FiveFish Audio Building Blocks

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FAB2120 – Carnhill Input Transformer Module

This is similar to our FAB2110 Input Transformer Module… but instead of using a CAN type transformer, we’re using a Carnhill/UK Input Transformer, typically used in Neve preamps.

To mount the Carnhill transformer horizontally on this FAB board, a separate Carnhill PCB Adapter is also required.  Both boards will be provided when you purchase this FAB board.

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FAB2000 Series Wiki Documentation Update

Updated the Wiki Documentation page for our FAB2000 Series Modules.

All FABModules related to the Input Section. These will include XLR Female jacks, TRS jacks, Input Transformers, Balanced Line Receivers, Mic Input Modules, Returns, DI (High-Z) inputs, etc

Mic Preamplifier built using FAB Modules

I did a quick test just to see if all the FAB Modules work and play well together.  I’m very pleased with the results…. The modules were quiet, and even with a long signal chain as you can see in the picture, there was hardly any noise I could hear.  (For testing, I hooked up a condenser microphone and connected the outputs to a KRK RP8 8″ Monitors. No humming, no RF noise, nothing.)

Everything works… the logic control Phantom Power, -20dB Pad, Polarity Reverse, and the +6dB Boost (1:2 Transformer Ratio).  To get the FAB4312 Non-Inverting Amplifier working, I hooked up a small 10K potentiometer so I can adjust gain.  For now, I just used a jumper and connected the Phantom Power Logic control inputs directly to a spare V+ terminal on the FAB1215 PSU module.

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FAB1215 – Parts Sourcing Problem put a crinkle on my plans when I learned that one of the part I need for my FAB1215 is out of stock. There’s (22) pcs on order, but they won’t become available until May…. so all in all, it’s not looking good… Mouser may just stop carrying this part suddenly.  I emailed them asking about their future plans for this part, whether they’ll be continuing to carry it or not.


FAB Modules Wiki for Documentation

Category: Promotion
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I’ve successfully setup a Wiki for the FABModules website.  It can be found by going to

The Wiki will be used to store all documentation, tips, techniques, application notes, schematics, diagrams, photos, PDF and Zip files for all FABs.

I’ve decided on using a Wiki instead of the WordPress database for easier maintenance, and more flexibility. It’s also much faster vs. WordPress since all the files are stored as “flat files” in PmWiki, the PHP-based software platform I’m using.

I’m going to try to build the “skeleton” and “framework” for the Wiki page, and populate it with preliminary information. Then I’ll open the wiki to the public so they can add their own stuff and content as we continue to grow.

All Edit access to the Wiki will be “password-protected” but the password will be publicly provided on the Wiki welcome page. I did this to minimize the wiki being spammed by robots, if I just simply provided open access. My thinking is people who are interested will be reading the Welcome page and find the password they need to edit pages.

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