At the 4 minute mark he says the 1N37A is the most used. He has a typo; its a 1N34A diode. Note, if you go to Amazon or Ebay many diodes are advertised as 1N34A, but they are not. 1N34A is not a trade mark and, what, you going to sue a guy in China?
The 1N34A or 1N60 are well known germanium diodes, but not the only ones. Buying on Ebay or from china you will get often garbage, like the 1N4148 as a 1N34A "replacement". But often you will get a germanium diode, just with some other name. I used german OA90 germanium diodes with success.
At 04:27 do you mean a 1n34a? A 1n37a is a zener diode. I've tried some of those in the past and gotten poor results at best.
Thanks.
At the 4 minute mark he says the 1N37A is the most used. He has a typo; its a 1N34A diode. Note, if you go to Amazon or Ebay many diodes are advertised as 1N34A, but they are not. 1N34A is not a trade mark and, what, you going to sue a guy in China?
The 1N34A or 1N60 are well known germanium diodes, but not the only ones. Buying on Ebay or from china you will get often garbage, like the 1N4148 as a 1N34A "replacement". But often you will get a germanium diode, just with some other name. I used german OA90 germanium diodes with success.
Why don't all the radio waves in the air interfer with each other.
Simple answer: superposition. The different radio waves do not interact with each other, they can exist next to each other.