- Wacky radio. - 1 Update
- Battery rejuvenate - 2 Updates
| micky <NONONOmisc07@fmguy.com>: Jan 05 09:45PM -0500 In alt.home.repair, on Tue, 04 Jan 2022 23:42:49 -0500, Michael Trew >> the 4 or 5" dial and would control where the dial stopped when you >> turned it.) >Cross-posting to REC.ANTIQUES.RADIO+PHONO Thanks. I didn't know about that group. I hope someone replies. >> of the power they use is for the speaker driver, right? >> But after a year there was a power failure and when the power came back >> on, it would turn off after, I guess, 24 hours, Regarding this strange change, I just noticed that I had turned one of the alarms, not the buzzer part but the radio. If the buzzer went off, I'd hear it, but not the radio if I'm listening anyhow. Maybe when it's just plain On, the alarm turns it on again but this time it's built to only stay on for 24 hours. ?? I don't know but I turned the alarm off. |
| ehsjr <ehsjr@verizon.net>: Jan 05 12:05PM -0500 On 1/4/2022 3:36 PM, Mike wrote: > Any fixes are low-reliability, short-duration, and not something > to rely on. Ultimately, you'll find the cells bulging out > of their case ... just scrap (recycle) them. +1 |
| bob prohaska <bp@www.zefox.net>: Jan 06 02:32AM > What can be done ? > What charger might be needed ? > Steps by step please. Ok, here's my $.02 8-) If they need to work well, replace them. If you just want to play, here's what I'd try: Get a dumb charger (I use a Schumacher with 2 and 6 amp ranges). Get a tungsten filament bulb (I use an 1157 dual-filament auto taillamp bulb) for batteries of "normal" size, 2-20 amp-hour. Get a voltmeter that you trust, or can check against another similar battery. Connect the voltmeter to the battery. Connect the negative side of the charger to the negative battery post. Connect the positive side of the charger to the base of the bulb. Identify the contacts on the bottom of the bulb, selecting the small filament for little batteries (~2 amp-hour) or the large filament for automotive-sized batteries and connect that terminal to the positive post of the battery. Set the charger to the upper, say 6 amp, range. Get a sheet of notepaper, write down the time and the voltage, then turn on the charger and record both voltage and time over the next few hours. You'll have to decide how often, based on how fast the voltage changes. What you're looking for is a fairly quick (hours) ramp to about 13 volts, a slow climb (days) to 14 volts and a leveling-off at less than 15 volts. If you see that pattern, the battery is taking a charge. If the voltage won't reach 13, turn up the charger or use the bigger filament. If the voltage goes over 15, turn down the charger or use the smaller filament. Once the voltage has stabilized at 14-15 volts, let it stay there for a day, then disconnect the charger. Voltage should fall to 12.5-13.5 and stay in that range for a day. If it does, use the bulb as a test load and repeat the voltage/time measurement. An 1157 bulb passes about half an amp on the small filament and about 2 amps on the big filament, so that gives a crude measurement of capacity. You might get 10% of rated capacity, most likely less. Have fun, bob prohaska |
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