Frequency Central Continuum Phase Shifter Build Documentation

Build documentation for:

continuum phase shifter

An original design by

Frequency central

Rev 2 / April 2013

B100K

A100K

B100K

A100K

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.

Odd: Connects to Odd/Even SPDT lug 1.

Com: Connects to Odd/Even SDPT lug 2.

Even: Connects to Odd/Even SDPT lug 3.

Gnd: Ground

Table of Contents

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Page 1 Build documentation for: continuum phase shifter An original design by Frequency central Rev 2 / April 2013 B100K B100K A100K B100K A100K A100K Key to PCB screen print: n: This signifies NPN BC547 transistors. Note the correct pinout as shown by the half circles.
Page 2 The screen print is missing the signifier for the single opamp on the left, this is a LF351. The screen print is missing the signifier for the quad opamp on the right, this is a TL084. Please observe that the TL084 is ‘the other way round’ with respect to the LF351 and 2 x LM13700.
Page 3 Underside of the PCB showing: Ground bus between sockets and PCB Connections between inputs/output and PCB Connections between SDPT and PCB I use solid core for all of the above. RDH 16 May 2013 http://www.frequencycentral.co.uk/...