I was able to get another tuning capacitor to work pretty close to the desired 1-500KC span once on the linier dial by making the tuning capacitor as a small part of the total capacitance of the circuit and by placing the tuning capacitor across only a portion of the coil and the larger part of the total capacitance across the whole coil. I could actually spread the band out on the high end if I wanted to. I was going to build a receiver using this circular linier dial I think it came from a surplus frequency meter or generator. Some one once told me that it had been done once and the individual that did it actually filed the plates down to calibrate it. I was going to do this as well I had mine working to within a few KCs from one end to the other (700 to 1200) KCs I was going to get out the files when the flood came and washed it all away. I even had a program for the computer to do a least squares analysis on the capacitor which I inputted data from a capacitance meter for 100 places on the dial. With some manipulation of some formulas and with the help of a Visual Basic Programmer friend, I was able to get it to draw a graph of the frequency to dial reading X,Y..
I was an intense project but a fun one. John, WA5BXO _______ ______________________________________________________________ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
