2 N type Jfets as ac switch

[levnu]

hello,

i try to put two jfets back to back and to block
ac signal between 0-10 voltage peak to peak

when i tried to input in Vgs a 4volt dc signal i could block just till 8 peak to peak
signal bigger then that started to pass throw

is it possible to block 10p-p with 4v dc?
is it connected to some requirment for Vgd?
should i chose a jfet with high or low Vpinch off?
should i use N-type for being able to work till 25 Mhz without falling in amplitude?
are there some types could be suggested

thanks forward
Arye

 

[inventor(y)]

How are you driving your fet's? Can you post a schematic?

 

[levnu]

ok now i did now the question i have is
the transistor 2N5486 can it work with low frequacies too
or just high
i mean what its it band width??
thanks a lot
Arye