Electronics Repair

Review of my home broadband router logs (suspicious activity?)

Does this activity found accidentally in my home broadband wireless router log seem suspicious to you? Here is a screen...

73 comments posted 10yrs

posted by pmcook

73 comments posted 10yrs posted by pmcook

how would you use an oscilloscope to measure a sine wave?

There is an old paper where a musician claims to have used an oscilloscope to measure a particular trumpet tone and pro...

27 comments posted 10yrs

posted by timothy42b

27 comments posted 10yrs posted by timothy42b

Does a capital ship sinking actually SUCK a swimmer down to drown?

Is it true (or an urban myth) that a swimmer would be sucked under (presumably to drown) when a capital ship sinks?

48 comments posted 10yrs

posted by mstradbury

48 comments posted 10yrs posted by mstradbury

Fluke 73III fluke repair

A couple years ago I bought a Fluke 73III at a yard sale for $20. Such a deal, I thought. Everything seemed good for a...

9 comments posted 10yrs

posted by nojunk

9 comments posted 10yrs posted by nojunk

NUM 750/760 CRT monitor schematic

Hi This also has part number 0216 900 012. An example is here: http://www.ebay.com/itm/0216900012-NUM-750-760-MONITOR-9...

2 comments posted 10yrs

posted by sonnichjensen

2 comments posted 10yrs posted by sonnichjensen

Not my finest moment....

Ever get a unit torn down completely to replace a part and discover you had ordered a 'similar but different" part inst...

5 comments posted 10yrs

posted by mark_zacharias

5 comments posted 10yrs posted by mark_zacharias

UPS

So what is a recommended UPS based on lack of repair experience? Say around 1000W and say around $150 new. --- news://fr...

4 comments posted 10yrs

posted by x

4 comments posted 10yrs posted by x

Looking for eeprom F25L32QA

This has an ESMT logo and F25L32QA on one line and D301W on another. Googling only returns hits for programmers that ca...

10 comments posted 10yrs

posted by ohger1s

10 comments posted 10yrs posted by ohger1s

UPS Battery Replacement

Replacing an APC UPS battery pair labeled CP1290 12V 9AH. The unit has two confusing labels: on front is XS1500 and on...

9 comments posted 10yrs

posted by X

9 comments posted 10yrs posted by X

Golden Rules of Troubleshooting

Anyone care to share their experience on the correct approach to troubleshooting? I'll kick off by suggesting: 1. Assume...

66 comments posted 10yrs

posted by curd

66 comments posted 10yrs posted by curd

Marguerite Sound Studios, 1930s/40s UK, any info

Had another go at trying to identify an "LP" sized disc I picked up somewhere. I found this reference http://www.ips.or...

18 comments posted 10yrs

posted by diverse

18 comments posted 10yrs posted by diverse

need a source and information on a 288-5336 audio amplifier IC

I have two audio amplifier modules I scrapped out of an 8 track player many years ago. I use these to amplify the headp...

2 comments posted 10yrs

posted by captainvideo462009

2 comments posted 10yrs posted by captainvideo462009

lazy repair

One of my test power supplies in a rather large switching unit from Power One in the SPM5 series. It's basically a main...

0 comments posted 10yrs

posted by presence

0 comments posted 10yrs posted by presence

Replace Li-Ion cells in battery pack?

have an 18V 2.4AH battery pack for Ryobi power tools that will no longer take a charge and that the charger indicates i...

17 comments posted 10yrs

posted by Nobody

17 comments posted 10yrs posted by Nobody

recommend lunch with contractor(s)?

I guess bar-b-que, burgers, fried chicken and french fries are great, but n ot if you are wearing a buttoned-up shirt t...

15 comments posted 10yrs

posted by mogulah

15 comments posted 10yrs posted by mogulah