Electronics Repair

Mains wiring question: Sizing buck-boost transformer?

In USA. Source: 208v, 60 hz, 2-wire (2 phases from 3 phase "Y" supply). Load: 240v, 20A. I presumed that sizing a buck-...

9 comments posted 13yrs

posted by gwprez

9 comments posted 13yrs posted by gwprez

Gain 100 microAmp into 200 microAmp

Hi....I have a broken AF-test unit with an analog 100 miroAmp meter. And th at meter is broken. I have a 200 microAmp-m...

4 comments posted 13yrs

posted by bo-lennart.karlsson

4 comments posted 13yrs posted by bo-lennart.karlsson

micro-miniture IC protector letter codes?

Just for future reference , not blown , but anyone know the full series / letter rating , assuming some sort of standar...

1 comments posted 13yrs

posted by diverse

1 comments posted 13yrs posted by diverse

Recording DVD unresponsive

Panasonic DMR EZ25 , no known history. ps voltages agree with manual slow to respond to buttons like open/close and wil...

1 comments posted 13yrs

posted by diverse

1 comments posted 13yrs posted by diverse

looking for Tek 5A38 & 5B40 manuals

Hi there, in my beloved Tek 5441, I have the named plug-ins, but since I got the 'scope from a university dumpster, I s...

7 comments posted 13yrs

posted by schilling.jonathan

7 comments posted 13yrs posted by schilling.jonathan

Recording tv witha stand-alone DVDR?

I have two friends who got Verizon FIOS TV, but who don't pay rental on the DVDR that Verizon offers. IIUC, they have n...

4 comments posted 13yrs

posted by NONONOmisc07

4 comments posted 13yrs posted by NONONOmisc07

Gee, I need 4185 Solution manuals to ..., can anyone help me?

Sheesh! John :-#(# -- (Please post followups or tech enquiries to the newsgroup) John's Jukes Ltd. 2343 Main St., Vanco...

1 comments posted 13yrs

posted by spam

1 comments posted 13yrs posted by spam

Lasko model 5532 stand up "ceramic" heater

The kids unfortunately paid a lot of money for this piece of crap that now has no display, and just beeps once when plu...

0 comments posted 13yrs

posted by captainvideo462009

0 comments posted 13yrs posted by captainvideo462009

yamaha RX-V365 Receiver

Pressed power button, unit powers off after 3 seconds. Bypassed protection mode by holding "Effect" & "Night" buttons w...

11 comments posted 13yrs

posted by billdegener

11 comments posted 13yrs posted by billdegener

need schematic or pinout for Ungar 9900 soldering station. Wanna use it on a Pace Iron.

I have a Pace tweezer soldering iron. 21V I have an Ungar 9900AS power unit. 24V I'd like to mate them. The 6-pin round...

19 comments posted 13yrs

posted by ham789

19 comments posted 13yrs posted by ham789

WTB VTVM

Hi Folks, I'm working on an old tube radio (Zenith) and could really use a VTVM. I don't have much money at all. I'm lo...

31 comments posted 13yrs

posted by gabe3254

31 comments posted 13yrs posted by gabe3254

Vaio PCG-K23 hard drive replacement.

I have a Vaio PCG-K23 laptop. About 5 years ago I replaced the hard drive for two reasons. I was getting intermittent r...

0 comments posted 13yrs

posted by farberbear.unspam

0 comments posted 13yrs posted by farberbear.unspam

Root cause insight into the common BMW blower motor resistor failures

Does anyone have insight into what is the root cause (and repair) of the FSU failure that plagues almost every 1997 to...

262 comments posted 13yrs

posted by dontaskfor

262 comments posted 13yrs posted by dontaskfor

Re: Trashdown schematics anyone ?

"Arfa Daily" > Anyone got a schematic for the Ashdown 400 watt 'Bass Magnifier' output > stage ? ** The schem for the A...

3 comments posted 13yrs

posted by phil_a

3 comments posted 13yrs posted by phil_a

19" to 21" 4:3 flat-screen televisions?

Sorry if this is the wrong place to post, but it seemed logical to guess that those interested in electronics repair ma...

8 comments posted 13yrs

posted by invalid

8 comments posted 13yrs posted by invalid