Yes, its darn good for 1955 technology. Russ.
From: "Tommye & Jim Wilhite" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: <[email protected]>
Subject: Re: [AMRadio] NC300 Oscillator Tracking Nightmare - Success!
Date: Wed, 20 Nov 2002 09:23:45 -0700
Right on Russ. Mine is sensitive, quite and with both the crystal filter
and IF selectivity, able to copy stations many receivers cannot do. My
only
two complaints about the rig is the alignment of the coils in the front end
and L6 which can be a bear to get right. You will find a service bulletin
about replacing the coil in L6 with a crystal. I didn't have to replace
any
caps in it either and unlike most National receivers, didn't even have to
replace resistors.
Jim de W5JO
> 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 <[EMAIL PROTECTED]>
> >Reply-To: [email protected]
> >To: [email protected]
> >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
> >
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