On eBay Now...

1923 S.G. Brown Mechanical Amplifier For 1-Tube Radios & Crystal Sets * Works For Sale

1923 S.G. Brown Mechanical Amplifier For 1-Tube Radios & Crystal Sets * Works
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Buy Now

1923 S.G. Brown Mechanical Amplifier For 1-Tube Radios & Crystal Sets * Works:
$750.00


If you're an uncompromising collector of antique technology, make sure to check out all my listings after you look at this one. I don't think you'll find a better, broader or more balanced assortment of technical antiques anywhere -- hundreds of listings each year, almost all of them featuring eye-popping "gee whiz" gadgetry in exceptional original condition. And don't forget, you can click this link to quickly add and then save me to your favorite seller list and will automatically send you updates when I put similar new listings online.
Here's a beautiful, working S.G. Brown "Microphone Amplifier" manufactured in London in the early 1920's. These compact, elegant, brilliantly engineered tubeless amplifiers were designed to provide a single stage of audio amplification for British crystal sets, amplifying weak signals so they could be heard through headphones, but they can also be used for one-tube radios that lack an amplifying transformer.
Condition of the amp is excellent, as you can see in the pictures. Cabinet finish is original, lid card is original, all hardware and fittings are original. When connected to an appropriate input source and 6v DC, the amplifier will power a pair of headphones or (with modest output) a sensitive, high impedance 1920's horn.
In the video I've posted above, the amp is powering a Burns horn speaker whose input is coming from a Commerce crystal radio. You are buying only the Brown Amplifier.Shipping weight, properly packed, will be about 7 lb.
I'm one of 's best known, most highly regarded sellers of antique radios, and I specialize in radios from the 1920's. I've been selling and shipping them for more than 25 years. When you purchase an antique radio from me, you'll receive a radio that arrives safely because it's been carefully packed (by me, not by some well-intentioned but nonetheless confounded, doe-eyed teenager working at the UPS store who wouldn't know a radio from a radiator), Sure, you can probably get a lower price from Joe and Janet Barn-Find, but when your "bargain" arrives broken, and without any hint of how you might be able to put it back together, you'll realize that you really do get exactly what you pay for.
Buy Now

Popular

Recent Posts