When they first appeared, they literally opened up the world for thousands of people. Like many collectibles, radios offer a piece of nostalgia. In their heyday, they were the primary source of home entertainment, delivering music, drama, news and even soap operas to people’s living rooms. Wells drama, “War of the Worlds. Some buy old radios to accent Art Deco interiors. Some buy them from a particular period while others collect radios made by a specific company. And some even collect radio parts, such as tubes and knobs. By , just about every home and even some cars had a radio.
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I will also detail long vs. I will also get into tube dampers, and how these dampers can greatly improve tube sound and performance in guitar and audio applications. I will also briefly discuss the real meaning of a ‘ NOS ‘ tube, tube faking, and overcharging for tubes by some dealers. European ECC83s are generally sought after for their warm sound with exceptions — Telefunken, for example.
These tubes emphasize even order harmonics, so you get a warmer clean sound, and a very harmonic overdrive sound in a guitar amp which is very pleasing to the ears.
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And, if by chance you actually have any nearly century-old gadgets in your home, how many still work? These are obviously rhetorical questions. Like many tech geeks, I live in a Radio Shack with furniture which doesn’t make my marriage any easier and am the Historian for the Consumer Technology Association CTA , and I don’t own any nearly century-old gadgets, operational or not.
Located in a non-descript warehouse in Hilliard, OH, a mere 20 minutes from downtown Columbus, however, is the Early TV Museum , where you’ll find plenty of nearly century-old gadgets. Arrayed across a dozen carpeted, wood-paneled rooms appropriately reminiscent of your grandfather’s den, are some antique televisions dating from to , as well as some assorted antique TV cameras.
Save one, the portable transistorized Philco Safari , all the sets in the museum run on vacuum tubes. What’s startling beyond the mere scope of this collection of ancient TVs are the five black and white pre-war and four color sets that visitors can actually turn on and view by pushing a wall-mounted button. What you’ll see is programming original to when the sets were available, such as clips from Milton Berle on the “Texaco Star Theater” , or early and still funny “The Red Skelton Show”.
For those of us old enough to remember the tube-based TV past, the nostalgia inside the museum is palpable, the flickering images acting as a time machine transporting us back to our youth. For those too young, there’s the wonder for how we ever survived images so small and fuzzy on such aesthetically obtrusive boxes. But everyone can marvel at the longevity and hardiness of these old sets.
Tomorrow morning, I am venturing down the road to Wilcox Arizona to retrieve a gift. Literally, a gift, as in free. It contains all of the tubes including 4 A’s which are simply wonderful. From what I can tell, this does not have the accordion style doors I had hoped for, but still a very cool transmitter.
Currently new Chinese tubes have limited availability, and are going for somewhat higher prices if you can find them. Meanwhile, after completing the HB I developed a desire to build another linear using s. I’ve always liked the solid look and feel of an , and they have a great legacy – RCA introduced this tube just prior to WWII.
From various sites whose names begin with O or M, and which can lead to S or M with a stranger who may or may not be who or what she claims to be, I’ve had private zones tickled silly, and as often have found the process to be confusing, depressing, or both. I’ve been happily hijacked by a flexible Broadway singer, met a she who was really a he, and even found employment, all through online dating. Then Gregg Allman died, and everything changed. Every solo that Gregg, Duane, and guitarist Dickey Betts recorded on the Allman Brothers Band’s first three albums is burned to memory, collectively holy and magical.
What’s harder to explain is how the Allman Brothers’ music captured the blue-sky joy of such Deep South highways as US Route and Georgia State Route 11, molten asphalt trails that once offered a sense of danger, freedom, mystery, and magic. Can a German-made, tubed integrated amplifier using the recent-production Tung-Sol KT power tube express the warmth of these classic Allman Brothers Band recordings, engineered for Atco by Tom Dowd?
RCA Victor 87T
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New old stock RCA Command black plate vacuum tube in original box. Tube: mint condition Box: good condition Tested on a Hickok Cardmatic B tube tester. The is a ruggedized 6AK5 tube.
It was a time capsule that had been buried in with instructions that it should remain sealed for 1, years. He began his MIT tenure as a research assistant on Project Whirlwind , which was developing a massive high-speed digital computer whose design eventually became the backbone of the American air defense system. Whirlwind was huge, both figuratively and literally. While vacuum tubes rely on heat to get electrons flowing, he envisioned a switch made from materials that can conduct current without electrical resistance when cooled to extremely low temperatures.
These superconductors, he theorized, could be as thin as two single wires and would make it possible to build computers that were just as powerful as Whirlwind—and much more energy efficient—without using bulky tubes. He eventually settled on an easily fabricated design that used two superconductive metals: At or below 4. But pumping current through the coiled niobium generated a magnetic field that caused the tantalum wire to assume a normal rather than a superconductive state, so the researchers could turn the switch on or off using only electrical signals.
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Features one channel and two inputs; volume, bright, treble, treble expander, bass, bass expander, bright switch, deep switch, stand-by switch, pilot light for stand-by and operate. This amp was built to play larger halls and outdoor concerts. The lack of reverb was not a big issue as most live performances had acoustics full of reverberation halls, arenas.
The tubes from the mid s have eight pins and a plastic center key. Some metal may also cover the glass. Tubes dating from the s to s are generally smaller than their older counterparts and have seven to nine pins.
Was it a bomb? Soon I discovered that it had been sent by my friend Roberto Castillo, the crazy telescope builder. I hadn’t ordered one Carefully I opened this nice shipping box. The cabinet was in such a good shape indeed that I could well leave it untouched. I just cleaned away the most obvious dirt, but left some in place: The only “outside” thing I had to do was making two knobs.
Only the concentric knobs at the center were there, while the two side knobs were missing. But in a collector’s handbook I found a photo of a 86T-1 radio, which is the same thing without the magic eye, and that photo clearly showed that the radio’s side knobs were identical to the center part of the concentric knob!
I made two replicas of that center knob by the method outlined in the article about the Belmont radio, and the original look was restored! Inside, things didn’t look so bright. Roberto had told me that the radio was actually playing when he got it. It was just making terrible noises when I got it.
Remember, this is just a basic primer. On the outside, the meter looks like a typical old-fashioned analog meter. Below are a few examples from my VTVM collection.
Bereits vor knapp einem Jahr habe ich hier ein Pärchen RCA 2A3 vorgestellt, welches sich vor allem durch extreme Störgeräuscharmut auszeichnet(e). Lediglich eine leichte “Grobkörnigkeit” bei der Auflösung, die ich ihr damals attestierte, schien sie eher auf der “zackigen” denn auf der seidig-flüssigen Klangseite anzusiedeln.
The log below traces development of the tuner, shown on the right in finished form, from planning through construction and optimization. Background Finding the right components today for a tube-based AM or FM stereo tuner is a real challenge. A typical radio frequency RF product uses a number of high-frequency transformers and coils. Finding replacements for those devices today can be extraordinarily difficult. The coils could be custom-built; however, that raises both the complexity and cost of the project.
Because of these considerations, the concept here will be to utilize the RF transformers and coils from old receivers and build the rest from new parts. This project will utilize printed wiring boards PWBs and ultimately wind up as a show-quality product. As currently planned, the unit will have the following general characteristics: These products are commonly available on eBay and from other sources.
They seem as good a place to start as any. The coils, RF and IF transformers, and variable capacitors will be harvested from the old products and used in the new receiver. This project is challenging in that the mechanical layout is important to success and the front panel tuning dial display is not easy to implement. Having said that, there is no real reason to build this project other than it is a challenge.
Notice the IF transformers and other coils, which will be repurposed in the new tuner.
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ZENITH Although there were many brands of tubes that came and later faded from the scene, such as Cunningham, National Union and Tung-Sol, one unique brand made it mark both with early reliability and its distinctive blue glass envelopes. Pictured above are examples of “Arcturus Blue” tubes from the s. View of our vacuum tube collection which spans through A general sampling of vacuum tubes used in receivers and small transmitters from the s through the s At the center of photo above is a high power final amplifier tube from a large broadcast transmitter.
Tube sockets, connectors and switches used in the era of “hand wired” radio chassis. An assortment of meters and other components intended for use with hand-wired chassis.
May 15, · RCA CT (): The first color TV to be mass manufactured, this inch set first went on sale in April for $1, ($9, today), which sounds about right. And now that the museum.
Not open for further replies. I was wondering if anyone knows a site, or has information that might be interesting in this regard. It seems like the pre-WWII tubes don’t have dates and feature the engraved base. Then around the ‘s they started dating the tubes with the week and year. The code , for instance, would describe the year and the 39th week. Some of the ‘s codes omit the first 5 and are simply three digit codes.
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Electric tuning mechanism adjustment diagram Electric tuning principles of operation and adjustments Electric tuning wiring diagram and further adjustments Replacement parts list Some judicious searching revealed an ad in the August, issue of Popular Mechanics that featured not only the K remote but also W. Fields and Charlie McCarthy. My grandparents bought one of these new, and as a kid, I inherited it.
Finding technicians with the skill to repair old radios can be a daunting task. I cannot personally attest to the competency of these folks, so it’s up to you to determine whether you trust any of them with your “baby. Also repair antique, table-top model radios. Alabama Historical Radio Society alabamahistoricalradiosociety. Antique Automobile Radio Repair members. Antique Radio Club of Illinois antique-radios. We have bi-monthly meetings and regularly draw collectors and enthusiasts from all over the Midwest.
Antique Electronic Supply tubesandmore. We also have an enormous supply of parts, supplies and literature for your vacuum tube equipment. Antique Wireless Association antiquewireless. AWA members come from all walks of life and our ranks include teenagers, octogenarians, and beyond in both directions. At one of our meets, you might find yourself shaking hands with a retired broadcast executive or military electronics specialist, an engineer in a high-tech electronics firm, or an eager young man looking for advice on restoring his first radio.
Art’s Antique Radios myantiqueradio. All of the other stuff was added because K4XL didn’t know how to say “No.
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CRP — Raytheon types The was designed by RCA in response to a particular problem involving radar-controlled artillery pieces. Bouts of intense vibration while firing were rapidly destroying 6SN7GT types in such equipment. The was designed to withstand such stress, and has extra rugged construction with features such as an extra top mica, 5 additional freestanding support posts and a low profile. The was patented in but not produced till This outlandish claim, however, falls apart when you examine the recommended operating specifications of the
The focus of this AM/FM stereo tuner project was to optimize the various elements that went into the product. Cost was a secondary consideration. Still, an effort was made to accurately determine the bill of material (BOM) costs and the time needed to build the tuner.
Establishment by General Electric[ edit ] Company logo in stressed its leadership in international communication. In , the Wireless Telegraph and Signal Company, Limited, was founded in London to promote the radio then known as “wireless telegraphy” inventions of Guglielmo Marconi. As part of a worldwide expansion, in American Marconi was organized as a subsidiary company, holding the rights to the use the Marconi patents in the United States and Cuba.
With the entry of the United States into World War One in April , most civilian radio stations were taken over by government, to be used for the war effort. Although the overall U. Defying instructions to the contrary, the Navy began purchasing large numbers of stations outright. With the conclusion of the conflict, Congress turned down the Navy’s efforts to have peacetime control of the radio industry, and instructed the Navy to make plans to return the commercial stations it controlled, including the ones it had improperly purchased, to the original owners.