[R-390] Detector tests followup

Roy Morgan roy.morgan at nist.gov
Thu Sep 21 10:19:55 EDT 2006


At 09:35 AM 9/21/2006, n4buq at knology.net wrote:
>...the noise level would just rise a bit on its own and then fade again.  Not
>a really high rise in noise, but I could tell it was there.  Last night, it
>was as if this "noise rise" suddenly got a lot louder and stayed there.

I suggest you get a nice capacitor hooked up to a probe and when the noise 
appears, short out the test points in the radio one at a time to find what 
stage the noise is coming from. If it's in the IF deck, then pull tubes one 
at a time till it goes away.

Roy



- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing
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Phone 540-822-5911   Cell 301-928-7794
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