« Reply #4 on: September 12, 2005, 02:44:24 PM »
Just curious, what make/model# is the preamp? Is there any other stuff there too? For example, is there a transistor pair before the 833? Are there several 833's arranged as an instrumenation amplfier?
But, the main question is does it sound OK? If so, don't mess with it!
Richard
Actually, its the Reactive Sounds preamp...
I took a snapshot of the circuit board...just not sure if its right to upload the photo to the forum..
Is it single 833 chip? Cool. I've always wanted to know what is inside these boxes. As far as upgrades, I'm not sure. There was some talk about lower power chips (longer battery life), but I'm not sure there is anything that will sound a lot better using a single 9V battery. I'm using a similar design with an OPA 2134 chip, but I don't think it is really any different in quality. At least I cannot hear it.
Richard
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Mics: Sennheiser MKE2002 (dummy head), Studio Projects C4, AT825 (unmodded), AT822 franken mic (x2), AT853(hc,c,sc,o), Senn. MKE2, Senn MKE40, Shure MX183/5, CA Cards, homebrew Panasonic and Transsound capsules.
Pre/ADC: Presonus Firepod & Firebox, DMIC20(x2), UA5(poorly-modded, AD8620+AD8512opamps), VX440
Recorders: Edirol R4, R09, IBM X24 laptop, NJB3(x2), HiMD(x2), MD(1).
** This individual has moved to user "illconditioned" **