[R-390] Broadcast Band On Other Bands

Mon, 22 Apr 2002 20:43:57 -0700

My guess is that you've got a leaky cap. Check the toobs but suspect a cap.
Parasitic oscillations often show themselves as audio clicks or pops and the
presence of BC stations on the HF bands would make me think of a parasitic
oscillator that heterodynes stuff from the BC band into the detector chain.
I wouldn't hazard a guess as to exactly where in the chain, but there are
gents with opinions here, Oh Jeez!

Bob

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Mike Hardie
Sent: Monday, April 22, 2002 5:43 PM
To: [email protected]
Subject: [R-390] Broadcast Band On Other Bands

My R-390A was operating normally on 3870 but after a fairly loud audio click
overlapping local broadcast stations could be heard.  With some tuning
around these "stations" occur at various places on several bands, noteably
the 3, 13,14,15 Meg bands, maybe others.  It's hard to tell if the selected
frequency is being received.  The 1 to 2 Meg band seems OK.

Ideas before the trouble shooting begins?

Mike VE7MMH

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