With that trick, you can switch four directions using only one single coax cable, two RBS-1P and another relay that is switched with +12Vdc and 9Vac. With 0V and -12V you control one RBS1-P, with 9Vac and +12V you select and control the other RBS1-P 73 de Guido, ik2bcp
Il 24/03/2012 13:03, Kenneth Grimm ha scritto: > Thanks very much Guido! That is the answer I was looking for. I had > forgotten about the use of AC in switching. Now that you have told > me, it is obvious! Thanks again OM. > > 73, > > Ken - K4XL > > On Fri, Mar 23, 2012 at 6:46 PM, Guido Tedeschi <[email protected] > <mailto:[email protected]>> wrote: > > Il 23/03/2012 16:10, Kenneth Grimm ha scritto: > > Both of these boards appear to have an electrolytic capacitor > > installed. On both boards the electrolytic appears to be > associated with > > the direction switching relay. None of the two wire beverage > diagrams that > > I have seen have such a cap and I wonder what its function is > and how it is > > connected in the circuit. I am told that the value is 100 mfd @ > 50 volts. > > > > Apparently the cap isn't necessary, but since I have a few in my > junk box, > > this might be an opportunity to put one of them to use! > > > If you are talking about the RBS-1P, the electrolytic capacitor is > connected in parallel with the relay coil (positive terminal of > capacitor connected to ground), after the diode with anode > connected to > the relay, and it is needed because you can switch the direction also > with an AC voltage (about 8-9Vac). > If you will never use an AC voltage but only -12Vdc, the capacitor is > not needed... > 73 de Guido, ik2bcp > > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > > > > > -- > Ken - K4XL > BoatAnchor Manual Archive > BAMA - http://bama.edebris.com > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
