellows had determined that it could be put into "radio mode" in which it would generate an IQ stream over USB, and by writing to control registers in the tuner IC... READ MORE |
ranickels 06/13/2021 |
Technical |
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Hallicrafters AT-10 Antenna Tuner
A while back I acquired a six channel HF transceiver made by the Radio Industries division of Hallicrafters, probably in the 1960s, called an SBT-20. It is capable of 20 watts SSB or 5 watts AM (or CW with an optional board) in the range of 2-12 MHz and thus was probably aimed at commercial and light-duty military applications. The radio could by order... READ MORE |
ranickels 06/07/2021 |
Vintage Ham Radio |
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The Clegg Interceptor receiver and Allbander converter
I'm always thinking about interesting combinations of equipment to try out on the air. One day while rearranging the shack I was getting ready to connect my Globe Scout Deluxe back up with a Collins 51S-1 receiver when the LED (the energy-efficient version of the old light bulb) came on. When I first started playing with DVB-T dongles back in 2012 I wanted an... READ MORE |
ranickels 05/29/2021 |
Vintage Ham Radio |
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6AG7-6LG Novice Transmitter
There's a good chance that more homebrew ham transmitters have been built using a 6L6 than any other tube, and when combined with the superior performance of the 6AG7 oscillator, it's a hard combination to beat (click here for an explanation of the 6AG7's benefits) I'll be adding more info about this project soon, but one of my goals was to reproduce what was a... READ MORE |
ranickels 05/21/2021 |
Vintage Ham Radio |
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Trio Multibander TX-88A
All who operate AM in the midwest know and probably have talked to Masa, AB9MQ, who is a very active AM operator. Having become interested in ham radio while still living in Japan in the early 1960s, Masa's memories of the "dream rigs" is a bit differen than most US hams, and because the markets were still quite regional at the time, much of th... READ MORE |
ranickels 05/18/2021 |
Vintage Ham Radio |
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Hudson American Corporation
I enjoy playing with old marine radios that operated in the AM mode between 2-3 MHz. This was the standard for "ship to shore" radio and telephone service from marine radio operators from after WWII until about 1970 when SSB was phased in and AM became obsolete. Through this era a number of manufacturers were major players includi... READ MORE |
ranickels 05/02/2021 |
Vintage Radio |
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