[R-390] 0.5-8.0 Low Sensitivity (Long)

Roy Morgan roy.morgan at nist.gov
Wed Aug 16 09:02:34 EDT 2006


At 06:28 AM 8/16/2006, dmartin wrote:
>Have a 390A here with the low sensitivity problem below 8 megs....Threads
>for slugs on Z213-2 and -3 cans may be all the way out during one 
>alignment effort and
>then have to be screwed all the way in flush with the rack during a 
>subsequent
>alignment hours later.


THIS is your clue that a capacitor (or possibly the inductor) in that 
circuit is changing values.

Get that can out of there and replace all silver mica caps inside.

Roy


- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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