need help in rf choke

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Amro eid

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hello
i need to know how can i make rf choke for 3.5mhz
it is connected between +b and plate it function allow
the dc to flow and prevent lossing of rf signal is this right?
rf choke which i need is 2.5mh at 3.5 mhz
is there any formula for coil turns,diameter, impedance etc to make
thanks
 

I don't know if it is too low freq. for a choke?
 

thanks
vfone it is useful link

fxxjssc
not low it depend on the first stage osc crystall and add rf amp and it works good
i get it through 300 turne at 1 inch air core i see the osc with scop after 300
i get the max impltude

regards
 

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