Electronics Repair

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audio buzzing after PC is turned off

Pretty simple set up. I have my phono output from my desktop Audiofile 2496 sound card driving an Altec Lansing speaker...
13 comments posted 5yrs
posted by nsd
13 comments posted 5yrs posted by nsd

KVM power

I've never seen KVM switches needing power before and this one (I bought several) has no power supply included. But the...
5 comments posted 5yrs
posted by vjp2.at
5 comments posted 5yrs posted by vjp2.at

CRT peel

I bought an HP 2621a CRT computer terminal in 1980. But about fifteen years ago the screen got black spots like mildew....
5 comments posted 5yrs
posted by vjp2.at
5 comments posted 5yrs posted by vjp2.at

OT: Davtrend CL-19 Linear PSU diagram?

Hi, I marked it OT as nothing needs repairing as such ... Having a tidy up in the study yesterday I took the top of my...
2 comments posted 5yrs
posted by news
2 comments posted 5yrs posted by news

Overcharging the battery

How come my Sandisk Clip Sport says one cannot ovrcharge the battery, but none of my smartphones have ever said that?
15 comments posted 5yrs
posted by NONONOmisc07
15 comments posted 5yrs posted by NONONOmisc07

Panasonic PV-4800 VCR Timer Recording Issue

Hi, My 1988 Panasonic PV-4800 VCR has an issue with Timer Recording. I can set a time to make a recording, turn off the...
12 comments posted 5yrs
posted by jaugustine
12 comments posted 5yrs posted by jaugustine

What is this stuff?

Someone on Freecycle gave me a nice tv, pretty old, but comelete with owners manual and remote control. The remote work...
9 comments posted 5yrs
posted by NONONOmisc07
9 comments posted 5yrs posted by NONONOmisc07

DIY HF loop antenna queries

Technical questions here, but I'm sure someone knows the answer. I recently built a 1 meter diameter three turn loop an...
0 comments posted 5yrs
posted by bostwD
0 comments posted 5yrs posted by bostwD

Source for 784 MHz crystals?

Does anyone know of a source for 784 MHz crystals? I'd like to try to 'accurize' the timer in the HP-45 calculator. -Joh...
18 comments posted 5yrs
posted by john_crane_59
18 comments posted 5yrs posted by john_crane_59

Guitar wiring

Any guitarists? I'm wiring a 3 humbucker "super Strat" like this: Two Seymour Duncan mini-humbuckers in the neck and mi...
1 comments posted 5yrs
posted by user
1 comments posted 5yrs posted by user

Westwind Trantor Hard Disk for Osborne Computer

Can anyone point me to documentation or schematics for this? I have one in pristine condition, until last month when a...
12 comments posted 5yrs
posted by john_crane_59
12 comments posted 5yrs posted by john_crane_59