Typically, a PTO refers to a permeability tuned oscillator. In other words, it tunes the inductor with a core that moves in and out of the coil. A VFO typically refers to an oscillator that varies a capacitor to vary the frequency. However, VFO is sometimes used to refer to a traditional VFO, a PTO, and even VCO.
-----Original Message----- From: Nigel Gunn G8IFF/W8IFF <ni...@ngunn.net> To: Neil M Califano <cchange...@yahoo.com> Cc: Drakelist@zerobeat.net Sent: Fri, Feb 18, 2011 6:10 pm Subject: Re: [Drakelist] PTO/VFO No. On 18-Feb-11 23:03, Neil M Califano wrote: > Is there any difference between a PTO and a VFO? The R-4 has a PTO and the > R-4A a VFO per the specs. > > > > > _______________________________________________ > Drakelist mailing list > Drakelist@zerobeat.net > http://mailman.zerobeat.net/mailman/listinfo/drakelist > -- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail ni...@ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN, EAA382. _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
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