[Elecraft] OT - Cruise Operation

[Fred Jensen]

This uber-complexity seems to occur in many early radio equipments, 
often the ones purchased by the government.  I've seen NDB's with two 
non-shifted xtal oscillators, one keyed on/off to achieve the same 
result.  They're the pits if the unkeyed one is the one giving you QRM 
problems on 160.  I've also seen a single oscillator, with the PA 
cathode or grid blocked keyed.  Maybe it's "more complex, more revenue."

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

PS: "Equipments" is a valid word in the US Department of Defense dictionary.

On 9/26/2017 3:38 PM, Edward R Cole wrote:
> When I modified my aircraft beacon (NDB) transmitter I found two xtal 
> oscillators running at about 265-KHz separated by 400-Hz they were 
> keyed by a MCW keyer which shifted the frequency for dots and dashes 
> and back to original frequency for non-keyed signal thus creating 
> 400-Hz MCW.  Aircraft radios are primarily AM so could receive MCW.