I really love the sound of 45s, despite their many problems, because of the different and often hotter mix.
Now with digital editing tools it is amazing just how good they can clean up.
Hot water, dish detergent, isopropyl alcohol, and a brush still removes over half the noise.
But when you get one cleaned up and put it on the AM over-the-air it's magical to listen on a 60's car radio.
The AM car radio was at its height of development in the early 60's, when they were just getting rid of last of the tubes,
which by then worked on 12volts with no vibrator for high volt DC. Both the last tube radios and the very first transistor types
often had little or no high frequency "rolloff" caps, save those in the detector section for filtering RF out.
The selectivity of the AM front-end and (with or without RF amp) and the 2 section IF amp gave 18-20 khz wide response with
pretty steep slopes. This meant that with your tone control which when cut REAL hard gave about a 2khz cutoff, you could
enjoy 20-15000 hz reporduction in full-reproduction when slightly side tuned, or center tuned and dull sounding.
If you were listening to a big local, you never heard side channels, but it sure was hi-fidelity on the high frequency end if you
were a little off center, as was usually the case. Most people would at least tune to where it wasn't raspy, and within that range there
was a very wide range that sounded very good. You could tune up or down to avoid a splattered upper or lower sideband.
New digital tuned radios unfortunately don't offer this. Too bad, they could sound so much better if only the
people who make such radios would design a truly analog tracking voltage to the oscillator and tuning diodes......
Anyway, don't discount just how good (not loud) car radios of that day did sound.
The peculiar quality added by the big germanium output transistor ?% harmonic distortion is oddly pleasing....
Now with digital editing tools it is amazing just how good they can clean up.
Hot water, dish detergent, isopropyl alcohol, and a brush still removes over half the noise.
But when you get one cleaned up and put it on the AM over-the-air it's magical to listen on a 60's car radio.
The AM car radio was at its height of development in the early 60's, when they were just getting rid of last of the tubes,
which by then worked on 12volts with no vibrator for high volt DC. Both the last tube radios and the very first transistor types
often had little or no high frequency "rolloff" caps, save those in the detector section for filtering RF out.
The selectivity of the AM front-end and (with or without RF amp) and the 2 section IF amp gave 18-20 khz wide response with
pretty steep slopes. This meant that with your tone control which when cut REAL hard gave about a 2khz cutoff, you could
enjoy 20-15000 hz reporduction in full-reproduction when slightly side tuned, or center tuned and dull sounding.
If you were listening to a big local, you never heard side channels, but it sure was hi-fidelity on the high frequency end if you
were a little off center, as was usually the case. Most people would at least tune to where it wasn't raspy, and within that range there
was a very wide range that sounded very good. You could tune up or down to avoid a splattered upper or lower sideband.
New digital tuned radios unfortunately don't offer this. Too bad, they could sound so much better if only the
people who make such radios would design a truly analog tracking voltage to the oscillator and tuning diodes......
Anyway, don't discount just how good (not loud) car radios of that day did sound.
The peculiar quality added by the big germanium output transistor ?% harmonic distortion is oddly pleasing....