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X-12 Mic Preamp with Discrete OpAmps 2520 style
X-12 Mic Preamp Kit
SC-1mk2 with Cinemag Input Transformers, 1u 4-channel
SC-1mk500 Lunchbox Mic Preamps Kit - API 500 Series
White vs Yellow fill paint

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SC-1mk2 and SC-1mk500 Mic Preamp Kits



SC-1mk2 Preamp Kit  SC-1mk500 Lunchbox Preamp Kit 
 Sunday, March 01, 2009
Sunday, March 01, 2009 3:24:17 PM (Central Standard Time, UTC-06:00) (  |  |  |  )
More photos showing discrete opamps installed on the board. You don't need to desolder the 8pin IC socket. Just install the MillMax sockets and the discrete opamp will install with enough cleareance above the IC socket. (You'd need to remove the PDIP8 IC chip.)

with a JFET-992


with APP2050 (Made in Italy)


with APP10 (Made in Italy)

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 Friday, February 27, 2009
Friday, February 27, 2009 3:22:44 PM (Central Standard Time, UTC-06:00) (  |  |  |  )
Image

This preamp was inspired by A certain Preamp Indeed!

But no, it's not a clone. Rather, I'd like to call it my FiveFish version :)

It uses input transformers with high-nickel and mumetal shielding, monolithic opamps and also has the option to use 990/992/2520 discrete opamps, null offset, output transformers, on-board voltage regulators, Relay-controlled -20dB Pads and Polarity Reverse, Soft-start phantom power, LED-lighted push button swithes, Grayhill selector switch, Bourns pot.

It uses a very very low distortion opamp chip for amplification, coupled to a high current, high-slew rate (2000V/us) video buffer driver subjecting that output transformer into submission.

The sound is huge and beefy... it will fight back when pushed hard, and slap you up and down silly to let you know who's boss... kinda like a rock n roll club bouncer.

(VU meter not shown in above photo, 5-LED VU Metering included in kit.)

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 Tuesday, February 24, 2009
Tuesday, February 24, 2009 3:32:26 PM (Central Standard Time, UTC-06:00) (  |  |  |  )
Just finished this unit for a customer... 4 channels of transformer goodness!





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 Monday, February 16, 2009
Monday, February 16, 2009 3:28:27 PM (Central Standard Time, UTC-06:00) (  |  |  |  )







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 Saturday, December 20, 2008
Saturday, December 20, 2008 3:30:14 PM (Central Standard Time, UTC-06:00) (  |  |  |  |  )
What looks better? I can't decide. Help me.

The white paint fill "pops out"... and is very clear and bright. But seems drab and lacks personality.

The yellow has "personality" and not boring like white. But I'm not sure if I like the yellow.

These are Testors model paint by the way.

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