Frequency Central Continuum Phaser ii Manual

Build documentation for:
continuum phaser ii
An original design by
Frequency central
Rev 3 / May 2014
Main PCB: Panel PCB:
Key to PCB screen print:
n: This signifies NPN BC547 transistors. Note the correct pinout as shown by the half circles.
p: This signifies PNP BC557 transistors. Note the correct pinout as shown by the half circles.
Please observe that the TL084 is ‘the other way round’ with respect to the LF351 and 2 x
LM13700.
Please observe the correct polarity of the 2 diodes and 8 electrolytic capacitors. The 6 x
22uF are configured in sets of 2 back to back (negative to negative).

The PCB shows the correct orientation for BC547/BC557. Other transistor types can be used
(eg 2N3904/2N3906), but please observe the correct pinout.
Bill of materials
100R x 1
1K5 x 1
1K8 x 4
10K x 18
15K x 2
27K x 11
100K x 6
150K x 1
270K x 1
1M x 1
4n7 x 1
10n x 4
47n x 1
22uF electrolytic x 6
47uF electrolytic x 2
LF351 x 1 (or TL071)
LM13700 x 2
TL084 x 1
BC547 x 1
BC557 x 1
1N4148 x 2
A100K x 3
B100K x 3
All pots are 9mm Alpha PCB
mount
10K trimmer x 1
100K trimmer x 1
All trimmers are 6mm
SPDT toggle x 1
Power header
Male header strip
Female header strip
Kobiconn sockets x 5
Main PCB:
Populate the Main PCB as shown on the silkscreen, starting with the lowest profile
components, so:
Resistors, diodes
IC sockets
Non-electrolytic capacitors, transistors, trimmers
Power header
Electrolytic capacitors
Finally, cut 3 male header strips to the correct lengths (5, 5, 9) and solder to the PCB so that
the long legs stick out of the rear of the PCB.
Panel PCB:
Populate the Panel PCB as shown on the silkscreen in this order:
100R Resistor
Electrolytic capacitors (the legs will need to be bent by 90° so that the caps lie on the
PCB)
Potentiometers (bend back the mounting lugs , then solder the middle lug in place.
Reflow and adjust as necessary so that they all lie correctly. Solder lugs 1, 3 and the
mounting lugs)
SPDT switch, making sure it’s flush as can be
Cut 3 female header strips to the correct lengths (5, 5, 9) and solder to the PCB so that the
black parts stick out of the rear of the PCB.

Now, place the 5 sockets onto the PCB with their ground lugs pointing towards the bottom
of the PCB. Don’t solder them in place yet! Assemble the panel to the panel PCB, put on the
pots/switch washers and tighten up the nuts. Now set the sockets to the panel using the
nuts, making sure they all sit right. Place the assembly face down and solder the sockets in
place. This process should allow a small space to be created between the rear of the
sockets’ bodies and the PCB, allowing jacks to go in balls-deep (!). Everything should line up
nicely now!
Take the whole thing apart, ie remove the nuts/washers and take the panel away from the
panel PCB. Now solder solid core (cut off resistor legs) between the sockets’ ground tabs
and the adjacent ground pads on the PCB.
Put the panel back together with the panel PCB, plug the Main PCB into the Panel
PCB…you’re done!
Trimmers: turn both fully anti-clockwise (that’s how I like ‘em), adjust to taste.
RDH 19th July 2014
http://www.frequencycentral.co.uk/