Electronics Repair

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Vintage synthesizers are sometimes cantankerous

I'm building a demo system in my lab, and not one, but _both_ of my HP3325A synthesizers went flatline. One had almost...
3 comments posted 11yrs
posted by pcdhSpamMeSenseless
3 comments posted 11yrs posted by pcdhSpamMeSenseless

Testing an Isolation Transformer

Hi all, Well, I picked up a 500VA mains isolation transformer today: 240v in; 240v out. It's not brand new so I thought...
12 comments posted 11yrs
posted by curd
12 comments posted 11yrs posted by curd

Re: SMPS needing a load to startup myth?

> > Hmm, I keep hearing such things, but so far I haven't come across a > SMPS that will not sit there quite happily su...
4 comments posted 11yrs
posted by robert.a.macy
4 comments posted 11yrs posted by robert.a.macy

Harman Kardon AVR260 amp, 2013

Owner went away for 2 weeks, left the amp plugged in and in standby. Nothing else in the house was affected, but still...
13 comments posted 11yrs
posted by diverse
13 comments posted 11yrs posted by diverse

can i use 5.3volts charger on my psp

hi I have a samsung 5.3v charger and a different kinds of cable charger.. can i use my samsung 5.3v charger on my psp..t...
0 comments posted 11yrs
posted by jhayr08roxas
0 comments posted 11yrs posted by jhayr08roxas

KLH21 that will not tune stations, need help

I have a KLH21 serial # 01237, so it is near the beginning of the run. makes noise like a radio, hiss and all that, but...
3 comments posted 11yrs
posted by Tesla110v , Shell
3 comments posted 11yrs posted by Tesla110v , Shell

call blocker device suggestions?

Enough is enough. My wife is getting upwards of 10 calls daily where no one is on the line when she answers. We have ca...
92 comments posted 11yrs
posted by billa!x
92 comments posted 11yrs posted by billa!x

control box mounting options?

I have a small, 2x4" aluminum control box with some toggle switches and motor direction controls. I need to have the co...
4 comments posted 11yrs
posted by acdfg
4 comments posted 11yrs posted by acdfg

Should I fuse the power transformer secondary?

I have some very old tube amplifiers, which I used regularly until the early 1980's for a home made stereo. Because the...
9 comments posted 11yrs
posted by boomer#6877250
9 comments posted 11yrs posted by boomer#6877250

Measuring EHT

Hi all, On this scope I've been working on there are voltages present (according to the schematic Arfa kindly provided...
10 comments posted 11yrs
posted by curd
10 comments posted 11yrs posted by curd

wiring project

Here goes the 4 winds of heaven. Its duplicable virtue makes it an ideal foundation for the System. ... just fooling ht...
0 comments posted 11yrs
posted by nobody
0 comments posted 11yrs posted by nobody

Sony Bravia TV help

Hi Guys, I've had this Bravia for 2 or 3 years, just know seeing how much is available. Anyway, I want to have cable an...
8 comments posted 11yrs
posted by nojunk
8 comments posted 11yrs posted by nojunk

Need a HD for old system, 10MB to 40MB

Anybody have a Seagate HD and wants it to have a great home? Don't need much memory, nor want a lot, this is for a dedi...
12 comments posted 11yrs
posted by robert.a.macy
12 comments posted 11yrs posted by robert.a.macy

Installing FTDI drivers?

I want to experiment a little with Arduino. Apparently I need to install FTDI scandal. (Who knows by sight which chips...
5 comments posted 11yrs
posted by invalid
5 comments posted 11yrs posted by invalid