i have a linear amplifier which is using VK200 r.f choke (at input voltage). I would like to ask you which is the maximum current? Because when i operate the linear (7A current) the VK200 r.f choke is very very warm. thank you

 

Hello,

The VK200 inductor is rated for 3 A continuous and 5 A peak.
See the attached PDF.

Bertus

 

hi. i am thinking to replace the vk200 choke with some turns of wire, on ferrite bead.
i have some pieces of this ferrite bead: FB-43-7351 from amidon (43 material)
look here: https://www.amidoncorp.com/items/44
how many turns i must use to have the same inductance with the vk200. i don't know how to calculate the number of turns, and also i don't know the vk200's inductance.
(the circuit is an mw band (600-1800khz) linear amplifier),
and the maximum current is 15A.

 

Hello,

Perhaps this page will give you an idea for making a RF choke:
http://users.catchnet.com.au/~rjandusimports/tut_9a.html

It is a page from this site on RF coils and cores.
http://users.catchnet.com.au/~rjandusimports/

Bertus

 

If i use 4 vk200 (in parallel ) i will use the same inductance or 1/4 inductance, It will work?

 

Hello,

I noticed you have THREE threads open for the same problem.
Lets continue here:
http://forum.allaboutcircuits.com/showthread.php?t=38640

I also moved it to them to the same section.

Bertus