need advice aligning a vaccum tube spectrum analyzer

September 11th 03, 11:34 AM

Joe McElvenney

Posts: n/a

Hi,

circa 1950's, completely tubes plus a few microwave crystal diodes.

Just a suggestion but the commonest cause of low sensitivity in spectrum
analysers, that I've experienced, is the front-end mixer diodes. I wonder if
you have checked them out?

Cheers - Joe, G3LLV

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