[AMRadio] NC300 Oscillator Tracking Nightmare - Success!

[russ dworakowski]

Mark,  hope you like the beans...   the NC-300 is a unique rx in that  it 
does   not run  hot,  never done  any   coupling/  bypass cap
replacements/  never needed them.  I  had a power supply choke
open up,   the ususal  4H4  ballast,  few week tubes,  just align  the  
thing,  when  you think  its performance is anemic.






>From: Mark Foltarz <Foltarz at rocketmail.com>
>Reply-To: amradio at mailman.qth.net
>To: amradio at mailman.qth.net
>Subject: Re: [AMRadio] NC300 Oscillator Tracking Nightmare - Success!
>Date: Tue, 19 Nov 2002 00:02:15 -0800 (PST)
>
>Well after two days of fiddling around I finally got
>it.
>
>  I went back over the IF alignment. Apparently I got
>this right the first time around.
>
>The one thing that was not mentioned in the manual (
>at least the copy on the BAMA site) was that the coils
>for 40 - 10 have TWO adjusting turns available for
>setting the bottom end of the oscillator tracking.
>Once I figured that out it all seemed to snap into
>place. 10 meter through 40 meter bands came together
>pretty quickly.
>
>Then while attempting to adjust the 160 & 80 meter
>oscillator coils I discovered that the adjusting turns
>were fatigued to the point where they were broken. It
>was obvious that someone had really screwed around
>with this radio.
>
>After a bunch of chassis, potentiometer, and switch
>cleaning, this hulk of a radio is coming to life.
>
>Thanks Jim, Gary and Russ for the info.
>
>73 DE KA4JVY
>Mark
>
>__________________________________________________
>Do you Yahoo!?
>Yahoo! Web Hosting - Let the expert host your site
>http://webhosting.yahoo.com
>_______________________________________________
>AMRadio mailing list
>AMRadio at mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/amradio


_________________________________________________________________
Tired of spam? Get advanced junk mail protection with MSN 8. 
http://join.msn.com/?page=features/junkmail