THE UNPRETENTIOUS 45 RPM RECORD
We have used it for years and years. It is an icon of a simple, maybe better time wherein we lived a simpler life...well, maybe for some.
Here on Hot Rods and Jalopies, it's nice to deviate from the usual local history and vintage race cars and this post is no exception. Lots of interesting reading here to scroll on, and click to enlarge as you need to.
45's as we knew them, formally called The 45 RPM Record was developed by RCA Victor in 1949 right after the invention of "vinyl plastic" and the 12" LP record, developed by CBS engineers in 1948. The 45 RPM speed was the only one to be decided on by the most cost effective procedure. Calculus was used to show that the optimum use of a disc record of constant rotation speed occurs when the innermost recorded diameter is half the outermost recorded diameter (hope that makes sense). That is why a 7" single 45 has a label 3 1/2" in diameter. Given the CBS LP vinyl groove dimensions and certain thoughts about bandwidth and distortion, a speed of 45 RPM comes out of the formula....whewww....got it?
To sell their idea against the current "reigning" 78 RPM and the CBS 12" LP, RCA released a series of very low priced 45 RPM "only" record players in the late 1940's and early 1950's. Both amplified and non amplified models were manufactured. The player shown here was sold in the early 1950's
In spite of LP's popularity, the sales of 45 RPM records continued to increase from the 50's and well into the 70's. In their peak sales years from 1973 to 1976, more than 100 million were sold in the USA and Canada each year.
All 45's since 1971 have been pressed in STEREO and actually have had the same fidelity output as CD's (20 Hz to 20,000 Hz)......a credit to the RCA engineers more than 60 years ago.
Many varieties of centers were made so that 45's could be played on a number of different styles of turntables, as you can see here and below.
|The metal ones are the most collectible today.|
On the record label to the left, the triangle center actually came attached to the record and could be knocked out to play on large spindle players. They were produced this way mainly for use by DJ's throughout the 45 RPM era.
Here are some of your favourite 45 RPM record jackets. A regular 45 would have one song on each side, and as time went on, record labels produced EP's which were extended play 45's and would have 2 songs per side for a total of 4 songs per record.
NEXT, CAME THE UNDER DASH RECORD PLAYER
People who check out HR&J from time to time know that we have to add something to do with transportation to the blog posts. The ad shown below was a very popular one in pretty much all hot rod and custom car magazines throughout the very early years of the 45.
|$54.95 was a hefty fee for this back in the early 1950's.|
The following article in two parts pretty much explains all about the under dash 45 RPM record player. Be sure to double click on each of these to enlarge them for reading then come back for more!!
This collage shows some of the ways you can protect your 45's during travel or bringing to a friends place....
I have always had a special place in my heart for the lowly 45 and because of that, I have a huge collection of my own and a wonderful 1952 Seeburg M100C Jukebox I purchased from Howard King of the old King's Stereo to play them on.
Double Click on this last record for a tongue in cheek, never actually produced 45.
Thanks for looking and hope you enjoyed this post.