Scott 558T AM/FM tuner - no longer remembers station presets
Before AT&T shuts off my Usenet access, I'll get in my
one last question and hopefully someone can help. Scott 558T digital AM/FM tuner, bought in October of 1983 but probably built a year or two before. It doesn't remember station presets anymore when switched off. I looked inside briefly for a coin cell battery or large capacitor but nothing caught my attention. How did digital electronics of this age remember things when switched off? Thanks all. |
Scott 558T AM/FM tuner - no longer remembers station presets
"cropduster" wrote in message
... Before AT&T shuts off my Usenet access, I'll get in my one last question and hopefully someone can help. Scott 558T digital AM/FM tuner, bought in October of 1983 but probably built a year or two before. It doesn't remember station presets anymore when switched off. I looked inside briefly for a coin cell battery or large capacitor but nothing caught my attention. How did digital electronics of this age remember things when switched off? Thanks all. Usually a backup capacitor. Probably physically near the control microprocessor. Maybe on the front panel under a display tube for example. I'm losing usenet through ATT as well, but I have another binary server I can use. Hopefully they do a little better job of filtering the spam. Mark Z. |
Scott 558T AM/FM tuner - no longer remembers station presets
I have a Lux 5T50 from 1977. It used a small nicad battery recharged when
the unit was turned on. The memory lasted a few days. I later installed a 5V power supply that was on as long as the unit was plugged in. That was later replaced with a supercap. You might look for a small nicad battery. There has to be /something/, but you'll probably have to look closely and patiently. |
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