[R-390] Blowing B+ fuse

[David Wise]

I'd look at the plug-in electrolytic filter caps on the audio deck,
because high leakage is a common failure mode of electrolytic
caps, and because it's easy.
 
73,
Dave Wise (SWL in Portland OR)

	-----Original Message----- 
	From: Barry [mailto:n4buq at aol.com] 
	Sent: Mon 7/4/2005 7:12 AM 
	To: R-390 HF Receiver List 
	Cc: 
	Subject: [R-390] Blowing B+ fuse
	
	

	I finally got a couple of 1/8A B+ fuses (SloBlo) and tried one of them.  The
	radio played for about one minute and blew the fuse.  I was running a 1/4A
	in it before this.  I assume the 1/8A fuse should be sufficient and I have
	something leaking somewhere, right?  I replaced all paper caps, but not the
	electrolytics (yet).  I assume leaky bypass caps is the first place to look?
	Any other suggestions?  My other R390A is a "single-fuser" so I don't know
	if the B+ line is pulling more than 1/8A or not.
	
	Thanks,
	
	Barry