Hi Gianni
I've done a 2 operational amplifier circuit design:
a high pass filter second order with a passband attenuation -3 dB and
passband frequency 500 hz, 4th order, single power supply
is it ok for you?
Here the link to download:
https://dl.dropboxusercontent.com/u/12325729/high%20pass%20sch.zip
Ivano
2016-04-08 12:06 GMT+02:00 Gianni Pavan
[naturerecordists] <>:
>
>
> Hi Dan, thanks, great and simple. I'll do test with both P48 powering and
> battery powering.
>
> For P48 I'd try with SimplestP48. Alternatives ? (my philosophy is to
> keep as simple as possible)
>
> For usual battery powering which is the simplest circuit design ?
>
> Gianni
>
> 2016-04-08 6:24 GMT+02:00 Dan Dugan [naturerecordists] <
> >:
>
>>
>>
>> A capacitor will do both, roll off the low frequencies and block PIP so
>> you can use your own supply. The smaller the cap, the higher the rolloff
>> starts. Sensitive to the source and destination impedances, so it=92s a
>> custom thing. Start with 1uF and see what happens.
>>
>> -Dan
>>
>> Hi all, EM172 and other capsules with PIP powering are a great resource
>> for building both specialized and general purpose microphones. I some ca=
ses
>> it would be useful to have a high pass filter to limit low frequency noi=
se,
>> e.g. generated by breeze or wind.
>>
>> I would ask to those more expert than me in electronics if it is possibl=
e
>> to insert a simple HP filter in between the capsule and the recorder inp=
ut,
>> eventually also considering to replace the PIP from recorder with a
>> dedicated battery.
>>
>> Gianni Pavan
>>
>>
>>
>
>
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