Dating magnavox speakers
Many of these stereo units show signs of wear and tear from over the years.
They’re all about preserving a part of history that I’m sure many of you can remember. But, our ultimate goal is to restore them to almost like new condition.
Note that many makers also stamped OEM (Original Equipment Manufacturer) part numbers above or below the EIA code, in some cases parts makers or the customer elected not to include the EIA codes, so not all parts have them.
They generally follow the following format: (example) 137 5904 where 137 is the manufacturer code (in this case CTS), 59 is the year (1959), and 04 is the week.
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Like the massive SVT bass rig of the same year, the V Series guitar amps introduced in ’69 were all about rock and roll – big rock and roll, as blasted in stadiums and arenas on major tours – and they cranked it out in a style no amp had done before or has since. ” This is where it comes from; you just aren’t likely to appreciate quite how beautiful until your ears are bleeding!
The 1972 Ampeg VT-22 is the 2×12″ combo of the V Series, and was the sibling, circuit-wise, of the V-4 head and V-40 4×10″ combo.
READ MORECheck out our latest Mid-Century Modern Hi-Fi Stereos that we have recently acquired.
All used four 7027A output tubes to generate a conservatively rated 120 watts, which can often top 140 watts downhill with a good tailwind… And though we say this was a rock-intended amp, it was rock as intended it – bold, punchy, clear, and ungodly loud. Perhaps fewer players than back in the day, but, back when it was introduced, it proved to be exactly what plenty of touring pros required, most notably the Rolling Stones.
The story sometimes goes that the SVT – the bass-amplifying sibling of the V Series guitar amps – was designed “for” the Rolling Stones’ 1969 tour. As such, the band served as beta testers for the new designs.
These are codes often seen stamped on components found in US made vintage tube equipment.
Code formats were not completely standardized, but a little deciphering will generally yield the info of interest.