Henry on coils

[waltr]

The forum here is for help with these things.
You just need to be VERY SPECIFIC with questions and then you should get answers.

As to L, C and R values -- there are very general answers BUT details are required for specific answers.

For resonant circuits (oscillators) Increasing the L or C or both decreases the Frequency is about the only General statement I can make.

The other thing you can do is setup circuits on a proto-board then play with values and look at the O'scope to see what the value change does.
This is the empirical method and helps give you a Feel of what values changes do. The ITMD book has many circuit to experiment with and talks through making changes.
Even if your math is good there isn't a substitute for building and plating with the circuits.

[homefire]

In a Tank Circuit lowering the Cap Values the cap can complete it's charge cycle faster raising the Frequency.

[Prospekteur]

Now we are on a good way. And slowly i can get a idea how it works and where to look and work on to experiment with all that things;-) Thanks Homefire, Waltr, Tim.......

"Waltr it is easy for you to say that the math is easy to do, but that is not the case for many people without a tertiary or even completed secondary education. I have ITMD and have now read it twice. As our illustrious authors say, even with the mathematic ability real world results are often not accurate. Therefore it would be good to simply know whether a cap or resistor value should be raised or lowered for a given situation. I am sure many here would innately know and do this, but other than caps in oscillator circuits, I have never seen a helpful reference to other relevant situations. Perhaps building the Raptor will help me understand this better.
I understand that some people who find mathematics easy will be contemptuous about my lateral approach, but that is hardly helpful to the gleaning of knowledge intended by forums such as this.
Perhaps it is just that I cannot see the forest for the trees. Oh well, I shall battle on in the hope that these elusive basics become clearer to me in time."

"Thats exactly what i wanna to say with my only basic english;-) Thanks!"

[Tim]

Very good this thread is helping .