Hobby Electronics Basics

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Tube (valve) amp really works!

Some time back I posted a question or two about this tube headphone amp: http://oatleyelectronics.com/files/K272X.pdf ....
39 comments posted 9yrs
posted by etpm
39 comments posted 9yrs posted by etpm

Orange super-bright LEDs

Are they true orange LEDs? Is "orange" the same as "amber"
32 comments posted 9yrs
posted by toylet.toylet
32 comments posted 9yrs posted by toylet.toylet

BLDC motor questions

Awright youse motor folks, I need info. I have, over the last couple years goofed around with BLDC motors made for RC h...
19 comments posted 9yrs
posted by etpm
19 comments posted 9yrs posted by etpm

Tubes in broken spotwelder & other questions

All, I know almost nothing about tubes(AKA valves). My son bought a capacitor discharge spotwelder that uses tubes. It...
31 comments posted 9yrs
posted by etpm
31 comments posted 9yrs posted by etpm

JFET mini-comparo--BFT862 not actually unique

I promised a bit of low-noise JFET comparison data. I looked at 4 BF862s from different reels, three ON Semi parts, the...
2 comments posted 9yrs
posted by pcdhSpamMeSenseless
2 comments posted 9yrs posted by pcdhSpamMeSenseless

Transistor part number suffixes--215? 235? Whazzat?

So I bought a reel each of BF862-235 and BF862-215. Other parts seem to have the same suffixes, but a quick web search...
11 comments posted 9yrs
posted by pcdhSpamMeSenseless
11 comments posted 9yrs posted by pcdhSpamMeSenseless

Question on JFETs

Hi all, I can't find much info on JFETs in my books which don't seem to go into much depth. They go into much detail, h...
31 comments posted 9yrs
posted by cbx
31 comments posted 9yrs posted by cbx

ENGLISH BULLDOG PUPPIES

ENGLISH BULLDOG PUPPIES Very cute, social and lovely male and female Puppies are here! These puppie s make excellent co...
0 comments posted 9yrs
posted by melleygarcia
0 comments posted 9yrs posted by melleygarcia

EMP Won't Work On the Rooskies

They are using vacuum tubes at all their phased array radar installations. http://www.fool.com/investing/general/2015/05...
9 comments posted 10yrs
posted by bretcahill
9 comments posted 10yrs posted by bretcahill

Repeater Router Eliminates Messy Wire Connections?

If you don't want ethernet cable strung all over the house can't you just get a repeater router and plug the ethernet li...
8 comments posted 10yrs
posted by bretcahill
8 comments posted 10yrs posted by bretcahill

a stupid question

I have one of those vehicle loop detectors installed on my property. Same kind that operate traffic lights. To test it...
17 comments posted 10yrs
posted by default
17 comments posted 10yrs posted by default