[NJARC] Philco 37-650 RF Question

[Al Klase]

Scott,

Use your scope or frequency counter or another receiver to WATCH what 
the local oscillator does when you tune across the band.  Otherwise 
you're just blunderring around in the dark.  Just put the scope probe 
near the oscillator coil.  If the scope has a calibrated sweep you can 
measure the period of the waves form and calculate the frequency. F=1/P.

Al

Scott Roberts wrote:

>Visit our web site - See http://www.njarc.org
>_______________________________________________
>I tried swapping in another trimmer, but that had no
>effect. So I cleaned and reassembled the original one.
>Still not much luck. On the chance my RF generator was
>off, I tried aligning the set with my back up unit,
>but that just made it worse. So now I am going to have
>to go back to step one, realign again, and see where I
>am. After many weeks of this, I am getting ready to
>test its aviation and distance capabilities.
>
>Is there any possible resistor I should look at, that
>may have been damaged by pushing signal through that
>3300M ohm resistor at part 46? Or maybe a cap that may
>have overloaded? All the caps check out ok on the cap
>tester, but I wonder.
>
>And is the solid/stranded wire issue a problem? or
>simply nothing to worry about?
>
>Scott
>
>
>
>  
>

-- 
Al Klase - N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/