« Reply #6 on: December 20, 2005, 03:03:18 PM »
http://sound.westhost.com/project66.htm
anyone ever build this?
looks cool. i'm tempted to try. its over my head, but I like a good frustration from time to time (outside of my wife)
The TLO7x op-amp is outdated. There are better chips out there now. The bi-polar power supplies adds unneccessary complexity. My next homemade pre will be transformer based with small rechargable batteries providing the phantom power. All I need is time and money . Not easy things to come by lately...
Could you suggest a small schematic with a better chip? Or a better chip/opamp for this schematic? I'm not going to buid it aroun the TL07, but if you could tell me a better opamp, I'll try t build it then!
I'm gonna build the small pre with a LM833 and another one with NE5532 and see what happens. I've a small metal candy box and the budget will fit into perfectly. It will be a small and weird preamp as well... XD
I think NE5532 is a good economy choice and OPA2134 is, supposedly, a bit better. I couldn't tell the difference though.
I'm currently working an a circuit based on INA217 or INA103. This chip requires a dual polarity power supply. I'm planning to make this using a single Walmart (9V) battery and an LT1054 inverter/multiplier chip. I'll post here (another blackboard pic!) if I get it working!!!
To the other folks out there. Get over to that workbench and then post your results when you do.
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).
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