Self-made components

[dr pepper]

Harry lythall has done some good projects, is that the fm transmitter.
I have a old telequipment 'scope I use now & again, I seem to recall it has gimmicks in it, I spose you could even use them as a trimmer.

 

[Reloadron]

In about 1960 (?) I made a crystal radio. The coil/inductor was made of wire on a toilet paper tube. Like in the picture I had a version that used a razer blade as the diode. Then I got a real crystal.
View attachment 124121

Thanks for the memories. Mine were just about circa 1960 too.

Ron

 

[schmitt trigger]

ronsimpson:

And did you receive any royalties from Motorola?
Guess not..........

 

[Prototype]

I have used pencils to make a carbon arc lamp, does that count?

 

[ChrisP58]

I have used pencils to make a carbon arc lamp, does that count?

I've done the same with the center rod from carbon-zinc batteries.