1176LN Kyoritsu front

 1176LN Flashstar front

 

 

 

 

This information was compiled to detail the construction of a dual 1176LN clone based on the mnats 1176 Rev J PCB.

Mic Preamp front panel

A 4-channel microphone preamplifier with lots of options, including bypassable inserts.

This two-channel VU meter was made using the VUM-2 module and a PSU-12 module. It includes a front panel calibration control.

The PSU-12 was designed as a reduced version of the PSU-8, where only two rails and a reduced size were required. It features two adjustable rails using the LM317 and LM337 devices.

The need for a single mono balance monitor for use during mixing cannot by understated.
Whilst you can switch your signal to mono and use your nearfield pair, it is nowhere near the same as having a true mono single speaker right in front of you at the center postition.
This project accepts a stereo balanced input and contains a small power amplifier to drive the mono signal to the 5-inch 4 ohm driver.

A 3-rail (2 x positive and 1 x negative) adjustable linear regulated power supply. This PSU was developed for applications which require two rails for audio circuits (+/- 15V, +30V/-10V etc) and a separate supply for noisy circuits such as LED indicators, relays, logic modules etc. PCB's are double-sided PTH and are available for purchase. Please use the contact form for enquiries.

The HPM-1 module is a high quality headphone amplifier module originally designed to be part of the stereo line mixer project. It features a volume control and 1/4" headphone jack and is powered with a bipolar (+/-16V) power supply.

This audio monitor selector unit was designed and constructed to allow two balanced 2-channel inputs (eg DAW and CD player) to be selected and routed to one of 4 balanced 2-channel outputs (monitor speakers). In addition, trim controls are present on each output, allowing each monitor pair to be trimmed to the same SPL. An attenuator is also present, allowing attenuation from 0dB to -10dB in 2dB steps. This allowed mixes to be produced according to Bob Katz's K System.

The axtparts part management system was developed to keep track of parts and components in an engineering development environment, and allow design documentation to be produced (BOM) utilising the parts. It supports a range of features suitable for use by both hobbyists and professionals and is easily deployed on a LAMP server using a web client as the user interface.

This module takes the balanced stereo pair as XLR inputs and uses the SSM2141 line receivers to crete a single unbalanced signal for each channel. These two signals are then electrically summed and buffered using an NE5532 device. This module was used as the stereo to mono converter for the mono balance check monitor project.

If you regularly have to power up equipment in a particular order ( eg preamps, console, power amps) and power down in the reverse order and want to do it with the press of a single button then this unit may provide the answer.

 If you are having problems getting your newly-constructed 1176 clone calibrating or operating, here's a few things you might like to check to help find the problem.

  1. Audio Bypass Module
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