Hobby Electronics Basics

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component identification please

I have searched google but cant identify these two components. I think they are Diodes. they look like Diodes, Black wi...
11 comments posted 7yrs
posted by stevwolf58
11 comments posted 7yrs posted by stevwolf58

Terminology

You may have seen me rail against how the schools teach that inversion is t he same thing as 180 degrees out. Out of ph...
4 comments posted 7yrs
posted by jurb6006
4 comments posted 7yrs posted by jurb6006

DAB radio kits?

There are plenty of AM and FM radio kits (= bag of parts and solder it yourself), but are there any DAB radio kits? --...
0 comments posted 7yrs
posted by peterxpercival
0 comments posted 7yrs posted by peterxpercival

Re: More Math I Never Did

>> >>I almost dumped this thing. The question was, in part, how the answer got to be in milli or micro, but I looked an...
11 comments posted 7yrs
posted by default
11 comments posted 7yrs posted by default

Re: Cheap new device to pull capacitors from?

>On second thought... I wonder if used components on fleaBay would be >the best place to get legitimate filter/bypass/d...
9 comments posted 7yrs
posted by default
9 comments posted 7yrs posted by default

talking multimeter

Hi all, A member of our radioclub is starting to have problems with his eyesight, so he is looking for a multimeter tha...
7 comments posted 7yrs
posted by kristoff
7 comments posted 7yrs posted by kristoff

Cell phone fast charging circuits

Hello, My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret h...
6 comments posted 7yrs
posted by mrdarrett
6 comments posted 7yrs posted by mrdarrett

Speaker efficiency?

Since I will be playing a low wattage tube amp through speakers it seems that high efficiency speakers are in order. How...
12 comments posted 7yrs
posted by etpm
12 comments posted 7yrs posted by etpm

Serious stereo tube amp questions.

I have always like exposed tube equipment. Since I was a little kid. So I have been thinking about getting a small ster...
7 comments posted 7yrs
posted by etpm
7 comments posted 7yrs posted by etpm

tool to use to draw an electronic circuit

Hi - if I want to show you an electronic circuit I have a question about, what tool do you recomend me to use ? Thanks.
7 comments posted 7yrs
posted by sebastiasebas
7 comments posted 7yrs posted by sebastiasebas

solar cell how to measure output current

Hi - I got a brand new solar cell "Eco Line ES10M36". In my garden, under full sun it provides 21 volts and 500 mA, and...
13 comments posted 7yrs
posted by sebastiasebas
13 comments posted 7yrs posted by sebastiasebas

Oscillators without transistors

Hello, What are some examples of oscillators which don't require transistors or vacuum tubes? So far I found relay osci...
24 comments posted 7yrs
posted by mrdarrett
24 comments posted 7yrs posted by mrdarrett

Tube amp question

I see lots of tube amps with the tubes mounted such that they point down. This means all the heat rises up into the cha...
14 comments posted 7yrs
posted by etpm
14 comments posted 7yrs posted by etpm