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About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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Mallory Advertisement
February 1947 Radio News Article

February 1947 Radio News

February 1947 Radio & Television News Cover - RF Cafe[Table of Contents]

These articles are scanned and OCRed from old editions of the Radio & Television News magazine. Here is a list of the Radio & Television News articles I have already posted. All copyrights are hereby acknowledged.

What drew my attention with this P.R. Mallory & Company advertisement was not an actual electronic component that they are most noted for - potentiometers, capacitors, switches, metal alloys, and of course batteries (later renamed Duracell). Philip Rogers Mallory began his company manufacturing tungsten wire for lamps. Rather what interested me was the huge variety of standard potentiometer and rotary switch extension shafts. Unlike modern electronics where pots and switches are typically mounted to the enclosure with wires running to the circuit assembly, many older radios and televisions had all components mounted on a metal chassis with control extensions reaching to front-panel mounted dials and knobs. Believe it or not, people are selling these vintage advertisements on eBay; well, at least they're trying to sell them.

Mallory Advertisement

Mallory Advertisement, February 1947 Radio News - RF Cafe

Mallory Offers 12 Clutch Type Controls for use in Auto Receivers

Mallory offers the widest range of resistance values in clutch type controls to fit every need. Four different values are available in the Universal Midget line (100M ohms, 250M ohms, 500M ohms, 1 megohm), and eight values in popular combinations of overall and tap resistances in our Tapped Midget line.

Add these to the Plug-In Shafts you see at the right, and you can replace original controls in any auto set you name - not merely replace them but duplicate them mechanically and electrically. Get the complete story from your Mallory distributor.

You Expect More ...

and Get More ...

from Mallory

No Wobble - this ring prevents it!

All Mallory Plug-In Shafts are made with a small ring as shown above. That's why they can't wobble or work loose - why they fit as securely as a fixed shaft.

Insist on Mallory - the Complete Control Line

P.R. Mallory & Co., Inc.

Mallory

Vibrators ... Vibrapacks* ... Capacitors .. Volume Controls .. Switches .. Resistors .. Filters ... Rectifiers ... Power Supplies.

* Reg. U.S. Patent Off.

Approved Precision Products

P.R. Mallory & Co., Inc., Indianapolis 6, Indiana

 

 

Posted February 23, 2016