Title: Crystal Cal Circuit for Vintage Receivers Post by: WA4WAX on October 15, 2015, 10:25:04 PM Need one? Try this one. I dig the neon modulator!
Page 139 http://americanradiohistory.com/Archive-Electronics-World/60s/1960/Electronics-World-1960-10.pdf Matt Title: Re: Crystal Cal Circuit for Vintage Receivers Post by: MikeKE0ZUinkcmo on October 16, 2015, 07:56:07 PM A similar circuit, called a "whistle stop" was a common modification for crystal controlled Aircraft transmitters in the 50s and early 60s. It allowed the pilot to simply switch on the whistle stop switch and tune the receiver to the transmit frequency. Much simpler than hunting for the desired tower, FSS, intercom, or ground control frequency. Works well. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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