Hi folks,
building up an active speaker from existing parts/modules, the question arose how to build a star grounding facility.
In total I need to connect eight modules which are all mounted on a large power amp heat sink:
4 power amps
a module containing differential input amps and analog cross over
+/-15V Regulator board
power amp supply
control circuit board
potentially more...
The star grounding concept as such is completely clear, so my question is about physical detail:
How do you electromechanically build up such a star ground configuration? Which mounting and connection materials do you use?
I'd be very grateful for your shared experience and for actually sharing your project picture(s).
Thanks and regards,
Winfried
building up an active speaker from existing parts/modules, the question arose how to build a star grounding facility.
In total I need to connect eight modules which are all mounted on a large power amp heat sink:
4 power amps
a module containing differential input amps and analog cross over
+/-15V Regulator board
power amp supply
control circuit board
potentially more...
The star grounding concept as such is completely clear, so my question is about physical detail:
How do you electromechanically build up such a star ground configuration? Which mounting and connection materials do you use?
I'd be very grateful for your shared experience and for actually sharing your project picture(s).
Thanks and regards,
Winfried
"Electromechanically " and you have layout design all thought out .
Material - the lowest resistance copper wire - solid brass bolts/washers -input earth shortest possible run to star earth -wiring short from inputs to star earth more of a concern than the output earths -non steel connections -copper/brass only ( solid ) --not plated !
This is given on the clear understanding you are not providing a layout/circuit so is just a general point of view and liable to change due to further information being provided.
Material - the lowest resistance copper wire - solid brass bolts/washers -input earth shortest possible run to star earth -wiring short from inputs to star earth more of a concern than the output earths -non steel connections -copper/brass only ( solid ) --not plated !
This is given on the clear understanding you are not providing a layout/circuit so is just a general point of view and liable to change due to further information being provided.
Thanks Duncan,
for the initial advice!
I do have a follow-on question :
What is your recommendation in terms of real Parts? Should I use screwable Parts and screw connect them to a Single Pole? Should I use solderable connectors (which?)? Should I use a connection bar and screw on connectors?
I‘ve never done this, so warnt to do it right.
Thanks for practical feedback!
Winfried
for the initial advice!
I do have a follow-on question :
What is your recommendation in terms of real Parts? Should I use screwable Parts and screw connect them to a Single Pole? Should I use solderable connectors (which?)? Should I use a connection bar and screw on connectors?
I‘ve never done this, so warnt to do it right.
Thanks for practical feedback!
Winfried
Use nuts &bolts not screws that cut a screw thread into the material as more foot/pound of force is available-- in Germany it would be Centimeter Kilogram-Force .
It is better to terminate all the connections directly onto a purpose made large solderable washer that has a centre direct connection to the input earth .
All connections must use top quality solder that doesn't create a resistance over a period of time otherwise use small diameter bolts with holes drilled in the large washer held by a single bolt .
When soldering you must have a complete flow of the solder over both parts for it to be long lasting
It is better to terminate all the connections directly onto a purpose made large solderable washer that has a centre direct connection to the input earth .
All connections must use top quality solder that doesn't create a resistance over a period of time otherwise use small diameter bolts with holes drilled in the large washer held by a single bolt .
When soldering you must have a complete flow of the solder over both parts for it to be long lasting