Below are a couple of diagrams showing how to: 1) connect the Goldpint 4PID-3 selector switch to the Foreplay III, and 2) a wiring diagram connecting two Goldpt attenuators to the 4PID-3 switch. I would appreciate any feedback pointing out errors. I have also created a Web page showing the same diagrams (better contrast.)
http://www.co-bw.com/Audio_DIY_Foreplay_Goldpoint.htmNOTE: The link below provides resistors for a 20K attenuator that can be used in place of the Sweet Whispers (Sweet Whispers is rated at 15K.) These are .1% IRC resistors. Here is the link for the Mouser IRC project (all of the resistors are IRC's).
http://www.mouser.com:80/ProjectManager/ProjectDetail.aspx?AccessID=868f10f5a1Here is a calculator for that you can use for constructing a stepped attenuator:
http://homepages.tcp.co.uk/~nroberts/atten.htmlThe Diagrams:(http://www.co-bw.com/Images_Audio_DIY/GoldPt_4P_Switch_Terminals_1.jpg)
(http://www.co-bw.com/Images_Audio_DIY/Gold_Pt_Attent_Switch_New.jpg)
Below are the instruction in English. This is easier to read on my site, since I am able to use bold more easily and change font sizes. http://www.co-bw.com/Audio_DIY_Foreplay_Goldpoint.htmGoldpoint Selector Switch Model: 4P-3T-D [4 Poles (circuits), 3 Positions, 1 Deck] To avoid confusion I will use Quadrants instead of Poles when describing the diagrams. Our variables will be Q-Quadrant/Pole, and P for Position.
The 4P switch has 4 Quadrants, and they will be named Q1, Q2, Q3, and Q4 starting from the top and going clockwise/right. Each Circuit has 4 Positions (1, 2, 3, and C) and will be named P1, P2, P3, and Pc. We need now worry about the decks since we are using only one.
Before beginning, notice the order of the positions in each quadrant. For Q1 and Q2, the switch goes from 3, 2, 1, to c. For Q3 and A4 it is the opposite when reading from the top (c, 1, 2, and 3), but the same when reading clockwise 3, 2, 1, c).
Connecting the SwitchQuadrant IQ1-P3 resistor goest to 29U
Q1-P2 resistor goest to 30U
Q1-P1 resistor goest to 36U
Q1-Pc nothing for now
Quadrant II
Left Input #3:Q2-P3 black wire, red wire goes to 29U, and drain wire connects to 28U
Left Input #2:Q2-P2 black wire, red wire goes to 30U, and drain wire connects to 28U
Left Input #3:Q2-P1 black wire, red wire goes to 36U, and drain wire connects to 28U
Q2-Pc nothing for now
Quadrant IIIRight Input #1:Q3-P1 black wire, red wire goes to 20U, and drain wire connects to 28U
Right Input #2:Q3-P2 black wire, red wire goes to 26U, and drain wire connects to 28U
Right Input #3:Q2-P3 black wire, red wire goes to 27U, and drain wire connects to 28U
Q3-Pc nothing for now
Quadrant IVQ4-P3 resistor goes to 20U
Q4-P2 resistor goes to 26U
Q4-P1 resistor goes to 27U
Q4-Pc nothing for now
Connecting Attenuators to SwitchRight Channel AttenuatorAttenuator Ground connects to 16U and Attenuator OUT connects to 17U
Attenuator side: STP black connects to Attenuator ground and red to Attenuator IN
Switch side: STP black connects to Q3-Pc, red connects to Q4-Pc, and drain connects to 28U
Left Channel AttenuatorAttenuator Ground connects to 40U and Attenuator OUT connects to 37U
Attenuator side: STP black connects to Attenuator ground and red to Attenuator IN
Switch side: STP black connects to Q1-Pc, red connects to Q2-Pc, and drain connects to 28U