I bought these on ebay the other day thinking that if they were chokes, they would be labled as such. After reading a question here the other day, I gotta ask... I'm building a Colpitts oscillator....Thanks for the help.

http://cgi.ebay.com/80-pcs-8-value-1uH-1mH-color-wheel-inductors_W0QQitemZ220466281597QQcategoryZ36338QQcmdZViewItemQQ_trksidZp4340.m263QQ_trkparmsZalgo%3DSIC%26its%3DI%252BC%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%252BDDSIC%26otn%3D10%26pmod%3D250701039404%26ps%3D63%26clkid%3D5243439749842248994

 

U need to give us more info on what you have , what you know and please show us the schematics

 

The link I provided shows some "inductors" from a chinese company. I was wondering if they are really chokes or "filters", and unsuitable for a colpitts oscillator?

 

Those are common encapsulated inductors and will work fine.

A choke is just an older term for an inductor but still used and still the same thing, however when I think of a choke I think of something large with a core made to filter a power supply but that's only because I was around in the tube days.

Of course we used the term interchangeably back then too, just a few turns of wire in an air-core situation could be referred to as a radio frequency choke.

 

Purrrfect!! thanks!!

 

The term 'choke' is more of an application than it is a device. The term was common place years ago in power applications where one needed a filter or 'trap' to reduce noise or slow slew rates.

 

Hello,

Take a look at the PDF on RF-proto typing (attached).
On the pages 8 - 10 there are the "chokes" discussed.

Bertus

 

Thanks! I remember the professor talking about digital grounding, and traces acting as antenna's, but I guess I never put it together to de-couple it with an inductor.. Thanks all for the great info!!!