Electronics Repair

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Is it a capacitor, is it a resistor?

I was asked to repair a Pioneer QX-949 quadraphonic tuner/amplifier. It is a complex beast and one channel had gone dow...
10 comments posted 2yrs
posted by liz
10 comments posted 2yrs posted by liz

6v pilot lamp

Trying to locate replacement bulbs for an old Wards / Airline transistor radio, they are 6.3V but only 20mA rated. High...
8 comments posted 2yrs
posted by tech
8 comments posted 2yrs posted by tech

PSU Ripple

Returning to this Marconi signal generator which has a lot of ripple on the (linear) PSU output, I managed to get probe...
5 comments posted 2yrs
posted by cd
5 comments posted 2yrs posted by cd

USB functionality.

Hi, This photo, https://commons.wikimedia.org/wiki/File:USB-OTG_Setup_IMG_2342.JPG suggests, to me at least, that the p...
11 comments posted 2yrs
posted by peter
11 comments posted 2yrs posted by peter

5p5c coiled cord

My mom got a NorTel phone in 1982 that uses 5p5c for the handset cord. Yes, 5-pin modular, when everything else is 4 or...
0 comments posted 2yrs
posted by vjp2.at
0 comments posted 2yrs posted by vjp2.at

SOurce for right DC power adapters

Seems my mover lost the adapter for a 5" LCD TV. But I have such problems oft'nuf I'd like a source where I can find the...
1 comments posted 2yrs
posted by vjp2.at
1 comments posted 2yrs posted by vjp2.at

rotary dial cap

I got two rotary phoones from sciplus.com years ago Finally unboxed them Got one working fine, but the second one, I mi...
3 comments posted 2yrs
posted by vjp2.at
3 comments posted 2yrs posted by vjp2.at

TOP brand power bars phase error

Last weekend, I found out that a TOP brand power bar on my bench had been configured with a switched live wire to the n...
12 comments posted 2yrs
posted by legg
12 comments posted 2yrs posted by legg

Leaking Electrolytics

Hi all, Using my Peak ESR/Capacitance meter, I was carrying out in-circuit checks on large electros in the linear PSU I...
46 comments posted 2yrs
posted by cd
46 comments posted 2yrs posted by cd

Capacitor Terminals

This cap tested dud across all possible terminal combinations. However, I have to wonder why it's got 5 terminals. Why...
6 comments posted 2yrs
posted by cd
6 comments posted 2yrs posted by cd

do wirelss printers require wifi

My wireless printer shows up on my debian.ubintu/caelinux and android devices, but they don't seem to know to print to i...
2 comments posted 2yrs
posted by vjp2.at
2 comments posted 2yrs posted by vjp2.at

Ripple

So - in the case of a linear power supply - the rectified output of the transformer typically goes straight to a big ol...
13 comments posted 2yrs
posted by cd
13 comments posted 2yrs posted by cd

USB mem to printer

I have a printer with a USB cable connection but not "print from USB" (mem fob) option. Is there a way to print from USB...
4 comments posted 2yrs
posted by vjp2.at
4 comments posted 2yrs posted by vjp2.at