[R-390] Should this work?

[David Wise]

(Three-fuse versions only) F103 burnt out will kill most of
the RF-IF B+ while keeping the 0A2 alight.

Dave Wise

> -----Original Message-----
> From: JMILLER1706 at cfl.rr.com [mailto:JMILLER1706 at cfl.rr.com]
> Sent: Thursday, May 05, 2005 10:22 AM
> To: Barry
> Cc: R-390 HF Receiver List
> Subject: Re: [R-390] Should this work?
> 
> 
> Is the diode load jumper missing in the back?  Getting 
> voltage there?  
> Bad gain pot?  
> JM
> 
> ----- Original Message -----
> From: Barry <n4buq at aol.com>
> Date: Thursday, May 5, 2005 10:14 am
> Subject: [R-390] Should this work?
> 
> > Working on the "new" R390A.  I have it mostly back together (at 
> > least enough
> > to run some tests).  I tested everything except the RF deck by 
> > substitutingthe modules into my working radio and everything I 
> > tested checked out
> > functional.
> > 
> > When I powered up the radio, I got nothing on the audio except a 
> > small hum
> > when the volume is turned up to 100%.  I didn't figure on hearing 
> > anythingin the way or radio signals since the RF deck is in 
> > complete need of an
> > alignment, but I did expect to hear some noise.
> > 
> > I injected the audio signal generator into pin 7 of the plug that 
> > connectsthe IF deck (P112) and was able to get good audio on both 
> > line and local.
> > 
> > I then decided to take the IF output from the working radio's RF 
> > deck (with
> > the radio tuned to a good strong station) and plug it into the 
> > input of the
> > IF deck on the radio under test.  Since I had checked the IF deck by
> > substituting it into the working radio and it does work there, I 
> > figured I
> > should get some signals that way.  Still nothing.
> > 
> > Is this a valid thing to try?  I realize the IF deck still needs a 
> > touchupfor alignment, but it should be close enough to hear 
> > something through the
> > chain.  It worked when I substituted it into the working radio a 
> > few weeks
> > ago so I assume it should still be working.  Unless something has 
> > brokensince then (and I'll try substituting it again to make 
> > sure), I would think
> > this should produce some signals.  No?
> > 
> > Thanks,
> > 
> > Barry - N4BUQ
> > 
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