I would like to DIY the UA5 oade or similar pre-amp mods. Would be better if the TRS inputs on the Neutriks were left available - but not a necessity. Does anybody have instructions for these mods please?
It is not the OADE mod, but it improves the sound: http://www.cs.uwaterloo.ca/~mannr/UA5/ua5_poorlymodded.jpg
- digimod (described elsewhere)
- replace four i4580 chips with AD8620 or AD712. (I used AD712 for the mic pres, AD8620 for the ADC drivers).
- replace eight 1uF/50V aluminum caps with four 0.47uF poly caps. (Note: you replace two series 1uF caps with a single 0.5uF cap, which is equal, but you disable the TRS inputs in the process.)
- replace two 22uF aluminum caps near ADC with higher quality electrolytic bypassed with 0.1uF poly or film cap
You should be able to follow those steps on the (big!) image I've linked to.
« Last Edit: April 08, 2006, 03:14:28 AM by poorlyconditioned »
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" **