S
spasmous2
I am looking for a vendor for a low pass filter for around 20kHz -
ideally it would be variable between around 10 and 100 kHz. The
maximum voltage would be around 2V and it doesn't have to have any
special attenuation properties - just provide some "reasonable" degree
of high frequency suppression.
I was thinking of making one myself using a series inductor in a
shielded box, or a capacitative version, but the cost of the Pomona
box is $150 which seems kind of ridiculous (http://www.tequipment.net/
Pomona2390.asp). Compared with other simple components (e.g. a feed-
thru terminator) I imagined the low pass filter might cost about $20
but can't find ANY vendors except for top-end, high power filters.
ideally it would be variable between around 10 and 100 kHz. The
maximum voltage would be around 2V and it doesn't have to have any
special attenuation properties - just provide some "reasonable" degree
of high frequency suppression.
I was thinking of making one myself using a series inductor in a
shielded box, or a capacitative version, but the cost of the Pomona
box is $150 which seems kind of ridiculous (http://www.tequipment.net/
Pomona2390.asp). Compared with other simple components (e.g. a feed-
thru terminator) I imagined the low pass filter might cost about $20
but can't find ANY vendors except for top-end, high power filters.
