I may do this again Wayne as this has sparked and interest for me. A project of this type makes one appreciate the workmanship and engineering that goes into some of the old radios that tracked so well. Frequency counters are wonderful pieces of equipment but when you throw the switch on a 100KC calibrator and pull the VFO/PTO dial zero beat just as the dial mark passes zero, it really makes you feel good.
John -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sara & Wayne Steiner Sent: Tuesday, March 13, 2007 6:13 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] National PW Dial I found that the variables in the command set series of transmitters are very close to straight line frequency. Some years ago I built a variable osc. using one of those caps and a mechcanical digital counter and was in within less than .5 khz over a 200khz band (160m). I of course had to do some trial and error plate bending. Over a 25 khz portion of the band and a small variable osc padder I could be "spot on". wayne , N0TE ______________________________________________________________ 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.
