Electronics Repair

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Testing gel cells

Any thoughts about the best way to test a lead-acid gel cell? I am plottin g the construction of a device that will dis...
28 comments posted 12yrs
posted by mc
28 comments posted 12yrs posted by mc

Using a UPS with non-computer equipment

Can anyone suggest suitable modifications for using an old APC UPS (Back-UP S 500, BK500MC) with non-computer equipment...
6 comments posted 12yrs
posted by mc
6 comments posted 12yrs posted by mc

partial temporary non-working of remote control

Has anyone here ever noticed that some functions on a tv, dvdr, or vcr can be performed when the remote control batteri...
3 comments posted 12yrs
posted by NONONOmisc07
3 comments posted 12yrs posted by NONONOmisc07

Mitsubishi HS-M55 VCR VFD display tube

Hi all, as my recent time-waster electronix project I'm troubleshooting a Mitsubish i HS-M55 VCR which actually works f...
10 comments posted 12yrs
posted by ganjatron
10 comments posted 12yrs posted by ganjatron

Damned ink cartridges

I have an Hp ink jet printer that uses two cartridges. There is one three c olor, and one black cartridge, a number 21....
13 comments posted 12yrs
posted by captainvideo462009
13 comments posted 12yrs posted by captainvideo462009

Explain pump motor start switch

Hi all, I helped my neighbor disassemble a pump motor, we had to remove the centrifugal assembly from the shaft. The ce...
6 comments posted 12yrs
posted by nojunk
6 comments posted 12yrs posted by nojunk

How to determine the frame rate of a pc?

Feeding to an external monitor with 1600x1200, the image is locked but feeding a colour bar test signal in, its as thou...
10 comments posted 12yrs
posted by diverse
10 comments posted 12yrs posted by diverse

Oktava Mk-012 microphones

Expensive Russian mics. Is there any pitfalls about getting inside the XLR barrels? eg threadlock on the obvious screws...
5 comments posted 12yrs
posted by diverse
5 comments posted 12yrs posted by diverse

Fast charge vs. regular charge

I went out to buy a charger for one of my digital devices. All they could sell me was a FAST CHARGER. What is the diffe...
11 comments posted 12yrs
posted by michael.muderick
11 comments posted 12yrs posted by michael.muderick

LED LCD TV SMPS thermo fault

I have a Kogan 42" LED LCD TV that loses back-light after about 50 minutes running time. After cooling down it works fi...
10 comments posted 12yrs
posted by nomail
10 comments posted 12yrs posted by nomail

OT? Lightning

OT? A couple days ago I'm outside and there's a heavy rain with lightning not that far away, and suddenly the question...
20 comments posted 12yrs
posted by NONONOmisc07
20 comments posted 12yrs posted by NONONOmisc07

Marshall JCM900, 4100, of 2006

Dead amp. It never looks right,to me, to use 1/3W anode dropper resistors, even if high voltage type. Did Marshall stop...
2 comments posted 12yrs
posted by diverse
2 comments posted 12yrs posted by diverse

Battery life

I work on various alarm systems that use mostly two 12.0 volt 7.0 or 8.0 AH rechargeable lead acid gel cell batteries i...
36 comments posted 12yrs
posted by captainvideo462009
36 comments posted 12yrs posted by captainvideo462009