I had a rather unique question asked by a forum member who asked a question regarding the frequency control on the SPP. The question asked was; would anything be hurt if the freq control was removed so they could use the hole in the box plus use the connector and wiring now on the freq control for the addition of a conductivity switch? This would allow the switch to be placed in the hole the freq pot is in now and use the freq pot wiring to connect to the conductivity switch to the proper pcb connection.
Well, the simple answer is no, nothing should be hurt if you remove the freq control completely. In fact, that is exactly what is done by the factory so you do not have a delay control. Better yet, you can unplug the frequency control wiring from the pc board and plug it into the delay pcb connector and now have a delay control instead of a freq control. Yes, the pot value and connections are the same.
There is a problem though when eliminating the freq control and that is, the freq control does something useful in many places where there is a lot of emi noise. Adjusting the frequency control in areas with high EMI does reduce EMI noise and reducing the noise, will increase depth. It is difficult to hear the noise but it can be done.
Out in the field where there is little noise, then eliminating the freq control won't hurt a thing.
So, for you who don't want to add another hole in the box, this is a solution. I don't recommend it for those who might be using the SPP in EMI areas, but in isolated locations, it should be fine.
One more note, the wires to the various controls and pcb connectors are small and delicate. Be careful because after repeated bending they will break. Worse yet, tugging on them can cause real damage not only to the connector but also to the pc board if the connector is pulled away from the board. When in doubt, disconnect the various connections when separating the housings. The pcb is marked well so you can easily put things back where necessary when done.
Reg
Well, the simple answer is no, nothing should be hurt if you remove the freq control completely. In fact, that is exactly what is done by the factory so you do not have a delay control. Better yet, you can unplug the frequency control wiring from the pc board and plug it into the delay pcb connector and now have a delay control instead of a freq control. Yes, the pot value and connections are the same.
There is a problem though when eliminating the freq control and that is, the freq control does something useful in many places where there is a lot of emi noise. Adjusting the frequency control in areas with high EMI does reduce EMI noise and reducing the noise, will increase depth. It is difficult to hear the noise but it can be done.
Out in the field where there is little noise, then eliminating the freq control won't hurt a thing.
So, for you who don't want to add another hole in the box, this is a solution. I don't recommend it for those who might be using the SPP in EMI areas, but in isolated locations, it should be fine.
One more note, the wires to the various controls and pcb connectors are small and delicate. Be careful because after repeated bending they will break. Worse yet, tugging on them can cause real damage not only to the connector but also to the pc board if the connector is pulled away from the board. When in doubt, disconnect the various connections when separating the housings. The pcb is marked well so you can easily put things back where necessary when done.
Reg