Frequency Central Stasis Leak User manual

Frequency central
Build documentation for:
Stasis Leak
Chorus/tap delay/plate reverb
Stasis Leak is a 48kHz DSP effects module, providing a choice of stereo chorus, stereo plate reverb
and tap tempo delay. Stasis Leak is based around a Belton ABE-FX sub board, which in turn is based
around a Coolaudio V1000 chip.
What’s not included on this build doc: How to wire the whole thing together within an enclosure.
Maybe you know this bit already. Some hints on page 4.
Bypass LED resistor Tap LED resistor
Stasis Leak features 2 PCBs:
•Main PCB (schematic)
•Belton ABE-FX, a fully populated SMD PCB which plugs into the Pots ‘n’ sockets PCB
Please observe correct polarity of the electrolytic caps and ICs!

Bill of Materials
33R x 1
100R x 1
1K x 1
3K9 x 4
4K7 x 4
10K x 6
100K x 5
200K x 2
1M x 1
All resistors ¼ watt
metal film.
470pF x 4
100nF x 1
10uF x 3
47uF x 2
Belton ABE-FX
You can buy this from
me, or some other
place.
TL072 x 2
1N4148 x 1
5mm red LED x 2
B100K x 4
Pin Header
SPDT toggle x 1
on/off/on
3PDT footswitch x 1
Momentary
footswitch x1
For Tap Tempo
6.3mm socket x 2
DC socket x 1
1590BB enclosure
Affixing the Belton ABE-FX
The Belton plugs in to the Main PCB using a right angle header (see BOM above). Make sure you
mount the Belton the correct way around (see photos).
Tap Tempo
The momentary switch in the BOM can be used as either push to make or push to break. It’s worth
making sure you know which lug is which before soldering. For this application we need push to
make. See photo below. Connect one lug of the switch to the TAP pad on the PCB, connect the other
lug to ground (Gnd on the PCB). No need to connect the Tap LED to anything other than the PCB.

Main PCB:
Populate the Main PCB front first, as shown on the silkscreen, starting with the lowest profile
components, so:
•Resistors, diode
•IC sockets
•Header for Belton. You will need to space this off the board by 1mm or so. Wedge a credit
card between it and the PCB, then solder it in place. Return the credit card to your wallet.
•Non-electrolytic capacitors
•Electrolytic capacitors
Now populate the rear of the Main PCB:
•Potentiometers, on/off/on switch, LEDs

Building your Stasis Leak into an enclosure
The Stasis Leak PCB is designed to fit into a 1590BB enclosure.
The Bypass LED needs to have it’s pad on the PCB grounded, as part of your 3PDT wiring.
Please note that there are centre holes for the potentiometers on the PCB, you can use these to
mark your enclosure. Probably best to do this BEFORE you assemble the PCB.
Here’s a DXF file
Here’s a drill template:
RDH 06/12/19
https://www.frequencycentral.co.uk/