[ARC5] Oscillator Stability and Old-Time gear

[Richard Knoppow]

      See the service bulletin for the NC-183 at
http://bama.edebris.com/manuals/national/nc183dfsn42/
which suggest drift reduction by replacing some compression trimmers 
with air trimmers.


On 11/16/2015 10:07 AM, Robert Eleazer wrote:
> Isn't it true that the cheaper lower quality gear tends to have compression trimmer caps rather than air trimmer caps?
>
> I have converted the LO trimmers on an NC-270 over to air trimmers because of that - that, and the fact that the corrosion on the chassis made the original compression trimmers rather icky (apologies to the less technically astute individuals who have trouble with such scientific terms).
>
> I see that the BC-348 pretty much used air variables as trimmers.  Was this generally true of the higher quality gear?
>
> Wayne
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL