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1. #FACING OF AN OLD TRANSISTOR RADIO HOW TO#
2. #FACING OF AN OLD TRANSISTOR RADIO FULL#
3. #FACING OF AN OLD TRANSISTOR RADIO SERIES#

If it passed the dim bulb tests then try to power it up directly off the line.You might even hear a crackle or some signals coming through. If the bulb glows dim after a while then there are likely no shorts across the B+ lines within your radio.

#FACING OF AN OLD TRANSISTOR RADIO SERIES#

Replace all electrolytic and paper capacitors with new ones of similar value and same or better voltage rating.There are several flavors of capacitors but the ones that typically decay with age are the electrolytics (usually found in power supply and on audio output circuit) and the wax-paper coupling capacitors. You could cause damage if you power it on before replacing the capacitors. Follow these general steps to restore your radio: This hobby is well within the reach of anyone with basic electronics skills. How-toĪntique radios can be functional statement pieces, showing both your appreciation for the old styles and your ability to repair just about anything. Many even tie the hot end of the line directly to their metal chassis (known as Hot Chassis radios), notably most of the post-war table top radios. Yes, these radios have very high voltage potentials inside.

#FACING OF AN OLD TRANSISTOR RADIO FULL#

TRF architectures are expensive because to maintain a narrow 10 KHz band pass filter across one full octave is challenging and requires more precision than using only one fixed filter that can be mass-produced and is at a lower frequency.īe very careful when working with old radio equipment. Heterodyne receivers cost significantly less than the previous architecture known as tuned radio frequency (TRF), where the radio was simply a very large tunable bandpass filter (3 or 4 sections typically) with amplifiers between each section that had to tune across the entire AM broadcast band. Edwin Armstrong developed the heterodyne receiver that used frequency multiplication to shift the desired signal down to an intermediate frequency where it was filtered and detected resulting in reduced costs and increased access to radio technology. For this reason many listeners resorted to building their own.

In the early days radios were very expensive consumer devices costing as much or more than an automobile or a house in some cases. Plug into history and get your hands on the most influential technology of the first-half of the 20th century! You will learn basic repair/restoration procedures from a different era when it was actually worth repairing consumer electronics.

#FACING OF AN OLD TRANSISTOR RADIO HOW TO#

In this post we will show you how to restore any vacuum tube radio. Last month we showed you how to modify a vintage radio to play your own audio source through it while re-using the existing electronics and maintaining its functionality. Fortunes were made and lost, empires built, epic patent battles ensued, all of which resulted in the world being more connected than ever before, which makes for a really great story (and a great Ken Burns documentary). Before the second world war Radio was a revolution in mass-communication much like the internet today.