How much current does it take to switch a diode?

[Hidden]

In all of my testing,I keep seeing the same effect.The blocking diode doesn't seem to be doing anything,as far as blocking goes.

From what I've read,diodes limit CURRENT FLOW to one direction only.

So the question becomes, If we are restricting too much current with our choke coils,will the diode even work?

How much current does a diode need to switch on and block current from flowing in the reverse direction?

In my testing the signals going into and out of any diode I test is the same signal.No blocking effect.

Any thoughts on these questions.
Don

[Hidden]

 Don, I'd have to double check to be sure but I think diodes
are switched by a difference in potential (.7V) and not
current flow.

In the wfc vic the secondary coil is the same size as each
choke. All hit resonance at the same frequency and all
coils produce ac. So if you place a probe at ether side of
the diode you'll see the ac from the nearest coil.

Your right about the diode limiting current to one direction,
but in the vic there are 2 kinds of current flow. One is line
current which is the current which flows through all
components. The other is due to the coils equivalent circuit
which is a parallel lc circuit. So all coils have a circulating
 current which is where the ac comes from.

[Hidden]

If my memory serves me,it would take on average .7 volts for the diode to let voltage through,or more than that amount.
But I'm pretty sure that diodes are current limiting only in one direction and not voltage.
I may be wrong
Don

[Hidden]

what are the specs of the diode/s? Maybe we can find a spec sheet online?

[Hidden]

I don't think I ever found a place to buy the Mur1550 so I went with the MUR1560. Here is the data sheet for it, I don't know how close it is in comparison if you are using the 1550.
http://www.digchip.com/datasheets/parts/datasheet/161/MUR1560-pdf.php