[National] Re: [Hallicrafters] National NC-125 1st IF cathoderesistor

[Carl]

Yep, selected in final test for a particular gain. This was common on a few 
of their radios. If that stage was too hot it would oscillate.

Carl
KM1H



----- Original Message ----- 
From: "rbethman" <rbethman at comcast.net>
To: <Hallicrafters at mailman.qth.net>; "National List" 
<national at mailman.qth.net>
Cc: "James R Carr" <n7fcf at hctc.com>
Sent: Friday, July 04, 2008 3:46 PM
Subject: [National] Re: [Hallicrafters] National NC-125 1st IF 
cathoderesistor


> Jim.
>
> In this type of instance, that resistor would have been a value between 
> those two points based on final alignment at the factory.  This was a 
> typical method of "fine tuning" to get the "desired" results.
>
> You could get a sampling of about 100 of the same model, and find results 
> to plot on a curve,, but it won't make YOUR radio any better.
>
> What value is installed?
>
> Bob - N0DGN
>
> James R Carr wrote:
>> I know this ain't a hallicrafters subject, but does anyone have a NC-125, 
>> that can take a look and tell me the value?
>> The schematic just says 330 to 2200 ohms, and i need to know the actual 
>> value.
>> Thanks
>> Jim Carr
>> N7FCF
>> ______________________________________________________________
>>
>>
>
> -- 
> Bob - NØDGN
>
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