Hobby Electronics Basics

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Connection from camera to TV

Due to a recent theft, I want to get this B/W security camera going. At one time, I had the output going to my TV. The...
9 comments posted 7yrs
posted by scientist77017
9 comments posted 7yrs posted by scientist77017

Lubricate coax connection

It's hard to unscrew the coaxial cable from the antenna. Is there something that can make that easier and minimize corr...
7 comments posted 7yrs
posted by scientist77017
7 comments posted 7yrs posted by scientist77017

Looking for a 7984 valve

I'm thinking of making http://www.arrl.org/files/file/QST/This%20Month%20in%20QST/August%202014/JULSTROM.pdf. Any though...
2 comments posted 7yrs
posted by peterxpercival
2 comments posted 7yrs posted by peterxpercival

Frequency counter

I'd like to buy a frequency counter but I was afraid they'd cost thousands. Apparently, "only" hundreds - https://uk.rs-...
29 comments posted 7yrs
posted by peterxpercival
29 comments posted 7yrs posted by peterxpercival

Teaching Transistor Theory

I've just had a pedagogic revelation! Here it is: Transistor theory is much more effectively taught if explained as a *...
15 comments posted 7yrs
posted by curd
15 comments posted 7yrs posted by curd

Thermionic valve projects?

Here https://www.rapidonline.com/valves there are a variety of thermionic valves. Where can I find projects that utilize...
21 comments posted 7yrs
posted by peterxpercival
21 comments posted 7yrs posted by peterxpercival

Hot air rework station

I bought one of these a while back, but the manual had nothing covering how to use the hot air rework station. Is there...
1 comments posted 7yrs
posted by scientist77017
1 comments posted 7yrs posted by scientist77017

Diagnose circuit board issue

I am trying to diagnose why the door chime no longer works. The receiving unit sounds the various melodies. The battery...
0 comments posted 7yrs
posted by scientist77017
0 comments posted 7yrs posted by scientist77017

Current carrying capacity of wire by gauge size

Having a hard time finding something that isn't rocket science. I thought that since it takes shielded wires to get the...
10 comments posted 7yrs
posted by scientist77017
10 comments posted 7yrs posted by scientist77017

Power Transformer

I plan on selling a 9 lb. Yamaha transformer on Ebay. The box I have is rated at 29 lbs per inch for the edge crush tes...
4 comments posted 7yrs
posted by scientist77017
4 comments posted 7yrs posted by scientist77017

Breakout leads for UK phone plugs & sockets?

My workshop stuff includes many unused phone cables, discarded when their respective phones were replaced over the year...
3 comments posted 7yrs
posted by me
3 comments posted 7yrs posted by me

Pretty useless soldering iron

I bought this thing. It has setting to adjust but it does NOT maintain anything like a set temperature. I left it on on...
13 comments posted 7yrs
posted by scientist77017
13 comments posted 7yrs posted by scientist77017

TV remote has random actions when pushing buttons

My TV remote for a Westinghouse lcd tv is acting strangely. The power button generally works. The channel button will g...
9 comments posted 7yrs
posted by scientist77017
9 comments posted 7yrs posted by scientist77017