Intel on mic pre low-cut circuits!

[kags]

This was discussed long ago and linked here - check out the third post…

https://gearspace.com/board/geekzone/356482-easy-diy-passive-filter.html

 

[ruffrecords]

You don't need two in series in each leg unless you want to switch frequencies (but even that only requires pairs of 3.3uF capacitors). For 80Hz you need just a pair of 6.8uF caps.

How big they are will depend on tere voltage rating. You do not need anything more than 100VDC working parts. These are readily available in a 15mm lead pitch:

https://www.farnell.com/datasheets/3673887.pdf

Cheers

Ian

 

[djmiggymigz]

Ahhh okay I dont know why I couldn't find those but with the part number there it is!

Also I deleted the post you were responding to because I realized what I had drawn up would have the exact opposite effect I was thinking! Thanks for the datasheet!

Would 63VDC be acceptable? I dont think there would be any DC after the output transformer.. is that correct?

 

[My3gger]

63VDC should be more than enough because VAC rating for 3,3u and 6,8u capacitors from TDK datasheet is 40V. AC is your audio signal. There's a lot of reading about AC rating of capacitors used in audio circuits.

 

[ruffrecords]

Ahhh okay I dont know why I couldn't find those but with the part number there it is!

Also I deleted the post you were responding to because I realized what I had drawn up would have the exact opposite effect I was thinking! Thanks for the datasheet!

Would 63VDC be acceptable? I dont think there would be any DC after the output transformer.. is that correct?

63VDC would probably do. As you say there is no dc there but there is ac (the signal) so the ac rating is important. 40VAC rating is usually sufficient.

Cheers

Ian