L´Andratté
Well-known member
Hi everybody!
I want to build two mic preamps with fet input opamp in the first gain stage, the schematic asks for jensen jt115-ke which are over my budget for now, so could I use, as placeholders, the mentioned and (recently discussed http://groupdiy.com/index.php?topic=63432.0) cheapo neutriks, provided additional shielding?
I think so, since the impedances are 200:50k (wired as 1:10 ratio) and the frequency range is 20hz-20kHz. Max. input -6dB (not great but ok, I think).
Apart from the subjective sound which is hard to predict, would this be a technically correct replacement or have I overlooked something important, like dc resistance etc.?
Thank you for any hint or comment!
datasheet
https://www.monacor.com/de-de/monacor/produkte/beschallungstechnik/signalverarbeitung/signaloptimierung/nte-10-3/?r=pdf
can
http://uk.farnell.com/oep-oxford-electrical-products/a262can/screening-can-transformer/dp/1172345?ost=OEP&selectedCategoryId=&categoryId=700000096003&searchView=table&iscrfnonsku=false
Preamp schematic (for reference, not to be discussed in this thread)
http://www.recordingmag.com/resources/resourceDetail/332.html
I want to build two mic preamps with fet input opamp in the first gain stage, the schematic asks for jensen jt115-ke which are over my budget for now, so could I use, as placeholders, the mentioned and (recently discussed http://groupdiy.com/index.php?topic=63432.0) cheapo neutriks, provided additional shielding?
I think so, since the impedances are 200:50k (wired as 1:10 ratio) and the frequency range is 20hz-20kHz. Max. input -6dB (not great but ok, I think).
Apart from the subjective sound which is hard to predict, would this be a technically correct replacement or have I overlooked something important, like dc resistance etc.?
Thank you for any hint or comment!
datasheet
https://www.monacor.com/de-de/monacor/produkte/beschallungstechnik/signalverarbeitung/signaloptimierung/nte-10-3/?r=pdf
can
http://uk.farnell.com/oep-oxford-electrical-products/a262can/screening-can-transformer/dp/1172345?ost=OEP&selectedCategoryId=&categoryId=700000096003&searchView=table&iscrfnonsku=false
Preamp schematic (for reference, not to be discussed in this thread)
http://www.recordingmag.com/resources/resourceDetail/332.html