Radio Articles

The Troubleshooter - "Identifying Power Transformer Windings" new
Unfortunately, many of the older transformers, especially those with woven cloth insulation on the wires, lack any kind of color coding for winding identification.  Many years ago one of our HVRA members described how he identified unknown windings using a volt ohmmeter and a 25 Watt light bulb. 

Shop Talk - "The Black Plague in I.F. Transformers"
If you have never heard of the "black plague" then don't feel too bad - this malady has only recently been identified and addressed.

Shop Talk - "Polarized Plugs - AC Line Safety"
Those old radios are great, but sometimes we forget they weren't as safe as we now expect them to be. I still remember a shock I received from a television knob when I was a bare-foot kid! Learn how to properly install a new line cord on your radios.

Shop Talk - "Application of Wrinkle Paint"
Learn how to duplicate the wrinkled finish on the old metal radios. Various members of the Internet radio community discuss their techniques.

Shop Talk -" Zenith I.F. Problems"
Little-known facts about Zenith interstage radio frequency transformers and how they may affect sensitivity and the tuning eye.

Shop Talk - "Transformer Construction in Early Radios"
Explanations and remedies for bad interstage transformers in early battery sets.

Shop Talk - "Charts and Conversion Tables"
Charts for resistors, capacitors, miniature lamps and tubes. All sorts of conversions to assist calculations.

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