When an rf pcb board is bolted to the radio chassis, is this a satisfactory return path to the DC supply, or should the pcb be insulated from the chassis and cables used for the return path.
Confused re grounding!
Trev

 

Generally the radio chassis should be more of a shield/ground plane not a DC current carrying conductor so a return wire (with low resistance) to the DC power supply (where the return terminal(s) on the power supply might also be connect to the chassis) is suggested. RF board mounting point grounding is a circuit design decision but for most circuits your want the RF/signal ground at some point to be at equal signal ground potential to the chassis with a low impedance connection.

https://www.analog.com/en/analog-dialogue/articles/staying-well-grounded.html

 

Many thanks for your speedy reply, this makes everything a lot clearer regarding grounding.
Trev

 

hi Trev,
Another Grounding PDF for your database.
E

 

hi Trev,
Another Grounding PDF for your database.
E

Many thanks Eric, this is a great help as I can see what's happening in the circuit and the chassis. Have stored the PDFs for reading later.
Regards T